Americas Headquarters:
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
© 2017 Cisco Systems, Inc. This document can be reproduced in full without any modifications.
Cisco Firepower 4100 and 9300 Security Appliances
Security Target
ST Version 1.0
September 11, 2017
Cisco FP 4100 and 9300 Security Target
2
Table of Contents
1 SECURITY TARGET INTRODUCTION .............................................................................9
1.1 ST and TOE Reference ................................................................................................... 9
1.2 TOE Overview................................................................................................................ 9
1.2.1 TOE Product Type ...................................................................................................... 9
1.2.2 Supported non-TOE Hardware/ Software/ Firmware............................................... 12
1.3 TOE DESCRIPTION.................................................................................................... 12
1.4 TOE Evaluated Configuration ...................................................................................... 14
1.5 Physical Scope of the TOE ........................................................................................... 15
1.6 Logical Scope of the TOE............................................................................................. 16
1.6.1 Security Audit........................................................................................................... 16
1.6.2 Cryptographic Support.............................................................................................. 16
1.6.3 Full Residual Information Protection........................................................................ 17
1.6.4 Identification and authentication............................................................................... 17
1.6.5 Security Management ............................................................................................... 17
1.6.6 Protection of the TSF................................................................................................ 18
1.6.7 TOE Access .............................................................................................................. 18
1.6.8 Trusted path/Channels .............................................................................................. 18
1.6.9 Filtering..................................................................................................................... 18
1.7 Excluded Functionality................................................................................................. 19
2 Conformance Claims.............................................................................................................21
2.1 Common Criteria Conformance Claim......................................................................... 21
2.2 Protection Profile Conformance ................................................................................... 21
2.2.1 Protection Profile Additions or Modifications.......................................................... 21
2.3 Protection Profile Conformance Claim Rationale ........................................................ 21
2.3.1 TOE Appropriateness................................................................................................ 21
2.3.2 TOE Security Problem Definition Consistency........................................................ 21
2.3.3 Statement of Security Requirements Consistency.................................................... 22
3 SECURITY PROBLEM DEFINITION................................................................................23
3.1 Assumptions.................................................................................................................. 23
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3.2 Threats........................................................................................................................... 24
3.3 Organizational Security Policies................................................................................... 29
4 SECURITY OBJECTIVES...................................................................................................30
4.1 Security Objectives for the TOE................................................................................... 30
4.2 Security Objectives for the Environment...................................................................... 32
5 SECURITY REQUIREMENTS ...........................................................................................33
5.1 Conventions .................................................................................................................. 33
5.2 TOE Security Functional Requirements ....................................................................... 33
5.3 SFRs Drawn from FWcPP............................................................................................ 35
5.3.1 Security audit (FAU)................................................................................................. 35
5.3.2 Cryptographic Support (FCS)................................................................................... 38
5.3.3 User data protection (FDP)....................................................................................... 45
5.3.4 Identification and authentication (FIA) .................................................................... 45
5.3.5 Security management (FMT).................................................................................... 47
5.3.6 Protection of the TSF (FPT) ..................................................................................... 48
5.3.7 TOE Access (FTA) ................................................................................................... 49
5.3.8 Trusted Path/Channels (FTP).................................................................................... 50
5.3.9 Stateful Traffic Filtering (FFW) ............................................................................... 51
5.4 SFRs from the VPNGWcEP......................................................................................... 53
5.4.1 Cryptographic Support (FCS)................................................................................... 53
5.4.2 Identification and authentication (FIA) .................................................................... 54
5.4.3 Security management (FMT).................................................................................... 55
5.4.4 Packeting Filtering (FPF).......................................................................................... 55
5.4.5 Protection of the TSF (FPT) ..................................................................................... 56
5.4.6 TOE Access (FTA) ................................................................................................... 56
5.5 TOE SFR Dependencies Rationale for SFRs Found in FWcPP................................... 57
5.6 Security Assurance Requirements ................................................................................ 57
5.6.1 SAR Requirements.................................................................................................... 57
5.6.2 Security Assurance Requirements Rationale............................................................ 57
5.7 Assurance Measures...................................................................................................... 57
6 TOE Summary Specification ................................................................................................59
6.1 TOE Security Functional Requirement Measures ........................................................ 59
Cisco FP 4100 and 9300 Security Target
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7 Supplemental TOE Summary Specification Information......................................................93
7.1 Tracking of Stateful Firewall Connections................................................................... 93
7.1.1 Establishment and Maintenance of Stateful Connections......................................... 93
7.1.2 Viewing Connections and Connection States........................................................... 93
7.1.3 Examples................................................................................................................... 97
7.2 Key Zeroization ............................................................................................................ 98
8 Annex A: References ..........................................................................................................101
Cisco Adaptive Security Appliances Security Target
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List of Tables
TABLE 1 ACRONYMS............................................................................................................................................................................................ 6
TABLE 2: ST AND TOE IDENTIFICATION ........................................................................................................................................................ 9
TABLE 3: FP 9300 COMPONENTS ..................................................................................................................................................................10
TABLE 4: IT ENVIRONMENT COMPONENTS...................................................................................................................................................12
TABLE 5 HARDWARE MODELS AND SPECIFICATIONS .................................................................................................................................15
TABLE 6: EXCLUDED FUNCTIONALITY...........................................................................................................................................................19
TABLE 7: PROTECTION PROFILES....................................................................................................................................................................21
TABLE 8 TOE ASSUMPTIONS ...........................................................................................................................................................................23
TABLE 9 THREATS.............................................................................................................................................................................................24
TABLE 10 ORGANIZATIONAL SECURITY POLICIES.......................................................................................................................................29
TABLE 11 SECURITY OBJECTIVES FOR THE TOE..........................................................................................................................................30
TABLE 12 SECURITY OBJECTIVES FOR THE ENVIRONMENT........................................................................................................................32
TABLE 13 SECURITY FUNCTIONAL REQUIREMENTS....................................................................................................................................33
TABLE 14 AUDITABLE EVENTS.......................................................................................................................................................................35
TABLE 15: ASSURANCE MEASURES.................................................................................................................................................................57
TABLE 16: ASSURANCE MEASURES.................................................................................................................................................................57
TABLE 17: HOW TOE SFRS ARE SATISFIED ................................................................................................................................................59
TABLE 18: CAVP ALGORITHMS ......................................................................................................................................................................64
TABLE 19: SYNTAX DESCRIPTION...................................................................................................................................................................93
TABLE 20: CONNECTION STATE TYPES..........................................................................................................................................................94
TABLE 21: CONNECTION STATE FLAGS..........................................................................................................................................................95
TABLE 22: TCP CONNECTION DIRECTIONALITY FLAGS ...............................................................................................................................97
TABLE 23: TOE KEY ZEROIZATION................................................................................................................................................................99
TABLE 24: REFERENCES ................................................................................................................................................................................101
List of Figures
FIGURE 1: FP 9300 (FIRST) AND FP 4100 (SECOND)...............................................................................................................................13
FIGURE 2: EXAMPLE TOE DEPLOYMENT......................................................................................................................................................14
Cisco FP 4100 and 9300 Security Target
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List of Acronyms
The following acronyms and abbreviations are common and may be used in this Security Target:
Table 1 Acronyms
Acronyms /
Abbreviations
Definition
AAA Administration, Authorization, and Accounting
ACL Access Control List
AES Advanced Encryption Standard
ASDM Adaptive Security Device Manager
CC Common Criteria
CEM Common Evaluation Methodology
CM Configuration Management
DHCP Dynamic Host Configuration Protocol
EAL Evaluation Assurance Level
EHWIC Ethernet High-Speed WAN Interface Card
ESP Encapsulating Security Payload
Gbps Gigabits per second
GE Gigabit Ethernet port
HTTPS Hyper-Text Transport Protocol Secure
ICMP Internet Control Message Protocol
IKE Internet Key Exchange
IPsec Internet Protocol Security
IT Information Technology
NDcPP Network Device Collaborative Protection Profile
OS Operating System
REST Representational State Transfer
PoE Power over Ethernet
POP3 Post Office Protocol
PP Protection Profile
SA Security Association
SFP Small–form-factor pluggable port
SHA Secure Hash Algorithm
SIP Session Initiation Protocol
SSHv2 Secure Shell (version 2)
SSM Security Services Module
SSP Security Services Processor
ST Security Target
TCP Transport Control Protocol
TOE Target of Evaluation
TSC TSF Scope of Control
TSF TOE Security Function
TSP TOE Security Policy
Cisco Adaptive Security Appliances Security Target
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Acronyms /
Abbreviations
Definition
UDP User Datagram Protocol
VLAN Virtual Local Area Network
VPN Virtual Private Network
WAN Wide Area Network
WIC WAN Interface Card
Cisco FP 4100 and 9300 Security Target
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DOCUMENT INTRODUCTION
Prepared By:
Cisco Systems, Inc.
170 West Tasman Dr.
San Jose, CA 95134
This document provides the basis for an evaluation of a specific Target of Evaluation (TOE), the
Adaptive Security Appliances (ASA). This Security Target (ST) defines a set of assumptions
about the aspects of the environment, a list of threats that the product intends to counter, a set of
security objectives, a set of security requirements, and the IT security functions provided by the
TOE which meet the set of requirements. Administrators of the TOE will be referred to as
administrators, authorized administrators, TOE administrators, semi-privileged, privileged
administrators, and security administrators in this document.
Cisco Adaptive Security Appliances Security Target
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1 SECURITY TARGET INTRODUCTION
The Security Target contains the following sections:
 Security Target Introduction [Section 1]
 Conformance Claims [Section 2]
 Security Problem Definition [Section 3]
 Security Objectives [Section 4]
 IT Security Requirements [Section 5]
 TOE Summary Specification [Section 6]
 Supplemental TOE Summary Specification Information [Section 7]
 References [Section 8]
The structure and content of this ST comply with the requirements specified in the Common
Criteria (CC), Part 1, Annex A, and Part 2.
1.1 ST and TOE Reference
This section provides information needed to identify and control this ST and its TOE.
Table 2: ST and TOE Identification
Name Description
ST Title Cisco Firepower 4100 and 9300 Security Appliances
ST Version 1.0
Publication Date September 11, 2017
Vendor and ST Author Cisco Systems, Inc.
TOE Reference Cisco Firepower 4100 and 9300 Security Appliances
TOE Hardware
Models
 ASA Firepower 4100 Series (4110, 4120, 4140, and 4150)
 ASA Firepower 9300 (including chassis, supervisor blade, security module)
TOE Software Version FXOS 2.0.1, ASA 9.6.2 and ASDM 7.6
ST Evaluation Status In Evaluation
Keywords Firewall, VPN Gateway, Router
1.2 TOE Overview
The Cisco Firepower 4100 and 9300 security appliances (TOE) are purpose-built, scalable
platforms with firewall and VPN capabilities provided by Adaptive Security Appliances (ASA)
software. The TOE includes the hardware models as defined in Table 2 of section 1.1.
1.2.1 TOE Product Type
The TOE consists of hardware and software that provide connectivity and security services onto
a single, secure device.
Cisco FP 4100 and 9300 Security Target
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The Cisco firepower 9300 security appliance is a modular, scalable, carrier-grade appliance that
includes the Chassis (including fans and power supply), Supervisor Blade1
(to manage the
security application running on the security module), network module (optional) and security
module that contains the security application which in this evaluation is the ASA. The FP4100
Series appliance is a complete standalone, bundle unit that contains everything required above in
one appliance. More details on the FP4100 is provided in sections 1.3 and 1.5.
Table 3: FP 9300 Components
Component Required Security-
Relevant
Description
Chassis Yes No Provides four fans to cool the entire system, two power
supplies (AC or DC), and slots for the Supervisor blade,
security module, and network module.
Supervisor
Blade (or
Module)
Yes Yes Running Firepower eXtensible Operating System (FXOS),
this component is used to manage the application (e.g., ASA)
running on the security module. The processor for the
Supervisor Blade is an Intel Xeon E3-1100.
Security
Module
Yes Yes FP 9300 must have at least one security module in the
evaluated configuration but can handle up to 3 security
modules at a time. Each security module can load one
security application such as ASA, Firepower Threat Defense
(FTD2
), and third-party application (e.g., Radware
DefensePro).
There are two type of security modules:
 SM-24
 SM-36
Security module types cannot be mixed within a chassis. SM-
24 is lower cost and lower performance. SM-36 security
modules deliver higher performance.
Network
Module
No No Provides additional network interfaces to the system. FP 9300
can handle two single-wide network modules or one double-
wide network module.
For firewall services, the ASA running on the security module provides application-aware
stateful packet filtering firewalls. A stateful packet filtering firewall controls the flow of IP
traffic by matching information contained in the headers of connection-oriented or connection-
less IP packets against a set of rules specified by the authorized administrator for firewalls. This
header information includes source and destination host (IP) addresses, source and destination
port numbers, and the transport service application protocol (TSAP) held within the data field of
1
Also known as the Cisco FXOS chassis.
2
Currently, only the ASA is in scope in this evaluation.
Cisco Adaptive Security Appliances Security Target
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the IP packet. Depending upon the rule and the results of the match, the firewall either passes or
drops the packet. The stateful firewall remembers the state of the connection from information
gleaned from prior packets flowing on the connection and uses it to regulate current packets. The
packet will be denied if the security policy is violated.
In addition to IP header information, the TOE mediates information flows on the basis of other
information, such as the direction (incoming or outgoing) of the packet on any given firewall
network interface. For connection-oriented transport services, the firewall either permits
connections and subsequent packets for the connection or denies the connection and subsequent
packets associated with the connection.
The application-inspection capabilities automate the network to treat traffic according to detailed
policies based not only on port, state, and addressing information, but also on application
information buried deep within the packet header. By comparing this deep-packet inspection
information with corporate policies, the firewall will allow or block certain traffic. For example,
it will automatically drop application traffic attempting to gain entry to the network through an
open port-even if it appears to be legitimate at the user and connection levels-if a business's
corporate policy prohibits that application type from being on the network.
The TOE also provides IPsec connection capabilities. All references within this ST to “VPN”
connectivity refer to the use of IPsec tunnels to secure connectivity to and/or from the TOE, for
example, gateway-to-gateway3
VPN or remote access VPN. Other uses refer to the use of IPsec
connections to tunnel traffic that originates from or terminates at the TOE itself, such as for
transmissions from the TOE to remote audit/syslog servers, or AAA servers, or for an additional
layer of security for remote administration connections to the TOE, such as SSH or TLS
connections tunneled in IPsec.
The TOE can operate in a number of modes: as a single standalone device, or in high-availability
(HA) failover-pairs; with a single-context, or with multiple-contexts within each single/pair; as a
transparent firewall when deployed in single-context, or with one or more contexts connected to
two or many IP subnets when configured in router mode.
For management purposes, the ASDM is included. ASDM allows the TOE to be managed from a
graphical user interface. Its features include:
 TLS/HTTPS encrypted sessions.
 Rapid Configuration: in-line and drag-and-drop policy editing, auto complete,
configuration wizards, appliance software upgrades, and online help;
 Powerful Diagnostics: Packet Tracer, log-policy correlation, packet capture, regular
expression tester, and embedded log reference;
 Real-Time Monitoring: device, firewall, content security, real-time graphing; and
tabulated metrics;
 Management Flexibility: A lightweight and secure design enables remote management of
multiple security appliances.
3
This is also known as site-to-site or peer-to-peer VPN.
Cisco FP 4100 and 9300 Security Target
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1.2.2 Supported non-TOE Hardware/ Software/ Firmware
The TOE supports (in some cases optionally) the following hardware, software, and
firmware in its environment when the TOE is configured in its evaluated configuration:
Table 4: IT Environment Components
Component Required Usage/Purpose Description for TOE performance
Management
Workstation with
SSH Client
Yes This includes any IT Environment Management workstation with SSH
client installed that is used by the TOE administrator to support TOE
administration through SSHv2 protected channels. Any SSH client that
supports SSHv2 may be used. For ASA, the SSH must be tunneled over
IPsec.
ASDM
Management
Platform
Yes The ASDM 7.6 operates from any of the following operating
systems:
 Microsoft Windows 7, 8, Server 2008, and Server 2012
 Apple OS X 10.4 and later
 Red Hat Enterprise Linux 5
Note that that ASDM software is installed on the TOE and the
management platform is used to connect to the TOE and run the ASDM.
The only software installed on the management platform is a Cisco
ASDM Launcher.
Audit (syslog)
Server
Yes This includes any syslog server to which the TOE would transmit syslog
messages. Connections to remote audit servers must be tunneled in IPsec
or TLS.
RADIUS AAA
Server
No This includes any IT environment RADIUS AAA server that provides
single-use authentication mechanisms. This can be any RADIUS AAA
server that provides single-use authentication. The TOE correctly
leverages the services provided by this RADIUS AAA server to provide
single-use authentication to administrators. Connections to remote AAA
servers must be tunneled in IPsec.
Certification
Authority
Yes This includes any IT Environment Certification Authority on the TOE
network. This can be used to provide the TOE with a valid certificate
during certificate enrollment.
Remote Tunnel
Endpoint
Yes This includes any peer with which the TOE participates in tunneled
communications. Remote tunnel endpoints may be any device or
software client that supports IPsec tunneling. Both VPN clients and
VPN gateways can be considered to be remote tunnel endpoints.
NTP Server No The TOE supports communications with an NTP server. Connections to
remote NTP servers can optionally be tunneled in IPsec.
1.3 TOE DESCRIPTION
This section provides an overview and description of the TOE. The TOE is comprised of both
software and hardware. The model is comprised of the following: FP 4110, 4120, 4140, and
4150 and 9300. The software is comprised of the Adaptive Security Appliance software image
Release 9.6.2, with ASDM 7.6, running on the security module and FXOS 2.0.1 running on
Supervisor blade.
Cisco Adaptive Security Appliances Security Target
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The models that comprise the TOE have common hardware characteristics (for example, the
same FXOS image runs on all the models 4100 series and 9300, and the same ASA image runs
on the security module regardless of the platforms). These differing characteristics affect only
non-TSF relevant functionality (such as throughput, processing speed, number and type of
network connections supported, number of concurrent connections supported, and amount of
storage) and therefore support security equivalency of the TOE in terms of hardware.
Figure 1: FP 9300 (first) and FP 4100 (second)
The hardware components in the TOE have the following distinct characteristics:
o 4110 - The Firepower 4110 has a processor Intel Xeon E5-2600, Intel Xeon E3-1100 on
Supervisor Blade, one AC power supply module, one 200-GB SSD, and 64-GB of DDR4
RAM. You can add another power supply module for redundant power.
o 4120 - The Firepower 4120 has a processor Intel Xeon E5-2600, Intel Xeon E3-1100 on
Supervisor Blade, one AC power supply module, one 200-GB SSD, and 128-GB of DDR4
RAM. You can add another power supply module for redundant power.
o 4140 - The Firepower 4140 has a processor Intel Xeon E5-2600, Intel Xeon E3-1100 on
Supervisor Blade, dual AC power supply modules, one 400-GB SSD, and 256-GB of DDR4
RAM.
o 4150 – The Firepower 4150 has a processor Intel Xeon E5-2600, Intel Xeon E3-1100 on
Supervisor Blade, dual AC power supply modules, one 400-GB SSD, and 256-GB of DDR4
RAM.
o 9300 – See section 1.2.1.
o The same FXOS and ASA images run on all of the model platforms identified above.
Americas Headquarters:
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
© 2017 Cisco Systems, Inc. This document can be reproduced in full without any modifications.
1.4 TOE Evaluated Configuration
The TOE consists of one or more physical devices as specified in section 1.5 below and includes
the Cisco ASA software, which in turn includes the ASDM software. Each instantiation of the
TOE has two or more network interfaces, and is able to filter IP traffic to and through those
interfaces.
The TOE can optionally connect to an NTP server for clock updates. If the TOE is to be
remotely administered, the management station must connect using SSHv2 (for ASA, SSH over
IPsec). When ASDM is used a remote workstation with a TLS-enabled browser must be
available. A syslog server can also be used to store audit records, and the syslog server must
support syslog over TLS or IPsec. The TOE is able to filter connections to/from these external
using its IP traffic filtering, and can encrypt traffic where necessary using TLS, SSH, and/or
IPsec.
The following figure provides a visual depiction of an example TOE deployment. The TOE
boundary is surrounded with a hashed red line.
Figure 2: Example TOE Deployment
The previous figure includes the following:
 Several examples of TOE Models
 VPN Peer (Operational Environment) or another instance of the TOE
 VPN Peer (Operational Environment) with Cisco VPN Client or AnyConnect Client
 Management Workstation (Operational Environment) with ASDM
 Remote Authentication Server (Operational Environment)
Cisco Adaptive Security Appliances Security Target
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 NTP Server (Operational Environment)
 Peer CA (Operational Environment)
 Syslog server (Operational Environment)
1.5 Physical Scope of the TOE
The TOE is a hardware and software solution comprised of the components described in Table 5:
Table 5 Hardware Models and Specifications
TOE Configuration Hardware Configurations Software Version
FP 4110
FP 4120
FP 4140
FP 4150
The Firepower 4100 chassis contains
the following components:
 Network module 1 with eight
fixed SFP+ ports (1G and
10G connectivity), the
management port, RJ-45
console port, Type A USB
port, PID and S/N card,
locator indicator, and power
switch
 Two network modules slots
(network module 2 and
network module 3)
 Two (1+1) redundant power
supply module slots
 Six fan module slots
 Two SSD bays
FXOS release 2.0.1
and ASA release 9.6.2
FP 9300 The Firepower 9300 chassis contains
the following components:
 Firepower 9300 Supervisor—
Chassis supervisor module
◦ Management port
◦ RJ-45 console port
◦ Type A USB port
◦ Eight ports for 1 or 10
Gigabit Ethernet SFPs (fiber
and copper)
 Firepower 9300 Security
Module—Up to three security
modules
◦ 800 GB of solid state
storage per security blade (2
x 800 GB solid state drives
FXOS release 2.0.1
and ASA release 9.6.2
Cisco FP 4100 and 9300 Security Target
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running RAID1)
 Firepower Network
Module—Two single-wide
network modules or one
double-wide network module
 Two power supply modules
(AC or DC)
 Four fan modules
ASDM Included on all ASA 9.6.2 Release 7.6
1.6 Logical Scope of the TOE
The TOE is comprised of several security features including stateful traffic firewall and VPN
gateway. Each of the security features identified above consists of several security
functionalities, as identified below.
1. Security Audit
2. Cryptographic Support
3. Full Residual Information Protection
4. Identification and Authentication
5. Security Management
6. Protection of the TSF
7. TOE Access
8. Trusted Path/Channels
9. Filtering
These features are described in more detail in the subsections below.
1.6.1 Security Audit
The TOE provides extensive auditing capabilities. The TOE can audit events related to
cryptographic functionality, identification and authentication, and administrative actions. The
TOE generates an audit record for each auditable event. The administrator configures auditable
events, performs back-up operations, and manages audit data storage. The TOE provides the
administrator with a circular audit trail or a configurable audit trail threshold to track the storage
capacity of the audit trail. Audit logs are backed up over an encrypted channel to an external
audit server.
1.6.2 Cryptographic Support
The TOE provides cryptography in support of other TOE security functionality. The TOE
provides cryptography in support of secure connections using IPsec and TLS, and remote
administrative management via SSHv2 (for ASA, SSH over IPsec), and TLS/HTTPS. The
cryptographic random bit generators (RBGs) are seeded by an entropy noise source.
Cisco Adaptive Security Appliances Security Target
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1.6.3 Full Residual Information Protection
The TOE ensures that all information flows from the TOE do not contain residual information
from previous traffic. Packets are padded with zeros. Residual data is never transmitted from
the TOE.
1.6.4 Identification and authentication
The TOE performs two types of authentication: device-level authentication of the remote device
(VPN peers) and user authentication for the authorized administrator of the TOE. Device-level
authentication allows the TOE to establish a secure channel with a trusted peer. The secure
channel is established only after each device authenticates the other. Device-level authentication
is performed via IKE/IPsec X509v3 certificate based authentication or pre-shared key methods.
The TOE provides authentication services for administrative users wishing to connect to the
TOEs secure CLI and GUI administrator interfaces. The TOE requires authorized administrators
to authenticate prior to being granted access to any of the management functionality. The TOE
can be configured to require a minimum password length of 15 characters as well as mandatory
password complexity rules. The TOE also implements a lockout mechanism if the number of
configured unsuccessful threshold has been exceeded.
The TOE provides administrator authentication against a local user database. Password-based
authentication can be performed on the serial console or SSH and HTTPS interfaces. The
SSHv2 interface also supports authentication using SSH keys. The TOE optionally supports use
of any RADIUS AAA server (part of the IT Environment) for authentication of administrative
users attempting to connect to the TOE.
1.6.5 Security Management
The TOE provides secure administrative services for management of general TOE configuration
and the security functionality provided by the TOE. All TOE administration occurs either
through a secure SSHv2 (for ASA, SSH over IPsec) or TLS/HTTPS session, or via a local
console connection. The TOE provides the ability to securely manage all TOE administrative
users; all identification and authentication; all audit functionality of the TOE; all TOE
cryptographic functionality; the timestamps maintained by the TOE; TOE configuration file
storage and retrieval, and the information flow control policies enforced by the TOE including
encryption/decryption of information flows for VPNs. The TOE supports an “authorized
administrator” role, which equates to any account authenticated to an administrative interface
(CLI or GUI, but not VPN), and possessing sufficient privileges to perform security-relevant
administrative actions.
When an administrative session is initially established, the TOE displays an administrator-
configurable warning banner. This is used to provide any information deemed necessary by the
administrator. After a configurable period of inactivity, administrative sessions will be
terminated, requiring administrators to re-authenticate.
Cisco FP 4100 and 9300 Security Target
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1.6.6 Protection of the TSF
The TOE protects against interference and tampering by untrusted subjects by implementing
identification, authentication, and access controls to limit configuration to authorized
administrators. The TOE prevents reading of cryptographic keys and passwords.
Additionally TOE is not a general-purpose operating system and access to the TOE memory
space is restricted to only TOE functions.
The TOE internally maintains the date and time. This date and time is used as the timestamp that
is applied to audit records generated by the TOE. Administrators can update the TOE’s clock
manually, or can configure the TOE to use NTP to synchronize the TOE’s clock with an external
time source. Additionally, the TOE performs testing to verify correct operation of the appliance
itself and that of the cryptographic module. Whenever any system failures occur within the TOE
the TOE will cease operation.
1.6.7 TOE Access
When an administrative session is initially established, the TOE displays an administrator-
configurable warning banner. This is used to provide any information deemed necessary by the
administrator. After a configurable period of inactivity, administrator and VPN client sessions
will be terminated, requiring re-authentication. The TOE also supports direct connections from
VPN clients, and protects against threats related to those client connections. The TOE
disconnects sessions that have been idle too long, and can be configured to deny sessions based
on IP, time, and day, and to NAT external IPs of connecting VPN clients to internal network
addresses.
1.6.8 Trusted path/Channels
The TOE supports establishing trusted paths between itself and remote administrators using
SSHv2 for CLI access (for ASA, SSH over IPsec), and TLS/HTTPS for GUI/ASDM access.
The TOE supports use of TLS and/or IPsec for connections with remote syslog servers. The
TOE can use IPsec to encrypt connections with remote authentication servers (e.g. RADIUS).
The TOE can establish trusted paths of peer-to-peer VPN tunnels using IPsec, and VPN client
tunnels using IPsec or TLS. Note that the VPN client is in the operational environment.
1.6.9 Filtering
The TOE provides stateful traffic firewall functionality including IP address-based filtering (for
IPv4 and IPv6) to address the issues associated with unauthorized disclosure of information,
inappropriate access to services, misuse of services, disruption or denial of services, and
network-based reconnaissance. Address filtering can be configured to restrict the flow of
network traffic between protected networks and other attached networks based on source and/or
destination IP addresses. Port filtering can be configured to restrict the flow of network traffic
between protected networks and other attached networks based on the originating (source) and/or
receiving (destination) port (service). Stateful packet inspection is used to aid in the
performance of packet flow through the TOE and to ensure that only packets are only forwarded
Cisco Adaptive Security Appliances Security Target
19
when they’re part of a properly established session. The TOE supports protocols that can spawn
additional sessions in accordance with the protocol RFCs where a new connection will be
implicitly permitted when properly initiated by an explicitly permitted session. The File Transfer
Protocol is an example of such a protocol, where a data connection is created as needed in
response to an explicitly allowed command connection. System monitoring functionality
includes the ability to generate audit messages for any explicitly defined (permitted or denied)
traffic flow. TOE administrators have the ability to configure permitted and denied traffic flows,
including adjusting the sequence in which flow control rules will be applied, and to apply rules
to any network interface of the TOE.
The TOE also provides packet filtering and secure IPsec tunneling. The tunnels can be
established between two trusted VPN peers as well as between remote VPN clients and the TOE.
More accurately, these tunnels are sets of security associations (SAs). The SAs define the
protocols and algorithms to be applied to sensitive packets and specify the keying material to be
used. SAs are unidirectional and are established per the ESP security protocol. An authorized
administrator can define the traffic that needs to be protected via IPsec by configuring access
lists (permit, deny, log) and applying these access lists to interfaces using crypto map set.
1.7 Excluded Functionality
The following functionality is excluded from the evaluation.
Table 6: Excluded Functionality
Excluded Functionality Exclusion Rationale
Telnet for management purposes Telnet passes authentication credentials in clear
text and is disabled by default.
Secure Policy Manager is excluded from the
evaluated configuration
Use of Security Policy Manager is beyond the
scope of this Common Criteria evaluation.
Filtering of non-IP traffic provided by the
EtherType option when configuring
information flow policies is excluded from the
evaluated configuration
Use of non-IP traffic filtering is beyond the
scope of this Common Criteria evaluation.
Smart Call Home. The Smart Call Home
feature provides personalized, e-mail-based and
web-based notification to customers about
critical events involving their individual
systems.
Use of Smart Call Home is beyond the scope of
this Common Criteria evaluation.
FXOS REST API Allows users to programmatically configure
and manage their chassis. Use of REST API is
beyond the scope of this Common Criteria
evaluation.
These services will be disabled by configuration. The exclusion of this functionality does not
affect compliance to the Protection Profiles: Firewall collaborative Protection Profile4
(FWcPP)
and VPN Gateway Extended Package5
(VPNGWcEP).
4
Also known as the collaborative Protection Profile for Stateful Traffic Filter Firewalls.
Cisco FP 4100 and 9300 Security Target
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5
Also known as the Network Device collaborative Protection Profile (NDcPP) Extended Package VPN Gateway.
Cisco Adaptive Security Appliances Security Target
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2 CONFORMANCE CLAIMS
2.1 Common Criteria Conformance Claim
The TOE and ST are compliant with the Common Criteria (CC) Version 3.1, Revision 4, dated:
September 2012. For a listing of Assurance Requirements claimed see section 5.6.
The TOE and ST are CC Part 2 extended and CC Part 3 conformant.
2.2 Protection Profile Conformance
The TOE and ST are conformant with the Protection Profiles as listed in Table 7 below:
Table 7: Protection Profiles
Protection Profile Version Date
collaborative Protection Profile for Stateful Traffic Filter
Firewalls
1.0 27 February 2015
Network Device collaborative Protection Profile (NDcPP)
Extended Package VPN Gateway
2.1 08 March 2017
2.2.1 Protection Profile Additions or Modifications
The following requirement was modified:
 FAU_GEN.1 – Additional auditable events were added from the VPNGWcEP.
 FMT_SMF.1 – Additional management functions were added to configure VPN settings
from the VPNGWcEP.
2.3 Protection Profile Conformance Claim Rationale
2.3.1 TOE Appropriateness
The TOE provides all of the functionality at a level of security commensurate with that identified
in the:
 Firewall collaborative Protection Profile (FWcPP) and VPN Gateway Extended Package
(VPNGWcEP)
2.3.2 TOE Security Problem Definition Consistency
The Assumptions, Threats, and Organization Security Policies included in the Security Target
represent the Assumptions, Threats, and Organization Security Policies specified in the FWcPP
and VPNGWcEP for which conformance is claimed verbatim. All concepts covered in the
Protection Profile Security Problem Definition are included in the Security Target Statement of
Security Objectives Consistency.
The Security Objectives included in the Security Target represent the Security Objectives
specified in the U.S. Government Protection Profile for Security Requirements for Network
Cisco FP 4100 and 9300 Security Target
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Devices for which conformance is claimed verbatim. All concepts covered in the Protection
Profile’s Statement of Security Objectives are included in the Security Target.
2.3.3 Statement of Security Requirements Consistency
The Security Functional Requirements included in the Security Target represent the Security
Functional Requirements specified in the FWcPP and VPNGWcEP for which conformance is
claimed verbatim and several additional Security Functional Requirements are included as a
result. All concepts covered the Protection Profile’s Statement of Security Requirements are
included in the Security Target. Additionally, the Security Assurance Requirements included in
the Security Target are identical to the Security Assurance Requirements included in section 4.3
of the FWcPP.
Cisco Adaptive Security Appliances Security Target
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3 SECURITY PROBLEM DEFINITION
This chapter identifies the following:
 Significant assumptions about the TOE’s operational environment.
 IT related threats to the organization countered by the TOE.
 Environmental threats requiring controls to provide sufficient protection.
 Organizational security policies for the TOE as appropriate.
This document identifies assumptions as A.assumption with “assumption” specifying a unique
name. Threats are identified as T.threat with “threat” specifying a unique name. Organizational
Security Policies (OSPs) are identified as P.osp with “osp” specifying a unique name. In
addition, threats copied verbatim from the VPNGWcEP will have extension [VPN] to distinguish
them from the FWcPP.
3.1 Assumptions
The specific conditions listed in the following subsections are assumed to exist in the TOE’s
environment. These assumptions include both practical realities in the development of the TOE
security requirements and the essential environmental conditions on the use of the TOE.
Table 8 TOE Assumptions
Assumption Assumption Definition
Reproduced from the FWcPP
A.PHYSICAL_PROTECTION The firewall is assumed to be physically protected in its
operational environment and not subject to physical attacks that
compromise the security and/or interfere with the firewall’s
physical interconnections and correct operation. This protection is
assumed to be sufficient to protect the firewall and the data it
contains. As a result, the cPP will not include any requirements on
physical tamper protection or other physical attack mitigations.
The cPP will not expect the product to defend against physical
access to the firewall that allows unauthorized entities to extract
data, bypass other controls, or otherwise manipulate the firewall.
A.LIMITED_FUNCTIONALITY The firewall is assumed to provide networking and filtering
functionality as its core function and not provide
functionality/services that could be deemed as general purpose
computing. For example the firewall should not provide
computing platform for general purpose applications (unrelated to
networking/filtering functionality).
A.TRUSTED_ADMINSTRATOR The authorized administrator(s) for the firewall are assumed to be
trusted and to act in the best interest of security for the
organization. This includes being appropriately trained, following
policy, and adhering to guidance documentation. Administrators
are trusted to ensure passwords/credentials have sufficient
strength and entropy and to lack malicious intent when
administering the firewall. The firewall is not expected to be
capable of defending against a malicious administrator that
actively works to bypass or compromise the security of the
Cisco FP 4100 and 9300 Security Target
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Assumption Assumption Definition
firewall.
A.REGULAR_UPDATES The firewall firmware and software is assumed to be updated by
an administrator on a regular basis in response to the release of
product updates due to known vulnerabilities.
A.ADMIN_CREDENTIALS_
SECURE
The administrator’s credentials (private key) used to access the
firewall are protected by the host platform on which they reside.
Reproduced from the VPNGWcEP
A.CONNECTIONS It is assumed that the TOE is connected to distinct networks in a
manner that ensures that the TOE security policies will be
enforced on all applicable network traffic flowing among the
attached networks.
3.2 Threats
The following table lists the threats addressed by the TOE and the IT Environment. The
assumed level of expertise of the attacker for all the threats identified below is Enhanced-Basic.
Table 9 Threats
Threat Threat Definition
Reproduced from the FWcPP
T.UNAUTHORIZED_
ADMINISTRATOR_ACCESS
Threat agents may attempt to gain administrator access to
the firewall by nefarious means such as masquerading as an
administrator to the firewall, masquerading as the firewall
to an administrator, replaying an administrative session (in
its entirety, or selected portions), or performing man-in-the-
middle attacks, which would provide access to the
administrative session, or sessions between the firewall and
a network device. Successfully gaining administrator
access allows malicious actions that compromise the
security functionality of the firewall and the network on
which it resides.
T.WEAK_CRYPTOGRAPHY Threat agents may exploit weak cryptographic algorithms
or perform a cryptographic exhaust against the key space.
Poorly chosen encryption algorithms, modes, and key sizes
will allow attackers to compromise the algorithms, or brute
force exhaust the key space and give them unauthorized
access allowing them to read, manipulate and/or control the
traffic with minimal effort.
T.UNTRUSTED_COMMUNICATIONS
_CHANNELS
Threat agents may attempt to target firewalls that do not
use standardized secure tunneling protocols to protect the
critical network traffic. Attackers may take advantage of
poorly designed protocols or poor key management to
successfully perform man-in-the-middle attacks, replay
attacks, etc. Successful attacks will result in loss of
confidentiality and integrity of the critical network traffic,
and potentially could lead to a compromise of the firewall
itself.
Cisco Adaptive Security Appliances Security Target
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Threat Threat Definition
T.WEAK_AUTHENTICATION_
ENDPOINTS
Threat agents may take advantage of secure protocols that
use weak methods to authenticate the endpoints – e.g.,
shared password that is guessable or transported as
plaintext. The consequences are the same as a poorly
designed protocol, the attacker could masquerade as
the administrator or another device, and the attacker could
insert themselves into the network stream and perform a
man-in-the-middle attack. The result is the critical network
traffic is exposed and there could be a loss of
confidentiality and integrity, and potentially the firewall
itself could be compromised.
T.UPDATE_COMPROMISE Threat agents may attempt to provide a compromised
update of the software or firmware which undermines the
security functionality of the device. Non-validated updates
or updates validated using non-secure or weak
cryptography leave the update firmware vulnerable to
surreptitious alteration.
T.UNDETECTED_ACTIVITY Threat agents may attempt to access, change, and/or modify
the security functionality of the firewall without
administrator awareness. This could result in the attacker
finding an avenue (e.g., misconfiguration, flaw in the
product) to compromise the device and the administrator
would have no knowledge that the device has been
compromised.
T.SECURITY_FUNCTIONALITY_
COMPROMISE
Threat agents may compromise credentials and firewall
data enabling continued access to the firewall and its
critical data. The compromise of credentials include
replacing existing credentials with an attacker’s credentials,
modifying existing credentials, or obtaining the
administrator or firewall credentials for use by the attacker.
T.PASSWORD_CRACKING Threat agents may be able to take advantage of weak
administrative passwords to gain privileged access to the
firewall. Having privileged access to the firewall provides
the attacker unfettered access to the network traffic, and
may allow them to take advantage of any trust relationships
with other network devices.
T.SECURITY_FUNCTIONALITY_
FAILURE
A component of the firewall may fail during start-up or
during operations causing a compromise or failure in the
security functionality of the firewall, leaving the firewall
susceptible to attackers.
T.NETWORK_DISCLOSURE An attacker may attempt to “map” a subnet to determine
the machines that reside on the network, and obtaining the
IP addresses of machines, as well as the services (ports)
those machines are offering. This information could be
used to mount attacks to those machines via the services
that are exported.
T.NETWORK_ACCESS With knowledge of the services that are exported by
machines on a subnet, an attacker may attempt to exploit
those services by mounting attacks against those services.
Cisco FP 4100 and 9300 Security Target
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Threat Threat Definition
T.NETWORK_MISUSE An attacker may attempt to use services that are exported
by machines in a way that is unintended by a site’s security
policies. For example, an attacker might be able to use a
service to “anonymize” the attacker’s machine as they
mount attacks against others.
T.MALICIOUS_TRAFFIC An attacker may attempt to send malformed packets to a
machine in hopes of causing the network stack or services
listening on UDP/TCP ports of the target machine to crash.
Reproduced from the VPNGWcEP
T.NETWORK_DISCLOSURE[VPN] Devices on a protected network may be exposed to threats
presented by devices located outside the protected network,
which may attempt to conduct unauthorized activities. If
known malicious external devices are able to communicate
with devices on the protected network, or if devices on the
protected network can establish communications with those
external devices (e.g., as a result of a phishing episode or
by inadvertent responses to email messages), then those
internal devices may be susceptible to the unauthorized
disclosure of information.
From an infiltration perspective, VPN gateways serve not
only to limit access to only specific destination network
addresses and ports within a protected network, but
whether network traffic will be encrypted or transmitted in
plaintext. With these limits, general network port scanning
can be prevented from reaching protected networks or
machines, and access to information on a protected network
can be limited to that obtainable from specifically
configured ports on identified network nodes (e.g., web
pages from a designated corporate web server).
Additionally, access can be limited to only specific source
addresses and ports so that specific networks or network
nodes can be blocked from accessing a protected network
thereby further limiting the potential disclosure of
information.
From an exfiltration perspective, VPN gateways serve to
limit how network nodes operating on a protected network
can connect to and communicate with other networks
limiting how and where they can disseminate information.
Specific external networks can be blocked altogether or
egress could be limited to specific addresses and/or ports.
Alternately, egress options available to network nodes on a
protected network can be carefully managed in order to, for
example, ensure that outgoing connections are encrypted to
further mitigate inappropriate disclosure of data through
packet sniffing.
Cisco Adaptive Security Appliances Security Target
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Threat Threat Definition
T. NETWORK_ACCESS[VPN] Devices located outside the protected network may seek to
exercise services located on the protected network that are
intended to only be accessed from inside the protected
network or only accessed by entities using an authenticated
path into the protected network. Devices located outside the
protected network may, likewise, offer services that are
inappropriate for access from within the protected network.
From an ingress perspective, VPN gateways can be
configured so that only those network servers intended for
external consumption by entities operating on a trusted
network (e.g., machines operating on a network where the
peer VPN gateways are supporting the connection) are
accessible and only via the intended ports. This serves to
mitigate the potential for network entities outside a
protected network to access network servers or services
intended only for consumption or access inside a protected
network.
From an egress perspective, VPN gateways can be
configured so that only specific external services (e.g.,
based on destination port) can be accessed from within a
protected network, or moreover are accessed via an
encrypted channel. For example, access to external mail
services can be blocked to enforce corporate policies
against accessing uncontrolled e-mail servers, or, that
access to the mail server must be done over an encrypted
link.
Cisco FP 4100 and 9300 Security Target
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Threat Threat Definition
T.NETWORK_MISUSE[VPN] Devices located outside the protected network, while
permitted to access particular public services offered inside
the protected network, may attempt to conduct
inappropriate activities while communicating with those
allowed public services. Certain services offered from
within a protected network may also represent a risk when
accessed from outside the protected network.
From an ingress perspective, it is generally assumed that
entities operating on external networks are not bound by
the use policies for a given protected network. Nonetheless,
VPN gateways can log policy violations that might indicate
violation of publicized usage statements for publicly
available services.
From an egress perspective, VPN gateways can be
configured to help enforce and monitor protected network
use policies. As explained in the other threats, a VPN
gateway can serve to limit dissemination of data, access to
external servers, and even disruption of services – all of
these could be related to the use policies of a protected
network and as such are subject in some regards to
enforcement. Additionally, VPN gateways can be
configured to log network usages that cross between
protected and external networks and as a result can serve to
identify potential usage policy violations.
T.DATA_INTEGRITY[VPN] Devices on a protected network may be exposed to threats
presented by devices located outside the protected network,
which may attempt to modify the data without
authorization. If known malicious external devices are able
to communicate with devices on the protected network or if
devices on the protected network can establish
communications with those external devices then the data
contained within the communications may be susceptible to
a loss of integrity.
Cisco Adaptive Security Appliances Security Target
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Threat Threat Definition
T.REPLAY_ATTACK[VPN] If an unauthorized individual successfully gains access to
the system, the adversary may have the opportunity to
conduct a “replay” attack. This method of attack allows the
individual to capture packets traversing throughout the
network and send the packets at a later time, possibly
unknown by the intended receiver. Traffic is subject to
replay if it meets the following conditions:
 Cleartext: an attacker with the ability to view
unencrypted traffic can identify an appropriate
segment of the communications to replay as well in
order to cause the desired outcome.
 No integrity: alongside cleartext traffic, an attacker
can make arbitrary modifications to captured traffic
and replay it to cause the desired outcome if the
recipient has no means to detect these
modifications.
3.3 Organizational Security Policies
The following table lists the Organizational Security Policies imposed by an organization to
address its security needs.
Table 10 Organizational Security Policies
Policy Name Policy Definition
Reproduced from the FWcPP
P.ACCESS_BANNER The TOE shall display an initial banner describing restrictions of use, legal
agreements, or any other appropriate information to which users consent by
accessing the TOE.
Cisco FP 4100 and 9300 Security Target
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4 SECURITY OBJECTIVES
This section identifies the security objectives of the TOE and the IT Environment. The security
objectives identify the responsibilities of the TOE and the TOE’s IT environment in meeting the
security needs.
 This document identifies objectives of the TOE as O.objective with objective specifying
a unique name. Objectives that apply to the IT environment are designated as
OE.objective with objective specifying a unique name.
4.1 Security Objectives for the TOE
The following table, Security Objectives for the TOE, identifies the security objectives of the
TOE. These security objectives reflect the stated intent to counter identified threats and/or
comply with any security policies identified. An explanation of the relationship between the
objectives and the threats/policies is provided in the rationale section of this document.
Table 11 Security Objectives for the TOE
TOE Objective TOE Security Objective Definition
Reproduced from the VPNGWcEP
O.CRYPTOGRAPHIC_FUNCTIONS To address the issues associated with unauthorized
disclosure of information, inappropriate access to
services, misuse of services, disruption of services,
and network-based reconnaissance, compliant TOE’s
will implement a cryptographic capabilities. These
capabilities are intended to maintain confidentiality
and allow for detection and modification of data that
is transmitted outside of the TOE.
O.AUTHENTICATION To further address the issues associated with
unauthorized disclosure of information, a compliant
TOE’s authentication ability (IPSec) will allow a
VPN peer to establish VPN connectivity with another
VPN peer. VPN endpoints authenticate each other to
ensure they are communicating with an authorized
external IT entity.
O.ADDRESS_FILTERING To address the issues associated with unauthorized
disclosure of information, inappropriate access to
services, misuse of services, disruption or denial of
services, and network-based reconnaissance,
compliant TOE’s will implement Packet Filtering
capability. That capability will restrict the flow of
network traffic between protected networks and other
attached networks based on network addresses of the
network nodes originating (source) and/or receiving
(destination) applicable network traffic as well as on
established connection information.
O.FAIL_SECURE There may be instances where the TOE’s hardware
malfunctions or the integrity of the TOE’s software is
compromised, the latter being due to malicious or
Cisco Adaptive Security Appliances Security Target
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TOE Objective TOE Security Objective Definition
non-malicious intent. To address the concern of the
TOE operating outside of its hardware or software
specification, the TOE will shut down upon discovery
of a problem reported via the self-test mechanism and
provide signature-based validation of updates to the
TSF.
O.PORT_FILTERING To further address the issues associated with
unauthorized disclosure of information, etc., a
compliant TOE’s port filtering capability will restrict
the flow of network traffic between protected
networks and other attached networks based on the
originating (source) and/or receiving (destination)
port (or service) identified in the network traffic as
well as on established connection information.
O.SYSTEM_MONITORING To address the issues of administrators being able to
monitor the operations of the VPN gateway, it is
necessary to provide a capability to monitor system
activity. Compliant TOEs will implement the ability
to log the flow of network traffic. Specifically, the
TOE will provide the means for administrators to
configure packet filtering rules to ‘log’ when network
traffic is found to match the configured rule. As a
result, matching a rule configured to ‘log’ will result
in informative event logs whenever a match occurs.
In addition, the establishment of security associations
(SAs) is auditable, not only between peer VPN
gateways, but also with certification authorities
(CAs).
O.TOE_ADMINISTRATION Compliant TOEs will provide the functions necessary
for an administrator to configure the packet filtering
rules, as well as the cryptographic aspects of the
IPsec protocol that are enforced by the TOE.
Cisco FP 4100 and 9300 Security Target
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4.2 Security Objectives for the Environment
All of the assumptions stated in section 3.1 are considered to be security objectives for the
environment. The following are the Protection Profile non-IT security objectives, which, in
addition to those assumptions, are to be satisfied without imposing technical requirements on the
TOE. That is, they will not require the implementation of functions in the TOE hardware and/or
software. Thus, they will be satisfied largely through application of procedural or administrative
measures.
Table 12 Security Objectives for the Environment
Environment Security
Objective
IT Environment Security Objective Definition
Reproduced from the FWcPP
OE.PHYSICAL Physical security, commensurate with the value of the TOE and the
data it contains, is provided by the environment.
OE.NO_GENERAL_PURPOSE There are no general-purpose computing capabilities (e.g.,
compilers or user applications) available on the TOE, other than
those services necessary for the operation, administration and
support of the TOE.
OE.TRUSTED_ADMIN TOE Administrators are trusted to follow and apply all guidance
documentation in a trusted manner.
OE.UPDATES The TOE firmware and software is updated by an administrator on a
regular basis in response to the release of product updates due to
known vulnerabilities.
OE.ADMIN_CREDENTIALS_
SECURE
The administrator’s credentials (private key) used to access the TOE
must be protected on any other platform on which they reside.
Cisco Adaptive Security Appliances Security Target
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5 SECURITY REQUIREMENTS
This section identifies the Security Functional Requirements for the TOE. The Security
Functional Requirements included in this section are derived from Part 2 of the Common Criteria
for Information Technology Security Evaluation, Version 3.1, Revision 4, dated: September 2012
and all international interpretations.
5.1 Conventions
The CC defines operations on Security Functional Requirements: assignments, selections,
assignments within selections and refinements. This document uses the following font
conventions to identify the operations defined by the CC:
 Assignment: Indicated with italicized text;
 Refinement made by PP author: Indicated with bold text;
 Selection: Indicated with underlined text;
 Iteration: Indicated by appending the iteration number in parenthesis, e.g., (1), (2), (3).
 Where operations were completed in the FWcPP or VPNGWcEP itself, the formatting
used in the FWcPP or VPNGWcEP has been retained.
Extended SFRs are identified by having a label ‘EXT’ after the requirement name for TOE
SFRs. Formatting conventions outside of operations and iterations matches the formatting
specified within the PP and EP themselves. In addition, SFRs copied verbatim from the
VPNGWcEP will have extension [VPN] to distinguish them from the FWcPP.
5.2 TOE Security Functional Requirements
This section identifies the Security Functional Requirements for the TOE. The TOE Security
Functional Requirements that appear in the following table are described in more detail in the
following subsections.
Table 13 Security Functional Requirements
Class Name Component
Identification
Component Name
Reproduced from the FWcPP
FAU: Security
Audit
FAU_GEN.1 Audit Data Generation
FAU_GEN.2 User Identity Association
FAU_STG_EXT.1 Protected Audit Event Storage
FCS: Cryptographic
Support
FCS_CKM.1 Cryptographic Key Generation
FCS_CKM.2 Cryptographic Key Establishment
FCS_CKM.4 Cryptographic Key Destruction
FCS_COP.1(1) Cryptographic Operation (AES Data
Encryption/Decryption)
FCS_COP.1(2) Cryptographic Operation (Signature Generation and
Verification)
FCS_COP.1(3) Cryptographic Operation (Hash Algorithm)
FCS_COP.1(4) Cryptographic Operation (Keyed Hash Algorithm)
FCS_HTTPS_EXT.1 HTTPS Protocol
FCS_IPSEC_EXT.1 IPsec Protocol
Cisco FP 4100 and 9300 Security Target
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Class Name Component
Identification
Component Name
FCS_RBG_EXT.1 Random Bit Generation
FCS_SSHS_EXT.1 SSH Server Protocol
FCS_TLSC_EXT.2 TLS Client Protocol with Authentication
FCS_TLSS_EXT.1 TLS Server Protocol
FDP: User Data
Protection
FDP_RIP.2 Full Residual Information Protection
FIA: Identification
and Authentication
FIA_PMG_EXT.1 Password Management
FIA_UIA_EXT.1 User Identification and Authentication
FIA_UAU_EXT.2 Password-based Authentication Mechanism
FIA_UAU.7 Protected Authentication Feedback
FIA_X509_EXT.1 X.509 Certificate Validation
FIA_X509_EXT.2 X.509 Certificate Authentication
FIA_X509_EXT.3 X.509 Certificate Requests
FMT: Security
Management
FMT_MOF.1(1)/
TrustedUpdate
Management of Security Functions Behaviour
FMT_MOF.1(1)/
AdminAct
Management of Security Functions Behaviour
FMT_MOF.1(2)/
AdminAct
Management of Security Functions Behaviour
FMT_MTD.1 Management of TSF Data
FMT_SMF.1 Specification of Management Functions
FMT_SMR.2 Restrictions on Security Roles
FPT: Protection of
the TSF
FPT_SKP_EXT.1 Protection of TSF Data (for Reading of All
Symmetric Keys)
FPT_APW_EXT.1 Protection of Administrator Passwords
FPT_STM.1 Reliable Time Stamps
FPT_TST_EXT.1 TSF Testing
FPT_TUD_EXT.1 Trusted Update
FTA: TOE Access FTA_SSL_EXT.1 TSF-initiated Session Locking
FTA_SSL.3 TSF-initiated Session Termination
FTA_SSL.4 User-initiated Termination
FTA_TAB.1 Default TOE Access Banners
FTP: Trusted
path/channels
FTP_ITC.1 Inter-TSF Trusted Channel
FTP_TRP.1 Trusted Path
FFW: Stateful
Traffic Filtering
FFW_RUL_EXT.1 Stateful Traffic Filtering
FFW_RUL_EXT.2 Stateful Filtering of Dynamic Protocols
Reproduced from the VPNGWcEP
FCS: Cryptographic
Support
FCS_CKM.1/IKE[VPN] Cryptographic Key Generation (for IKE Peer
Authentication)
FCS_COP.1(1)[VPN] Cryptographic Operation (for Data
Encryption/Decryption)
FCS_IPSEC_EXT.1[VPN] Extended: IPsec
FIA: Identification
and Authentication
FIA_AFL.1[VPN] Authentication Failure Handling
FIA_PSK_EXT.1[VPN] Pre-Shared Key Composition
FIA_X509_EXT.4[VPN] X.509 Certificate Identity
FMT: Security FMT_MTD.1/AdminAct Management of TSF Data
Cisco Adaptive Security Appliances Security Target
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Class Name Component
Identification
Component Name
Management [VPN]
FPF: Packet
Filtering
FPF_RUL_EXT.1[VPN] Packet Filtering
FPT: Protection of
the TSF
FPT_FLS.1/SelfTest
[VPN]
Fail Secure
FPT_TST_EXT.2.1
[VPN]
Extended: TSF Testing
FPT_TUD_EXT.1.3
[VPN]
Extended: Trusted Update
FTA: TOE Access FTA_SSL.3[VPN] TSF-initiated Termination
FTA_TSE.1[VPN] TOE Session Establishment
FTA_VCM_EXT.1[VPN] VPN Client Management
FTP: Trusted
path/channels
FTP_ITC.1.1[VPN] Inter-TSF Trusted Channel
5.3 SFRs Drawn from FWcPP
5.3.1 Security audit (FAU)
5.3.1.1 FAU_GEN.1 Audit Data Generation
FAU_GEN.1.1 The TSF shall be able to generate an audit record of the following auditable
events:
a) Start-up and shutdown of the audit functions;
b) All auditable events for the not specified level of audit; and
c) All administrative actions comprising:
 Administrative login and logout (name of user account shall be logged if
individual user accounts are required for administrators).
 Security related configuration changes (in addition to the information that a
change occurred it shall be logged what has been changed).
 Generating/import of, changing, or deleting of cryptographic keys (in addition
to the action itself a unique key name or key reference shall be logged).
 Resetting passwords (name of related user account shall be logged).
 Starting and stopping services (if applicable)
 Selection: [no other actions];
d) Specifically defined auditable events listed in Table 14.
FAU_GEN.1.2 The TSF shall record within each audit record at least the following information:
a) Date and time of the event, type of event, subject identity, and the outcome (success or
failure) of the event; and
b) For each audit event type, based on the auditable event definitions of the functional
components included in the PP/ST, information specified in column three of Table 14.
Table 14 Auditable Events
Cisco FP 4100 and 9300 Security Target
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SFR Auditable Event Additional Audit Record Contents
Reproduced from the FWcPP
FAU_GEN.1 None. None.
FAU_GEN.2 None. None.
FAU_STG_EXT.1 None. None.
FCS_CKM.1 None. None.
FCS_CKM.2 None. None.
FCS_CKM.4 None. None.
FCS_COP.1(1) None. None.
FCS_COP.1(2) None. None.
FCS_COP.1(3) None. None.
FCS_COP.1(4) None. None.
FCS_HTTPS_EXT.1 Failure to establish an HTTPS
session.
Reason for failure
FCS_IPSEC_EXT.1 Failure to establish an IPsec SA. Reason for failure
FCS_RBG_EXT.1 None.
FCS_SSHS_EXT.1 Failure to establish an SSH session Reason for failure
Successful SSH rekey Non-TOE endpoint of connection (IP
address)
FCS_TLSC_EXT.2 Failure to establish an TLS Session Reason for failure
FCS_TLSS_EXT.1 Failure to establish an TLS Session Reason for failure
FDP_RIP.2 None. None.
FIA_PMG_EXT.1 None. None.
FIA_UIA_EXT.1 All use of the identification and
authentication mechanism.
Provided user identity, origin of the
attempt (e.g., IP address).
FIA_UAU_EXT.2 All use of the identification and
authentication mechanism.
Origin of the attempt (e.g., IP address).
FIA_UAU.7 None. None.
FIA_X509_EXT.1 Unsuccessful attempt to validate a
certificate
Reason for failure
FIA_X509_EXT.2 None. None.
FIA_X509_EXT.3 None. None.
FMT_MOF.1(1)/
TrustedUpdate
Any attempt to initiate a manual
update
None.
FMT_MOF.1(1)/
AdminAct
Modification of the behaviour of the
TSF.
None.
FMT_MOF.1(2)/
AdminAct
Starting and stopping of services. None.
FMT_MTD.1 All management activities of TSF
data.
None.
FMT_SMF.1 None. None.
FMT_SMR.2 None. None.
FPT_SKP_EXT.1 None. None.
FPT_APW_EXT.1 None. None.
FPT_TST_EXT.1 None. None.
FPT_TUD_EXT.1 Initiation of update; result of the
update attempt (success or failure)
No additional information.
Cisco Adaptive Security Appliances Security Target
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SFR Auditable Event Additional Audit Record Contents
FPT_STM.1 Changes to the time. The old and new values for the time.
Origin of the attempt to change time for
success and failure (e.g., IP address).
FTA_SSL_EXT.1 Any attempts at unlocking of an
interactive session.
None.
FTA_SSL.3 The termination of a remote session
by the session locking mechanism.
None.
FTA_SSL.4 The termination of an interactive
session.
None.
FTA_TAB.1 None. None.
FTP_ITC.1 Initiation of the trusted channel.
Termination of the trusted channel.
Failure of the trusted channel
functions.
Identification of the initiator and target of
failed trusted channels establishment
attempt
FTP_TRP.1 Initiation of the trusted channel.
Termination of the trusted channel.
Failures of the trusted path
functions.
Identification of the claimed user identity.
FFW_RUL_EXT.1 Application of rules configured
with the ‘log’ operation
Source and destination addresses
Source and destination ports
Transport Layer Protocol
TOE Interface
Indication of packets dropped due
to too much network traffic
TOE interface that is unable to process
packets
Identifier of rule causing packet drop
FFW_RUL_EXT.2 FTP connection The interface where the client resides.
The IP address of the client.
The client port.
The interface where the server resides.
The IP address of the FTP server.
The server port.
The FTP username.
The stored or retrieved actions.
The file stored or retrieved.
Reproduced from the VPNGWcEP
FCS_IPSEC_EXT.1
[VPN]
Session Establishment with peer Entire packet contents of packets
transmitted/received during session
establishment
FIA_X509_EXT.1 Session Establishment with CA Entire packet contents of packets
transmitted/received during session
establishment
FPF_RUL_EXT.1
[VPN]
Application of rules configured
with the ‘log’ operation
Source and destination addresses
Source and destination ports
Transport Layer Protocol
TOE Interface
Cisco FP 4100 and 9300 Security Target
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SFR Auditable Event Additional Audit Record Contents
Indication of packets dropped due
to too much network traffic
TOE interface that is unable to process
packets
5.3.1.2 FAU_GEN.2 User Identity Association
FAU_GEN.2.1 For audit events resulting from actions of identified users, the TSF shall be able
to associate each auditable event with the identity of the user that caused the event.
5.3.1.3 FAU_STG_EXT.1 Protected Audit Event Storage
FAU_STG_EXT.1.1 The TSF shall be able to transmit the generated audit data to an external IT
entity using a trusted channel according to FTP_ITC.1.
FAU_STG_EXT.1.2 The TSF shall be able to store generated audit data on the TOE itself.
FAU_STG_EXT.1.3 The TSF shall [overwrite previous audit records according to the
following rule: [the newest audit record will overwrite the oldest audit record]] when the local
storage space for audit data is full.
5.3.2 Cryptographic Support (FCS)
5.3.2.1 FCS_CKM.1 Cryptographic Key Generation
FCS_CKM.1.1 The TSF shall generate asymmetric cryptographic keys in accordance with a
specified cryptographic key generation algorithm: [
 RSA schemes using cryptographic key sizes of 2048-bit or greater that meet the
following: FIPS PUB 186-4, “Digital Signature Standard (DSS)”, Appendix B.3;
 ECC schemes using “NIST curves” [P-256, P-384, P-521] that meet the following:
FIPS PUB 186-4, “Digital Signature Standard (DSS)”, Appendix B.4
 FFC schemes using cryptographic key sizes of 2048-bit or greater that meet the
following: FIPS PUB 186-4, “Digital Signature Standard (DSS)”, Appendix B.1
] and specified cryptographic key sizes [assignment: cryptographic key sizes] that meet the
following: [assignment: list of standards].
Application Note: Only FXOS supports FFC key generation. ASA supports RFC 3546, section 3.
5.3.2.1 FCS_CKM.2 Cryptographic Key Establishment
FCS_CKM.2.1 The TSF shall perform cryptographic key establishment in accordance with a
specified cryptographic key establishment method: [
Cisco Adaptive Security Appliances Security Target
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 RSA-based key establishment schemes that meets the following: NIST Special
Publication 800-56B, “Recommendation for Pair-Wise Key Establishment Schemes
Using Integer Factorization Cryptography”;
 Elliptic curve-based key establishment schemes that meets the following: NIST
Special Publication 800-56A, “Recommendation for Pair-Wise Key Establishment
Schemes Using Discrete Logarithm Cryptography”
 Finite field-based key establishment schemes that meets the following: NIST
Special Publication 800-56A, “Recommendation for Pair-Wise Key Establishment
Schemes Using Discrete Logarithm Cryptography”
 Key establishment scheme using Diffie-Hellman group 14 that meets the following:
RFC 3526, Section 3
] that meets the following: [assignment: list of standards].
Application Note: Updated per TD0235.
5.3.2.2 FCS_CKM.4 Cryptographic Key Destruction
FCS_CKM.4.1 The TSF shall destroy cryptographic keys in accordance with a specified
cryptographic key destruction method [
• For plaintext keys in volatile storage, the destruction shall be executed by a [single
overwrite consisting of [zeroes]];
• For plaintext keys in non-volatile storage, the destruction shall be executed by the
invocation of an interface provided by a part of the TSF that [
o logically addresses the storage location of the key and performs a [single,
[one]-pass] overwrite consisting of [zeroes];
]
]
that meets the following: No Standard.
Application Note: Updated per TD0130.
5.3.2.3 FCS_COP.1(1) Cryptographic Operation (AES Data Encryption/Decryption)
FCS_COP.1.1(1) The TSF shall perform encryption/decryption in accordance with a specified
cryptographic algorithm AES used in [CBC, GCM] mode and cryptographic key sizes [128 bits,
192 bits, 256 bits] that meet the following: AES as specified in ISO 18033-3, [CBC as specified
in ISO 10116, GCM as specified in ISO 19772].
Application Note: The VPNGWcEP requires that IKE/IPsec used for VPN IPsec tunnel can
support AES in either CBC or GCM mode. SSH only supports AES in CBC mode and with key
sizes 128 and 256 bits (FXOS Only).
Cisco FP 4100 and 9300 Security Target
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5.3.2.4 FCS_COP.1(2) Cryptographic Operation (Signature Generation and Verification)
FCS_COP.1.1(2) The TSF shall perform cryptographic signature services (generation and
verification) in accordance with a specified cryptographic algorithm [
 RSA Digital Signature Algorithm and cryptographic key sizes (modulus) [2048
bits]
 Elliptic Curve Digital Signature Algorithm and cryptographic key sizes [256, 384,
and 521 bits]
]
that meets the following: [
 For RSA schemes: FIPS PUB 186-4, “Digital Signature Standard (DSS)”, Section
5.5, using PKCS #1 v2.1 Signature Schemes RSASSA-PSS and/or RSASSAPKCS2v1_
5; ISO/IEC 9796-2, Digital signature scheme 2 or Digital Signature scheme 3,
 For ECDSA schemes: FIPS PUB 186-4, “Digital Signature Standard (DSS)”, Section
6 and Appendix D, Implementing “NIST curves” [P-256, P-384, and P-521]; ISO/IEC
14888-3, Section 6.4
].
Application Note: IKE/IPsec supports both ECDSA and RSA digital signature. SSH and trusted
update only support RSA digital signature.
Application Note: Updated per TD0199.
5.3.2.5 FCS_COP.1(3) Cryptographic Operation (Hash Algorithm)
FCS_COP.1.1(3) The TSF shall perform cryptographic hashing services in accordance with a
specified cryptographic algorithm [SHA-1, SHA-256, SHA-384, SHA-512] and cryptographic key
sizes [assignment: cryptographic key sizes] that meet the following: ISO/IEC 10118-3:2004.
5.3.2.6 FCS_COP.1(4) Cryptographic Operation (Keyed Hash Algorithm)
FCS_COP.1.1(4) The TSF shall perform keyed-hash message authentication in accordance
with a specified cryptographic algorithm [HMAC-SHA-1, HMAC-SHA-256, HMAC-SHA-384,
HMAC-SHA-512] and cryptographic key sizes [160, 256, and 512 bits] and message digest
sizes [160, 256, 384, 512] bits that meet the following: ISO/IEC 9797-2:2011, Section 7 “MAC
Algorithm 2”.
5.3.2.7 FCS_HTTPS_EXT.1 HTTPS Protocol
FCS_HTTPS_EXT.1.1 The TSF shall implement the HTTPS protocol that complies with RFC
2818.
FCS_HTTPS_EXT.1.2 The TSF shall implement HTTPS using TLS.
Cisco Adaptive Security Appliances Security Target
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FCS_HTTPS_EXT.1.3 The TSF shall establish the connection only if [the peer initiates
handshake].
Application Note: FCS_HTTPS_EXT.1.3 updated per TD0125.
5.3.2.8 FCS_IPSEC_EXT.1 IPsec Procotol
Application Note: The VPNGWcEP’s FCS_IPSEC_EXT.1 takes precedent over the FWcPP.
FCS_IPSEC_EXT.1.1 The TSF shall implement the IPsec architecture as specified in RFC
4301.
FCS_IPSEC_EXT.1.2 The TSF shall have a nominal, final entry in the SPD that matches
anything that is otherwise unmatched, and discards it.
FCS_IPSEC_EXT.1.3[VPN] The TSF shall implement [transport mode, tunnel mode].
Application Note: The VPNGWcEP’s FCS_IPSEC_EXT.1.3 version.
FCS_IPSEC_EXT.1.4[VPN] Refinement: The TSF shall implement the IPsec protocol ESP as
defined by RFC 4303 using the cryptographic algorithms AES-CBC-128, AES-CBC-256 (both
specified by RFC 3602) and AES-GCM-128 (specified in RFC 4106), AES-GCM-256
(specified in RFC 4106) together with a Secure Hash Algorithm (SHA)-based HMAC.
Application Note: The VPNGWcEP’s FCS_IPSEC_EXT.1.4 version.
FCS_IPSEC_EXT.1.5 The TSF shall implement the protocol: [
 IKEv2 as defined in RFC 5996 and [with mandatory support for NAT traversal as
specified in RFC 5996, section 2.23)], and [RFC 4868 for hash functions]
].
Application Note: NAT traversal is only supported on the ASA.
FCS_IPSEC_EXT.1.6 The TSF shall ensure the encrypted payload in the [IKEv2] protocol uses
the cryptographic algorithms AES-CBC-128, AES-CBC-256 as specified in RFC 3602 and
[AES-GCM-128, AES-GCM-256 as specified in RFC 5282].
FCS_IPSEC_EXT.1.7 The TSF shall ensure that [
 IKEv2 SA lifetimes can be configured by an Security Administrator based on
[
o length of time, where the time values can configured within [120 to
2,147,483,647 seconds. The default is 86,400 seconds or 24] hours
]
].
Application Note:IKEv2 SA can be limited by time only. IKEv2 Child SA can be limited by time
or number of kilobytes. The time is in number of seconds.
FCS_IPSEC_EXT.1.8 The TSF shall ensure that [
 IKEv2 Child SA lifetimes can be configured by a Security Administrator based on
Cisco FP 4100 and 9300 Security Target
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[
o number of kilobytes;
o length of time, where the time values can be configured within [120-
2,147,483,647 seconds including 28,800 seconds which is 8] hours;
]
].
Application Note: The valid range in kilobytes is 10-2,147,483,647 (10KB to 2TB).
FCS_IPSEC_EXT.1.9 The TSF shall generate the secret value x used in the IKE Diffie-
Hellman key exchange (“x” in g^x mod p) using the random bit generator specified in
FCS_RBG_EXT.1, and having a length of at least [512] bits.
FCS_IPSEC_EXT.1.10 The TSF shall generate nonces used in [IKEv2] exchanges of length [
at least 128 bits in size and at least half the output size of the negotiated pseudorandom
function (PRF) hash
] .
FCS_IPSEC_EXT.1.11[VPN] The TSF shall ensure that all IKE protocols implement DH
Groups 14 (2048-bit MODP), 19 (256-bit Random ECP), 20 (384-bit Random ECP),
and [24 (2048-bit MODP with 256-bit POS)].
Application Note: Updated based on the TD0209. Only FXOS supports Group 24. Only ASA
supports Groups 19 and 20. Both supports Group 14.
FCS_IPSEC_EXT.1.12 The TSF shall be able to ensure by default that the strength of the
symmetric algorithm (in terms of the number of bits in the key) negotiated to protect the
[IKEv2 IKE_SA] connection is greater than or equal to the strength of the symmetric algorithm
(in terms of the number of bits in the key) negotiated to protect the [IKEv2 CHILD_SA]
connection.
FCS_IPSEC_EXT.1.13 The TSF shall ensure that all IKE protocols perform peer authentication
using [RSA, ECDSA] that use X.509v3 certificates that conform to RFC 4945 and [Pre-shared
Keys].
FCS_IPSEC_EXT.1.14 The TSF shall only establish a trusted channel to peers with valid
certificates.
5.3.2.9 FCS_RBG_EXT.1 Random Bit Generation
FCS_RBG_EXT.1.1 The TSF shall perform all deterministic random bit generation services
in accordance with ISO/IEC 18031:2011 using [Hash_DRBG (any), CTR_DRBG(AES)].
Application Note: The ASA uses Hash_DRBG and FXOS uses CTR_DRBG.
FCS_RBG_EXT.1.2 The deterministic RBG shall be seeded by at least one entropy source
Cisco Adaptive Security Appliances Security Target
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that accumulates entropy from [ [one]software-based noise source, [one] hardware-based noise
source] with a minimum of [256 bits] of entropy at least equal to the greatest security strength,
according to ISO/IEC 18031:2011 Table C.1 “Security Strength Table for Hash Functions”, of
the keys and hashes that it will generate.
Application Note: The ASA and FXOS have different entropy sources. Both entropy sources will
be described in details in the proprietary entropy design documents.
5.3.2.10 FCS_SSHS_EXT.1 SSH Server Protocol
FCS_SSHS_EXT.1.1 The TSF shall implement the SSH protocol that complies with RFCs
4251, 4252, 4253, and 4254, and [no other RFCs].
FCS_SSHS_EXT.1.2 The TSF shall ensure that the SSH protocol implementation supports the
following authentication methods as described in RFC 4252: public key-based, password-based.
FCS_SSHS_EXT.1.3 The TSF shall ensure that, as described in RFC 4253, packets greater than
[65,535 bytes] bytes in an SSH transport connection are dropped.
FCS_SSHS_EXT.1.4 The TSF shall ensure that the SSH transport implementation uses the
following encryption algorithms and rejects all other encryption algorithms: aes128-cbc, aes256-
cbc, [no other algorithms].
FCS_SSHS_EXT.1.5 The TSF shall ensure that the SSH transport implementation uses [ssh-
rsa] and [no other public key algorithms] as its public key algorithm(s) and rejects all other
public key algorithms.
FCS_SSHS_EXT.1.6 The TSF shall ensure that the SSH transport implementation uses [hmac-
sha1, hmac-sha2-256, hmac-sha2-512] and [no other MAC algorithms] as its data integrity
MAC algorithm(s) and rejects all other MAC algorithm(s).
FCS_SSHS_EXT.1.7 The TSF shall ensure that [diffie-hellman-group14-sha1] and [no other
methods] are the only allowed key exchange methods used for the SSH protocol.
FCS_SSHS_EXT.1.8 The TSF shall ensure that within SSH connections the same session keys
are used for a threshold of no longer than one hour, and no more than one gigabyte of transmitted
data. After either of the thresholds are reached a rekey needs to be performed.
Application Note: Only FXOS supports SSH. ASA must tunnel SSH over IPsec.
Application Note: FCS_SSHS_EXT.1.8 has been updated per TD0167.
5.3.2.11 FCS_TLSC_EXT.2 TLS Client Protocol with Authentication
FCS_TLSC_EXT.2.1 The TSF shall implement [TLS 1.2 (RFC 5246), TLS 1.1 (RFC 4346)]
supporting the following ciphersuites:
 Mandatory Ciphersuites:
o TLS_RSA_WITH_AES_128_CBC_SHA as defined in RFC 3268
Cisco FP 4100 and 9300 Security Target
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 [ Optional Ciphersuites:
o TLS_RSA_WITH_AES_256_CBC_SHA as defined in RFC 3268
o TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined in RFC 3268
o TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined in RFC 3268
o TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC 5246
o TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC 5246
o TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC 5246
o TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC 5246
o TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 as defined in RFC
5289
o TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 as defined in RFC
5289].
Application Note: TLSv1.2 supports all the ciphersuites listed. TLSv1.1 only supports the
ciphersuites with SHA. Only FXOS supports TLS Ciphersuites with DHE.
FCS_TLSC_EXT.2.2 The TSF shall verify that the presented identifier matches the
reference identifier according to RFC 6125.
FCS_TLSC_EXT.2.3 The TSF shall only establish a trusted channel if the peer certificate is
valid.
FCS_TLSC_EXT.2.4 The TSF shall present the Supported Elliptic Curves Extension in the
Client Hello with the following NIST curves: [secp256r1, secp384r1, secp521r1] and no other
curves.
FCS_TLSC_EXT.2.5 The TSF shall support mutual authentication using X.509v3
certificates.
5.3.2.12 FCS_TLSS_EXT.1 TLS Server Protocol
FCS_TLSS_EXT.1.1 The TSF shall implement [TLS 1.2 (RFC 5246), TLS 1.1 (RFC 4346)]
supporting the following ciphersuites:
 Mandatory Ciphersuites:
o TLS_RSA_WITH_AES_128_CBC_SHA as defined in RFC 3268
 [ Optional Ciphersuites:
o TLS_RSA_WITH_AES_256_CBC_SHA as defined in RFC 3268
o TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined in RFC 3268
o TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined in RFC 3268
o TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC 5246
o TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC 5246
o TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC 5246
o TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC 5246
o TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 as defined in RFC
5289
Cisco Adaptive Security Appliances Security Target
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o TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 as defined in RFC
5289].
Application Note: TLSv1.2 supports all the ciphersuites listed. TLSv1.1 only supports the
ciphersuites with SHA. Only FXOS supports TLS Ciphersuites with DHE
FCS_TLSS_EXT.1.2 The TSF shall deny connections from clients requesting SSL
2.0, SSL 3.0, TLS 1.0, and [none].
FCS_TLSS_EXT.1.3 The TSF shall generate key establishment parameters using RSA with
key size 2048 bits and [no other size] and [over NIST curves [secp256r1, secp384r1] and no
other curves; Diffie-Hellman parameters of size 2048 bits and [no other size]].
5.3.3 User data protection (FDP)
5.3.3.1 FDP_RIP.2 Full Residual Information Protection
FDP_RIP.2.1 The TSF shall ensure that any previous information content of a resource is made
unavailable upon the [allocation of the resource to] all objects.
5.3.4 Identification and authentication (FIA)
5.3.4.1 FIA_PMG_EXT.1 Password Management
FIA_PMG_EXT.1.1 The TSF shall provide the following password management capabilities
for administrative passwords:
a) Passwords shall be able to be composed of any combination of upper and
lower case letters, numbers, and the following special characters: [“!”,
“@”, “#”, “$”, “%”, “^”, “&”, “*”, “(“, “)”, “ ” ‘ ` (double or single
quote/apostrophe), + (plus), - (minus), = (equal), , (comma), . (period), /
(forward-slash), \ (back-slash), | (vertical-bar or pipe), : (colon), ; (semi-
colon), < > (less-than, greater-than inequality signs), [ ] (square-
brackets), { } (braces or curly-brackets ),^ (caret), _ (underscore), and ~
(tilde)];
b) Minimum password length shall settable by the Security Administrator,
and support passwords of 15 characters or greater.
Application Note: FXOS passwords do not support ?, =, or $.
5.3.4.2 FIA_UIA_EXT.1 User Identification and Authentication
FIA_UIA_EXT.1.1 The TSF shall allow the following actions prior to requiring the non-TOE
entity to initiate the identification and authentication process:
Cisco FP 4100 and 9300 Security Target
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 Display the warning banner in accordance with FTA_TAB.1;
 [no other actions]
FIA_UIA_EXT.1.2 The TSF shall require each administrative user to be successfully
identified and authenticated before allowing any other TSF-mediated action on behalf of that
administrative user.
5.3.4.3 FIA_UAU_EXT.2 Password-based Authentication Mechanism
FIA_UAU_EXT.2.1 The TSF shall provide a local password-based authentication mechanism,
[[support for RADIUS, LDAP, TACACS]] to perform administrative user authentication.
5.3.4.4 FIA_UAU.7 Protected Authentication Feedback
FIA_UAU.7.1 The TSF shall provide only obscured feedback to the administrative user while
the authentication is in progress at the local console.
5.3.4.5 FIA_X509_EXT.1 X.509 Certificate Validation
FIA_X509_EXT.1.1 The TSF shall validate certificates in accordance with the following rules:
 RFC 5280 certificate validation and certificate path validation.
 The certificate path must terminate with a trusted CA certificate.
 The TSF shall validate a certificate path by ensuring the presence of the
basicConstraints extension and that the CA flag is set to TRUE for all CA certificates.
 The TSF shall validate the revocation status of the certificate using [the Online
Certificate Status Protocol (OCSP) as specified in RFC 2560, a Certificate Revocation
List (CRL) as specified in RFC 5759].
 The TSF shall validate the extendedKeyUsage field according to the following rules:
o Certificates used for trusted updates and executable code integrity verification
shall have the Code Signing purpose (id-kp 3 with OID 1.3.6.1.5.5.7.3.3) in the
extendedKeyUsage field.
o Server certificates presented for TLS shall have the Server Authentication
purpose (id-kp 1 with OID 1.3.6.1.5.5.7.3.1) in the extendedKeyUsage field.
o Client certificates presented for TLS shall have the Client Authentication
purpose (id-kp 2 with OID 1.3.6.1.5.5.7.3.2) in the extendedKeyUsage field.
o OCSP certificates presented for OCSP responses shall have the OCSP Signing
purpose (id-kp 9 with OID 1.3.6.1.5.5.7.3.9) in the extendedKeyUsage field.
FIA_X509_EXT.1.2 The TSF shall only treat a certificate as a CA certificate if the
basicConstraints extension is present and the CA flag is set to TRUE.
5.3.4.1 FIA_X509_EXT.2 X.509 Certificate Authentication
FIA_X509_EXT.2.1 The TSF shall use X.509v3 certificates as defined by RFC 5280 to
support authentication for [IPsec, TLS], and [no additional uses].
Cisco Adaptive Security Appliances Security Target
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FIA_X509_EXT.2.2 When the TSF cannot establish a connection to determine the validity
of a certificate, the TSF shall [not accept the certificate].
5.3.4.1 FIA_X509_EXT.3 X.509 Certificate Requests
FIA_X509_EXT.3.1 The TSF shall generate a Certificate Request Message as specified by
RFC 2986 and be able to provide the following information in the request: public key and
[Common Name, Organization, Organizational Unit, Country].
FIA_X509_EXT.3.2 The TSF shall validate the chain of certificates from the Root CA upon
receiving the CA Certificate Response.
5.3.5 Security management (FMT)
5.3.5.1 FMT_MOF.1(1)/TrustedUpdate Management of Security Functions Behaviour
FMT_MOF.1.1(1)/TrustedUpdate The TSF shall restrict the ability to enable the functions
perform manual update to Security Administrators.
5.3.5.1 FMT_MOF.1(1)/AdminAct Management of Security Functions Behaviour
FMT_MOF.1.1(1)/AdminAct The TSF shall restrict the ability to modify the behaviour of the
functions TOE Security Functions to Security Administrators.
5.3.5.1 FMT_MOF.1(2)/AdminAct Management of Security Functions Behaviour
FMT_MOF.1.1(2)/AdminAct The TSF shall restrict the ability to enable, disable the functions
services to Security Administrators.
5.3.5.2 FMT_MTD.1 Management of TSF Data
FMT_MTD.1.1 The TSF shall restrict the ability to manage the TSF data to the Security
Administrators.
5.3.5.3 FMT_SMF.1 Specification of Management Functions
FMT_SMF.1.1 The TSF shall be capable of performing the following management functions:
 Ability to administer the TOE locally and remotely;
 Ability to configure the access banner;
 Ability to configure the session inactivity time before session termination or locking;
 Ability to update the TOE, and to verify the updates using digital signature and [no
other] capability prior to installing those updates;
Cisco FP 4100 and 9300 Security Target
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 Ability to configure firewall rules;
 Ability to configure the cryptographic functionality;
 Ability to configure the IPsec functionality;
 Ability to import X.509v3 certificates;
 Ability to enable, disable, determine and modify the behavior of all the security
functions of the TOE identified in this EP to the Administrator;
 Ability to configure all security management functions identified in other sections of
this EP;
 [
o No other capabilities.]
Application Note: Updated per TD0179.
5.3.5.4 FMT_SMR.2 Restrictions on Security Roles
FMT_SMR.2.1 The TSF shall maintain the roles:
 Security Administrator.
FMT_SMR.2.2 The TSF shall be able to associate users with roles.
FMT_SMR.2.3 The TSF shall ensure that the conditions
 The Security Administrator role shall be able to administer the TOE locally;
 The Security Administrator role shall be able to administer the TOE remotely;
are satisfied.
5.3.6 Protection of the TSF (FPT)
5.3.6.1 FPT_SKP_EXT.1 Protection of TSF Data (for Reading of All Symmetric Keys)
FPT_SKP_EXT.1.1 The TSF shall prevent reading of all pre-shared keys, symmetric keys, and
private keys.
5.3.6.2 FPT_APW_EXT.1 Protection of Administrator Passwords
FPT_APW_EXT.1.1 The TSF shall store passwords in non-plaintext form.
FPT_APW_EXT.1.2 The TSF shall prevent the reading of plaintext passwords.
5.3.6.3 FPT_STM.1 Reliable time stamps
FPT_STM.1.1 The TSF shall be able to provide reliable time stamps.
Cisco Adaptive Security Appliances Security Target
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5.3.6.4 FPT_TST_EXT.1: TSF Testing
FPT_TST_EXT.1.1 The TSF shall run a suite of the following self-tests [during initial start-up
(on power on)] to demonstrate the correct operation of the TSF: [FIPS 140-2 standard power-up
self-tests and firmware integrity test].
FPT_TST_EXT.2.1[VPN] The TSF shall provide the capability to verify the integrity of stored
TSF executable code when it is loaded for execution through the use of the TSF-provided
cryptographic service specified in FCS_COP.1(2).
5.3.6.5 FPT_TUD_EXT.1 Trusted Update
FPT_TUD_EXT.1.1 The TSF shall provide Security Administrators the ability to query the
currently executing version of the TOE firmware/software and [the most recently installed
version of the TOE firmware/software].
Application Note: FPT_TUD_EXT.1.1 updated per TD0154.
FPT_TUD_EXT.1.2 The TSF shall provide Security Administrators the ability to manually
initiate updates to TOE firmware/software and [no other update mechanism].
FPT_TUD_EXT.1.3[VPN] The TSF shall provide a means to authenticate firmware/software
updates to the TOE using a digital signature mechanism and [no other functions] prior to
installing those updates.
Application Note: The VPNGWcEP’s FPT_TUD_EXT.1.3 version.
5.3.7 TOE Access (FTA)
5.3.7.1 FTA_SSL_EXT.1 TSF-initiated Session Locking
FTA_SSL_EXT.1.1 The TSF shall, for local interactive sessions, [
 terminate the session]
after a Security Administrator-specified time period of inactivity.
5.3.7.2 FTA_SSL.3 TSF-initiated Termination
FTA_SSL.3.1(1) Refinement: The TSF shall terminate a remote interactive session after a
Security Administrator-configurable time interval of session inactivity.
5.3.7.3 FTA_SSL.4 User-initiated Termination
FTA_SSL.4.1 Refinement: The TSF shall allow Administrator-initiated termination of the
Administrator’s own interactive session.
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5.3.7.4 FTA_TAB.1 Default TOE Access Banners
FTA_TAB.1.1 Refinement: Before establishing an administrative user session the TSF shall
display a Security Administrator-specified advisory notice and consent warning message
regarding use of the TOE.
5.3.8 Trusted Path/Channels (FTP)
5.3.8.1 FTP_ITC.1 Inter-TSF Trusted Channel
FTP_ITC.1.1[VPN] The TSF shall use IPsec, and [TLS] to provide a trusted communication
channel between itself and authorized IT entities supporting the following capabilities: audit
server, VPN communications, [authentication server] that is logically distinct from other
communication channels and provides assured identification of its end points and protection of
the channel data from disclosure and detection of modification of the channel data.
Application Note: The VPNGWcEP’s FTP_ITC.1.1 version.
FTP_ITC.1.2 The TSF shall permit the TSF, or the authorized IT entities to initiate
communication via the trusted channel.
FTP_ ITC.1.3 The TSF shall initiate communication via the trusted channel for [
 Audit server: transmit audit data via syslog over IPsec or TLS;
 Authentication server: authentication of TOE administrators using AAA servers including
RADIUS/TACACS+ over IPsec and LDAP over IPsec;
 Remote VPN peer using IPsec;].
5.3.8.2 FTP_TRP.1 Trusted Path
FTP_TRP.1.1 The TSF shall be capable of using [SSH, HTTPS, IPSEC] to provide a
communication path between itself and authorized remote administrators that is logically
distinct from other communication paths and provides assured identification of its end points and
protection of the communicated data from disclosure and detection of modification of the
communicated data.
FTP_TRP.1.2 The TSF shall permit remote administrators to initiate communication via the
trusted path.
FTP_TRP.1.3 The TSF shall require the use of the trusted path for initial administrator
authentication and all remote administration actions.
Cisco Adaptive Security Appliances Security Target
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5.3.9 Stateful Traffic Filtering (FFW)
5.3.9.1 FFW_RUL_EXT.1 Stateful Traffic Filtering
FFW_RUL_EXT.1.1 The TSF shall perform Stateful Traffic Filtering on network packets
processed by the TOE.
FFW_RUL_EXT.1.2 The TSF shall allow the definition of Stateful Traffic Filtering rules using
the following network protocol fields:
 ICMPv4
o Type
o Code
 ICMPv6
o Type
o Code
 IPv4
o Source address
o Destination Address
o Transport Layer Protocol
 IPv6
o Source address
o Destination Address
o Transport Layer Protocol
o [no other field]
 TCP
o Source Port
o Destination Port
 UDP
o Source Port
o Destination Port
 and distinct interface.
FFW_RUL_EXT.1.3 The TSF shall allow the following operations to be associated with
Stateful Traffic Filtering rules: permit or drop with the capability to log the operation.
FFW_RUL_EXT.1.4 The TSF shall allow the Stateful Traffic Filtering rules to be assigned to
each distinct network interface.
FFW_RUL_EXT.1.5 The TSF shall:
a) accept a network packet without further processing of Stateful Traffic Filtering rules if
it matches an allowed established session for the following protocols: TCP, UDP, [no
other protocols] based on the following network packet attributes:
1. TCP: source and destination addresses, source and destination ports, sequence
number, Flags;
2. UDP: source and destination addresses, source and destination ports;
Cisco FP 4100 and 9300 Security Target
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3. [no other protocols].
b) Remove existing traffic flows from the set of established traffic flows based on the
following: [session inactivity timeout, completion of the expected information flow].
FFW_RUL_EXT.1.6 The TSF shall enforce the following default Stateful Traffic Filtering rules
on all network traffic:
a) The TSF shall drop and be capable of [logging] packets which are invalid
fragments;
b) The TSF shall drop and be capable of [logging] fragmented packets which cannot
be re-assembled completely;
c) The TSF shall drop and be capable of logging packets where the source address of
the network packet is defined as being on a broadcast network;
d) The TSF shall drop and be capable of logging packets where the source address of
the network packet is defined as being on a multicast network; The TSF shall drop
and be capable of logging network packets where the source address of the
network packet is defined as being a loopback address;
e) The TSF shall drop and be capable of logging network packets where the source
or destination address of the network packet is defined as being unspecified (i.e.
0.0.0.0) or an address “reserved for future use” (i.e. 240.0.0.0/4) as specified in
RFC 5735 for IPv4;
f) The TSF shall drop and be capable of logging network packets where the source
or destination address of the network packet is defined as an “unspecified
address” or an address “reserved for future definition and use” (i.e. unicast
addresses not in this address range: 2000::/3) as specified in RFC 3513 for IPv6;
g) The TSF shall drop and be capable of logging network packets with the IP
options: Loose Source Routing, Strict Source Routing, or Record Route specified;
and
 [[Other traffic dropped by default and able to be logged:
i. Slowpath Security Checks – The TSF shall reject and be capable of
logging the detection of the following network packets:
1. In routed mode when the TOE receives a through-the-box:
a. L2 broadcast packet (MAC address FF:FF:FF:FF:FF:FF)
b. IPv4 packet with destination IP address equal to 0.0.0.0
c. IPv4 packet with source IP address equal to 0.0.0.0
2. In routed or transparent mode when the TOE receives a through-
the-box IPv4 packet with any of:
a. first octet of the source IP address equal to zero
b. network part of the source IP address equal to all 0's
c. network part of the source IP address equal to all 1's
d. source IP address host part equal to all 0's or all 1's
e. source IP address and destination IP address are the same
(“land.c” attack)
3. IPv6 through-the-box packet with identical source and destination
address.
Cisco Adaptive Security Appliances Security Target
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ii. LAND Attack: The TSF shall reject and be capable of logging network
packets with the IP source address equal to the IP destination, and the
destination port equal to the source port.
iii. ICMP Error Inspect and ICMPv6 Error Inspect - The TSF shall reject and
be capable of logging ICMP error packets when the ICMP error messages
are not related to any session already established in the TOE.
iv. ICMPv6 condition - The TSF shall reject and be capable of logging
network packets when the appliance is not able to find any established
connection related to the frame embedded in the ICMPv6 error message.
v. ICMP Inspect bad icmp code - The TSF shall reject and be capable of
logging network packets when an ICMP echo request/reply packet was
received with a malformed code(non-zero)]].
FFW_RUL_EXT.1.7 The TSF shall be capable of dropping and logging according to the
following rules:
a) The TSF shall drop and be capable of logging network packets where the source
address of the network packet is equal to the address of the network interface where
the network packet was received;
b) The TSF shall drop and be capable of logging network packets where the source or
destination address of the network packet is a link-local address;
c) The TSF shall drop and be capable of logging network packets where the source
address of the network packet does not belong to the networks associated with the
network interface where the network packet was received.
FFW_RUL_EXT.1.8 , The TSF shall process the applicable Stateful Traffic Filtering rules
in an administratively defined order.
FFW_RUL_EXT.1.9 The TSF shall deny packet flow if a matching rule is not identified.
FFW_RUL_EXT.1.10 The TSF shall be capable of limiting an administratively defined
number of half-open TCP connections. In the event that the configured limit is reached, new
connection attempts shall be dropped and the drop event shall be [counted].
5.3.9.1 FFW_RUL_EXT.2 Stateful Filtering of Dynamic Protocols
FFW_RUL_EXT.2.1 The TSF shall dynamically define rules or establish sessions allowing
network traffic to flow for the following network protocols [FTP].
5.4 SFRs from the VPNGWcEP
5.4.1 Cryptographic Support (FCS)
5.4.1.1 FCS_CKM.1/IKE[VPN] Cryptographic Key Generation (for IKE Peer Authentication)
FCS_CKM.1.1/IKE[VPN] Refinement: The TSF shall generate asymmetric cryptographic
keys used for IKE peer authentication in accordance with a: [
Cisco FP 4100 and 9300 Security Target
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 FIPS PUB 186-4, “Digital Signature Standard (DSS)”; Appendix B.3 for RSA
schemes;
 FIPS PUB 186-4, “Digital Signature Standard (DSS)”, Appendix B.4 for ECDSA
schemes and implementing “NIST curves” P-256, P-384 and [P-521]
]
and specified cryptographic key sizes equivalent to, or greater than, a symmetric key strength of
112 bits.
5.4.1.2 FCS_COP.1(1)[VPN] Cryptographic Operation (for Data Encryption/Decryption)
FCS_COP.1.1(1)[VPN] Refinement: The TSF shall perform encryption/ decryption in
accordance with a specified cryptographic algorithm AES operating in GCM, CBC and
cryptographic key sizes 128 bits, 256 bits, and [192 bits] that meet the following: AES as
specified in ISO 18033-3, CBC as specified in ISO 10116, GCM as specified in ISO 19772.
5.4.2 Identification and authentication (FIA)
5.4.2.1 FIA_AFL.1[VPN] Authentication Failure Handling
FIA_AFL.1.1[VPN] Refinement: The TSF shall detect when an Administrator configurable
positive integer of successive unsuccessful authentication attempts occur related to
administrators attempting to authenticate remotely.
FIA_AFL.1.2[VPN] Refinement: When the defined number of unsuccessful authentication
attempts has been met, the TSF shall [prevent the offending remote administrator from
successfully authenticating until [an authorized administrator unlocks the locked user
account (ASA) or 30 minutes has passed by (FXOS)] is taken by a local Administrator].
5.4.2.2 FIA_PSK_EXT.1[VPN] Extended: Pre-Shared Key Composition
FIA_PSK_EXT.1.1[VPN] The TSF shall be able to use pre-shared keys for IPsec and [no other
protocols].
FIA_PSK_EXT.1.2[VPN] The TSF shall be able to accept text-based pre-shared keys that:
 are 22 characters and [[up to 128 characters]];
 composed of any combination of upper and lower case letters, numbers, and special
characters (that include: “!”, “@”, “#”, “$”, “%”, “^”, “&”, “*”, “(“, and “)”).
FIA_PSK_EXT.1.3[VPN] The TSF shall condition the text-based pre-shared keys by using
[[HMAC-SHA1, HMAC-SHA-256, HMAC-SHA384, HMAC-SHA-512]].
FIA_PSK_EXT.1.4[VPN] The TSF shall be able to [accept] bit-based pre-shared keys.
Cisco Adaptive Security Appliances Security Target
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5.4.2.3 FIA_X509_EXT.4[VPN] X.509 Certificate Identity
FIA_X509_EXT.4.1[VPN] The TSF shall not establish an SA if the distinguished name (DN)
contained in a certificate does not match the expected DN for the entity attempting to establish a
connection.
5.4.3 Security management (FMT)
5.4.3.1 FMT_MTD.1/AdminAct[VPN] Management of TSF Data
FMT_MTD.1.1/AdminAct[VPN] Refinement: The TSF shall restrict the ability to modify,
delete, generate/import the cryptographic keys and certificates used for VPN operation to
Security Administrators.
5.4.4 Packeting Filtering (FPF)
5.4.4.1 FPF_RUL_EXT.1 Packet Filtering
FPF_RUL_EXT.1.1 The TSF shall perform Packet Filtering on network packets processed by
the TOE.
FPF_RUL_EXT.1.2 The TSF shall process the following network traffic protocols:
 Internet Protocol (IPv4)
 Internet Protocol version 6 (IPv6)
 Transmission Control Protocol (TCP)
 User Datagram Protocol (UDP)
and be capable of inspecting network packet header fields defined by the following RFCs to the
extent mandated in the other elements of this SFR
 RFC 791 (IPv4)
 RFC 2460 (IPv6)
 RFC 793 (TCP)
 RFC 768 (UDP).
FPF_RUL_EXT.1.3 The TSF shall allow the definition of Packet Filtering rules using the
following network protocol fields:
 IPv4
o Source address
o Destination Address
o Protocol
 IPv6
o Source address
Cisco FP 4100 and 9300 Security Target
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o Destination Address
o Next Header (Protocol)
 TCP
o Source Port
o Destination Port
 UDP
o Source Port
o Destination Port
and distinct interface.
FPF_RUL_EXT.1.4 The TSF shall allow the following operations to be associated with Packet
Traffic Filtering rules: permit, deny, discard, and log.
FPF_RUL_EXT.1.5 The TSF shall allow the Packet Traffic Filtering rules to be assigned to
each distinct network interface.
FPF_RUL_EXT.1.6 The TSF shall process the applicable Packet Filtering rules (as determined
in accordance with FPF_RUL_EXT.1.5) in the following order: Administrator-defined.
FPF_RUL_EXT.1.7 The TSF shall deny packet flow if a matching rule is not identified.
5.4.5 Protection of the TSF (FPT)
5.4.5.1 FPT_FLS.1/SelfTest[VPN] Fail Secure
FPT_FLS.1.1/SelfTest[VPN] Refinement: The TSF shall shutdown when the following types
of failures occur: failure of the power-on self-tests, failure of integrity check of the TSF
executable image, failure of noise source health tests.
5.4.6 TOE Access (FTA)
5.4.6.1 FTA_SSL.3[VPN] TSF-initiated Termination
FTA_SSL.3.1[VPN] Refinement: The TSF shall terminate a remote VPN client session after
an Administrator-configurable time interval of session inactivity.
5.4.6.2 FTA_TSE.1[VPN] TOE Session Establishment
FTA_TSE.1.1[VPN] Refinement: The TSF shall be able to deny establishment of a remote
VPN client session based on location, time, day, [no other attributes].
Cisco Adaptive Security Appliances Security Target
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5.4.6.3 FTA_VCM_EXT.1[VPN] VPN Client Management
FTA_VCM_EXT.1.1[VPN] The TSF shall assign a private IP address to a VPN client upon
successful establishment of a security session.
5.5 TOE SFR Dependencies Rationale for SFRs Found in FWcPP
The FWcPPv1.0 contains all the requirements claimed in this Security Target. As such the
dependencies are not applicable since the PP itself has been approved.
5.6 Security Assurance Requirements
5.6.1 SAR Requirements
The TOE assurance requirements for this ST are taken directly from the FWcPP which are
derived from Common Criteria Version 3.1, Revision 4. The assurance requirements are
summarized in the table below.
Table 15: Assurance Measures
Assurance Class Components Components Description
DEVELOPMENT ADV_FSP.1 Basic Functional Specification
GUIDANCE
DOCUMENTS
AGD_OPE.1 Operational User Guidance
AGD_PRE.1 Preparative User Guidance
LIFE CYCLE SUPPORT ALC_CMC.1 Labeling of the TOE
ALC_CMS.1 TOE CM Coverage
TESTS ATE_IND.1 Independent Testing - Conformance
VULNERABILITY
ASSESSMENT
AVA_VAN.1 Vulnerability Analysis
5.6.2 Security Assurance Requirements Rationale
This Security Target claims conformance to the FWcPP. This target was chosen to ensure that
the TOE has a basic to moderate level of assurance in enforcing its security functions when
instantiated in its intended environment which imposes no restrictions on assumed activity on
applicable networks. The ST also claims conformance to the VPNGWcEP, which includes
refinements to assurance measures for the SFRs defined in the VPNGWcEP, including
augmenting the vulnerability analysis (AVA_VAN.1) with specific vulnerability testing.
5.7 Assurance Measures
The TOE satisfies the identified assurance requirements. This section identifies the Assurance
Measures applied by Cisco to satisfy the assurance requirements. The table below lists the
details.
Table 16: Assurance Measures
Component How requirement will be met
Cisco FP 4100 and 9300 Security Target
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Component How requirement will be met
ADV_FSP.1 The functional specification describes the external interfaces of the TOE; such as the
means for a user to invoke a service and the corresponding response of those services.
The description includes the interface(s) that enforces a security functional
requirement, the interface(s) that supports the enforcement of a security functional
requirement, and the interface(s) that does not enforce any security functional
requirements. The interfaces are described in terms of their purpose (general goal of
the interface), method of use (how the interface is to be used), parameters (explicit
inputs to and outputs from an interface that control the behavior of that interface),
parameter descriptions (tells what the parameter is in some meaningful way), and
error messages (identifies the condition that generated it, what the message is, and the
meaning of any error codes). The development evidence also contains a tracing of the
interfaces to the SFRs described in this ST.
AGD_OPE.1 The Administrative Guide provides the descriptions of the processes and procedures
of how the administrative users of the TOE can securely administer the TOE using the
interfaces that provide the features and functions detailed in the guidance.
AGD_PRE.1 The Installation Guide describes the installation, generation, and startup procedures so
that the users of the TOE can put the components of the TOE in the evaluated
configuration.
ALC_CMC.1 The Configuration Management (CM) document(s) describes how the consumer (end-
user) of the TOE can identify the evaluated TOE (Target of Evaluation). The CM
document(s), identifies the configuration items, how those configuration items are
uniquely identified, and the adequacy of the procedures that are used to control and
track changes that are made to the TOE. This includes details on what changes are
tracked, how potential changes are incorporated, and the degree to which automation
is used to reduce the scope for error.
ALC_CMS.1
ATE_IND.1 Cisco provides the TOE for testing.
AVA_VAN.1 Cisco provides the TOE for testing.
Cisco Adaptive Security Appliances Security Target
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6 TOE SUMMARY SPECIFICATION
6.1 TOE Security Functional Requirement Measures
This chapter identifies and describes how the Security Functional Requirements identified above
are met by the TOE.
Table 17: How TOE SFRs Are Satisfied
TOE SFRs How the SFR is Satisfied
Security Functional Requirements Drawn from FWcPP
FAU_GEN.1 Shutdown and start-up of the audit functions on the ASA are logged by events
for reloading the TOE, and the events when the TOE comes back up. When
audit is enabled, it is on whenever the ASA is on. Also, if logging is ever
disabled, it is displayed in the ASDM Real-Time Log Viewer as a syslog
disconnection and then a reconnection once it is re-established followed by an
event that shows that the "logging enable" command was executed. FXOS can
enable or disable logging of all audit events. See the table within this cell for
other required events and rationale.
The TOE generates events in the following format, with fields for date and time,
type of event (the ASA-x-xxxxxx identifier code or ID), subject identities, and
outcome of the event (examples below):
ASA
Nov 21 2012 20:39:21: %ASA-3-713194: Group = 192.168.22.1, IP =
192.168.22.1, Sending IKE Delete With Reason message: Disconnected by
Administrator.
FXOS
Creation Time: 2015-07-09T08:20:17.030
User: internal
Session ID: internal
ID: 3330860
Action: Creation
Description: Fabric A: local user admin logged in from 172.23.33.113
Affected Object: sys/user-ext/sh-login-admin-pts_5_1_15135
Trigger: Session
Modified Properties: id:pts_5_1_15135, name:admin, policyOwner:local
Network interfaces have bandwidth limitations, and other traffic flow
limitations that are configurable. When an interface has exceeded a limit for
processing traffic, traffic will be dropped, and audit messages can be generated,
such as:
Nov 21 2012 20:39:21: %ASA-3-201011: Connection limit exceeded cnt/limit
for dir packet from sip/sport to dip/dport on interface if_name.
Nov 21 2012 20:39:21: %ASA-3-202011: Connection limit exceeded
Cisco FP 4100 and 9300 Security Target
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TOE SFRs How the SFR is Satisfied
econns/limit for dir packet from source_address/source_port to
dest_address/dest_port on interface interface_name
For more information on the required auditable events and the actual logs
themselves, please refer to the Preparative Procedures & Operational User
Guide for the Common Criteria Certified Configuration.
The following high-level events are auditable by the TOE:
Auditable Event Rationale
Modifications to the
group of users that are
part of the authorized
administrator role.
All changes to the configuration (and hence
all security relevant administrator actions)
are logged when the logging level is set to at
least the 'notifications' level. These changes
would fall into the category of configuration
changes such as enabling or disabling
features and services. The identity of the
administrator taking the action and the user
being affected (assigned to the authorized
administrator role) are both included within
the event.
All use of the user
identification mechanism.
Events will be generated for attempted
identification/ authentication, and the
username attempting to authenticate will be
recorded in the event.
Any use of the
authentication
mechanism.
Events will be generated for attempted
identification/ authentication, and the
username attempting to authenticate will be
recorded in the event along with the origin or
source of the attempt.
The reaching of the
threshold for
unsuccessful
authentication attempts
and the subsequent
restoration by the
authorized administrator
of the user’s capability to
authenticate.
Failed attempts for authentication will be
logged, and when the threshold is reached, it
will also be logged.
All changes to the configuration are logged
when the logging level is set to at least the
'notifications' level. Changes to restore a
locked account would fall into the category
of configuration changes.
All decisions on requests
for information flow.
In order for events to be logged for
information flow requests, the 'log' keyword
may need to be in each line of an access
control list. The presumed addresses of the
source and destination subjects are included
in the event.
Success and failure, and
the type of cryptographic
Attempts for VPN connections are logged
(whether successful or failed). Requests for
Cisco Adaptive Security Appliances Security Target
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TOE SFRs How the SFR is Satisfied
operation encrypted session negotiation are logged
(whether successful or failed). The identity
of the user performing the cryptographic
operation is included in the event.
Failure to establish
and/or
establishment/termination
of an IPsec session
Attempts to establish an IPsec tunnel or the
failure of an established IPsec tunnel is
logged as well as successfully established
and terminated IPsec sessions with peer.
Establishing session with
CA and IPsec peer
The connection to CA’s or any other entity
(e.g., CDP) for the purpose of certificate
verification or revocation check is logged. In
addition, the TOE can be configured to
capture the packets’ contents during the
session establishment.
Changes to the time. Changes to the time are logged with old and
new time values.
Use of the functions
listed in this requirement
pertaining to audit.
All changes to the configuration are logged
when the logging level is set to at least the
'notifications' level. These changes would
fall into the category of configuration
changes.
Loss of connectivity with
an external syslog server.
Loss of connectivity with an external syslog
server is logged as a terminated or failed
cryptographic channel.
Initiation of an update to
the TOE.
TOE updates are logged as configuration
changes.
Termination of local and
remote sessions.
Note that the TOE does
not support session
locking, so there is no
corresponding audit.
Termination of a local and remote session is
logged. This also includes termination of
remote VPN session as well. The user may
initiate or the system may terminate the
session based idle timeout setting.
Initiation, termination
and failures in trusted
channels and paths.
Requests for encrypted session negotiation
are logged (whether successful or failed).
Similarly, when an established cryptographic
channel or path is terminated or fails a log
record is generated. This applies to HTTPS,
TLS, IPsec, and SSH.
Successful SSH rekey SSH rekey event is logged.
Cisco FP 4100 and 9300 Security Target
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TOE SFRs How the SFR is Satisfied
Application of rules
configured with the ‘log’
operation
Logs are generated when traffic matches
ACLs that are configured with the log
operation.
Indication of packets
dropped due to too much
network traffic
Logs are generated when traffic that exceeds
the settings allowed on an interface is
received.
FAU_GEN.2 The TOE ensures each action performed by the administrator at the CLI (both ASA
and FXOS), or via ASDM (ASA) and web GUI (FXOS) is logged with the
administrator’s identity and as a result events are traceable to a specific user.
FAU_STG_EXT.1 The TOE can be configured to export syslog records to an administrator-
specified, external syslog server. The TOE can be configured to encrypt the
communications with an external syslog server using IPsec or TLS.
If using syslog through an IPsec tunnel, the TOE can be configured to block any new
‘permit’ actions that might occur. In other words, it can be configured to stop
forwarding network traffic when it discovers it can no longer communicate with its
configured syslog server(s).
The ASA will buffer syslog messages locally, but the local buffer will be cleared
when the ASA is rebooted. The default size of the buffer is 4KB on the ASA, and
can be increased to 16KB (ASA) and 4 MB (FXOS). When the local buffer is full,
the oldest message will be overwritten with new messages on ASA and FXOS. Only
authorized administrators can configure the local buffer size, reboot the TOE, and
configure the external syslog server.
FCS_CKM.1,
FCS_CKM.2,
FCS_CKM.4,
FCS_COP.1(1),
FCS_COP.1(2),
FCS_COP.1(3),
FCS_COP.1(4), and
FCS_RBG_EXT.1
ASA
In the TOE cryptographic functions are used to establish TLS, HTTPS, IPsec, and
SSH (over IPsec) sessions, for IPsec traffic and authentication keys, and for IKE
authentication and encryption keys.
Key generation for asymmetric keys on all models of the TOE implements ECDSA
with NIST curve sizes P-256, P-384, and P-521 according to FIPS PUB 186-4
(implements only required functions), “Digital Signature Standard (DSS)”,
Appendix B.4 and RSA with key size 2048 bits according to FIPS PUB 186-4,
“Digital Signature Standard (DSS)”, Appendix B.3.
Key establishment for asymmetric keys on all models of the TOE implements
ECDSA-based key establishment scheme as specified in NIST SP 800-56A
“Recommendation for Pair-Wise Key Establishment Schemes Using Discrete
Logarithm Cryptography” and RSA-based key establishment schemes as specified in
NIST SP 800-56B “Recommendation for Pair-Wise Key Establishment Schemes
Using Integer Factorization Cryptography” with key sizes greater than 112 bit key
strength. In addition, ASA supports RFC 3526, Section 3 domain parameters. Note
that IPsec and TLS protocols can use either ECDSA or RSA.
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The TOE meets all requirements specified in FIPS 140-2 for destruction of keys and
Critical Security Parameters (CSPs) with the added feature of read-verify.
Additional key zeroization detail is provided in section 7.2. An example of manually
triggering zeroization is: existing RSA and ECDSA keys will be zeroized when new
RSA and ECDSA keys are generated, and zeroization of RSA and ECDSA keys can
be triggered manually through use of the commands:
asa(config)#crypto key zeroize rsa [label key-pair-label] [default] [noconfirm]
asa(config)#crypto key zeroize ec [label key-pair-label]
The TOE supports AES-CBC and AES-GCM, each with 128, 192, or 256-bit (as
described in NIST SP 800-38A and 800-38D). The TOE uses a FIPS-validated
implementation of AES with 128, 192, and 256 bit keys. Configuring the TOE
software in or out of FIPS mode does not modify the TOE’s use of the FIPS-
validated AES.
 AES #4249 (maps to FCS_COP.1(1))
The TOE provides cryptographic signature services using RSA and ECDSA with
key sizes (modulus) of 2048 bits, and 256, 384, and 521 bits, respectively. For RSA,
the key size is configurable down to 1024, but only 2048 key size is permitted in the
evaluated configuration.
 RSA #2298 and ECDSA #989 (maps to FCS_CKM.1 and FCS_COP.1(2))
The TOE supports key establishment including ECDSA-based scheme and RSA-
based schemes. The RSA-based implementation is vendor affirmation and the ECC
KAS CVL algorithm testing is provided below:
 ECC CVL #1002 and #1134 (maps to FCS_CKM.2)
The TOE provides cryptographic hashing services using SHA-1, SHA-256, SHA-
384, and SHA-512, and keyed-hash message authentication using HMAC-SHA-1
(160-bit), HMAC-SHA-256 (256-bit), HMAC-SHA-384 (384-bit), and HMAC-
SHA-512 (512-bit).
 SHA #3486 and HMAC #2787 (maps to FCS_COP.1(3) and
FCS_COP.1(4))
Random number generation in the TOE uses different methods depending on the
underlying hardware. The DRBG used by ASA is Hash_DRBG (SHA-512). More
information is provided in the entropy design documentation.
 RBG #1328 (maps to FCS_RBG_EXT.1)
FXOS
The TOE utilizes a cryptographic module (i.e., Cisco FIPS Object Module)
providing supporting cryptographic functions. The algorithm implementations have
been tested in accordance to validation suites set by the Cryptographic Algorithm
Validation Program (CAVP). The following algorithms have been FIPS validated in
accordance with the identified standards:
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Table 18: CAVP Algorithms
Algorithms Standards Certificate
Numbers
SFR
Asymmetric Key Generation
 Domain parameter
generation
NIST Special
Publication 800-
56B
NIST Special
Publication 800-57
See DRBG
below.
See below
 Random number
generation
See DRBG below
Encryption/Decryption
 AES (128 and 256
bits) in CBC and
GCM mode
FIPS PUB 197
NIST SP 800-38A
NIST SP 800-38D
AES #4307 FCS_COP.1(1)
Cryptographic Signature Services
 RSA Digital
Signature
Algorithm (rDSA)
(modulus 2048)
FIPS PUB 186-4 RSA #2328 FCS_CKM.1
FCS_COP.1(2)
Cryptographic Hashing
 SHA-1, SHA-256,
SHA-384, and
SHA-512 (digest
sizes 160, 256, 384
and 512 bits)
FIPS PUB 180-4 SHA #3546 FCS_COP.1(3)
Keyed-hash Message Authentication
 HMAC-SHA-1,
HMAC-SHA-256,
HMAC-SHA-384,
and HMAC-SHA-
512 (message
digest sizes 160,
256, 384, and 512
FIPS PUB 198-1
FIPS PUB 180-4
HMAC
#2843
FCS_COP.1(4)
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bits)
Deterministic Random Bit Generation (DRBG)
 DRBG NIST 800-90 DRBG
#1368
FCS_RBG-
_EXT.1
Key Establishment
 RSA (vendor
affirm)
 ECC
 FFC
NIST 800-56B
NIST 800-56A
CVL #1023
CVL #1188
DSA #1199
FCS_CKM.2
The FXOS supports only RSA in the evaluated configuration. RSA digital signature
is used in TLS and SSH connections.
The TOE uses a software-based random bit generator that complies with NIST 800-
90A CTR_DRBG (AES-256) Deterministic Random Bit Generation (DRBG)
operating in FIPS mode. In addition, the DRBG is seeded by an entropy source that
is at least 256-bit value derived from various highly sensitive and proprietary noise
sources described in the proprietary Entropy Design document.
Additionally, the TOE is designed to zeroize secret and private keys when they are
no longer required by the TOE. This zeroization mechanism is performed by
overwritten the sensitive keys and data with all 0’s before deleting them, follow by a
read-verify.
FCS_HTTPS_EXT.1
FCS_TLSC_EXT.2
FCS_TLSS_EXT.1
The TOE implements HTTP over TLS (or HTTPS) to support remote
administration using ASDM on ASA and web GUI on FXOS, and TLS to
support secure syslog connection. A remote administrator can connect over
HTTPS to the TOE with their web browser and load the ASDM software from
the ASDM.
ASA
The TOE supports TLS v1.2 and TLSv1.16
connections with any of the
following ciphersuites:
 TLS_RSA_WITH_AES_128_CBC_SHA
 TLS_RSA_WITH_AES_256_CBC_SHA
6
TLS version support is configurable by administrator on the ASA. Connection not supporting the configured TLS
version will not be established.
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 TLS_RSA_WITH_AES_128_CBC_SHA256
 TLS_RSA_WITH_AES_256_CBC_ SHA256
 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
When the TOE acts as a TLS client, the administrators can specify the reference-
identity using the following command:
asa(config)#crypto ca reference-identity reference-identity-name
follow by one or more of the values
cn-id value
dns-id value
srv-id value
uri-id value
For example,
ciscoasa(config)# crypto ca reference-identity syslogServer
ciscoasa(config-ca-ref-identity)# cn-id syslog.cisco.com
To configure the syslog server certification7
verification, use this syntax:
logging host interface_name syslog_ip [tcp/port | udp/port] [format emblem] [secure
[reference-identity reference_identity_name]] [permit-hostdown]
For example,
ciscoasa(config)# logging host outside 10.86.93.123 tcp/6514 secure reference-
identity syslogServer
NIST ”secp” curves are supported for all TLS connections by default but mutual
authentication must be configured with the client-side X.509v3 certificate.
The TOE can be configured to specify which TLS versions are supported using
asa(config)#ssl client-version {tlsv1 | tlsv1.1 | tlsv1.2}
asa(config)#ssl server-version {tlsv1 | tlsv1.1 | tlsv1.2}
The key agreement parameters of the server key exchange message are specified in
the RFC 5246 (section 7.4.3) for TLSv1.2 and RFC 4346 (section 7.4.3) for
TLSv1.1. The TOE conforms to both RFCs supporting both RSA 2048 bits and
NIST curves secp256r1, secp384r1, secp521r1.
7
Certificate pinning is not supported. In addition, IP address and wildcards are not supported in the ID.
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FXOS
When CC mode is enabled, the TOE (FXOS) will restrict the TLS versions to 1.1
and 1.2, and ciphersuites to only the ones allowed by the protection profile (for TLS
server and client):
 TLS_RSA_WITH_AES_128_CBC_SHA as defined in RFC 3268
 TLS_RSA_WITH_AES_256_CBC_SHA as defined in RFC 3268
 TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined in RFC 3268
 TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined in RFC 3268
 TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC 5246
 TLS_RSA_WITH_AES_256_CBC_ SHA256 as defined in RFC 5246
 TLS_DHE_RSA_WITH_AES_128_CBC_ SHA256 as defined in RFC 5246
 TLS_DHE_RSA_WITH_AES_256_CBC_ SHA256 as defined in RFC 5246
 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC 5289
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC 5289
FCS_IPSEC_EXT.1 The IPsec implementation provides VPN peer-to-peer, VPN site-to-site, and
VPN client to TOE (i.e., remote access) capabilities. The VPN site-to-site tunnel
allows for example the TOE acting as a VPN gateway and another TOE to
establish an IPsec tunnel to secure the passing of user data [ASA Only]. Another
configuration is the peer-to-peer configuration where the TOE can be set up
with an IPsec tunnel with a VPN peer to secure the session between the TOE
and the VPN peer [ASA and FXOS]. The VPN client to TOE configuration is
where a remote VPN client connects into the TOE in order to gain access to an
authorized private network [ASA Only]. Authenticating with the TOE would
give the VPN client a secure IPsec tunnel to connect over the internet into their
private network.
The TOE implements IPsec to provide both X509v3 certificate (ASA and
FXOS) and pre-shared key-based (ASA Only) authentications and encryption
services to prevent unauthorized viewing or modification of data as it travels
over the external network. The TOE implementation of the IPsec standard (in
accordance with the RFCs noted in the SFR) uses the Encapsulating Security
Payload (ESP) protocol to provide authentication, encryption and anti-replay
services. In addition, the TOE supports both transport and tunnel modes.
Transport mode is only supported for peer-to-peer IPsec connection while
tunnel mode is supported for all VPN connections including remote access.
IPsec Internet Key Exchange, also called IKE, is the negotiation protocol that
lets two peers agree on how to build an IPsec Security Association (SA). In the
evaluated configuration, only IKEv2 is supported. The IKEv2 protocols
implement Peer Authentication using the RSA (ASA and FXOS), ECDSA
(ASA Only) algorithm with X.509v3 certificates, or pre-shared keys (ASA
Only). IKEv2 separates negotiation into two phases: SA and Child SA. IKE SA
creates the first tunnel, which protects later IKE negotiation messages. The key
negotiated in IKE SA enables IKE peers to communicate securely in IKE Child
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SA. During Child SA IKE establishes the IPsec SA. IKE maintains a trusted
channel, referred to as a Security Association (SA), between IPsec peers that is
also used to manage IPsec connections, including:
 The negotiation of mutually acceptable IPsec options between peers
(including peer authentication parameters, either signature based or pre-
shared key based (ASA Only)),
 The establishment of additional Security Associations to protect packets
flows using Encapsulating Security Payload (ESP), and
 The agreement of secure bulk data encryption AES keys for use with
ESP. After the two peers agree upon a policy, the security parameters of
the policy are identified by an SA established at each peer, and these
IKE SAs apply to all subsequent IKE traffic during the negotiation
The TOE implements IPsec using the ESP protocol as defined by RFC 4303,
using the cryptographic algorithms AES-CBC-128, AES-CBC-256, AES-GCM-
128 and AES-GCM-256 (both specified by RFCs 3602 and 4106) along with
SHA-based HMAC algorithms, and using IKEv2, as specified for
FCS_IPSEC_EXT.1.5, to establish security associations. NAT traversal is
supported in IKEv2 by default.
The IKE SA exchanges use only main mode and the IKE SA lifetimes are able
to be limited to 24 hours for Phase 1 (SAs) and 8 hours for Phase 2 (Child SAs).
Furthermore, the IKE SA lifetime limits can be configured so that no more than
200 MB of traffic can be exchanged for IKE Child SAs. Administrators can
require use of main mode by configuring the mode for each IPsec tunnel, as in
the following examples:
asa(config)#crypto map map-name seq-num set ikev2 phase1-mode main
asa(config)# crypto ipsec security-association lifetime {seconds seconds |
kilobytes kilobytes}
asa(config-ikev2-policy)# lifetime seconds seconds
In the evaluated configuration, use of “confidentiality only” (i.e. using ESP
without authentication) for IPsec connections is prohibited. The TOE allows the
administrator to define the IPsec proposal for any IPsec connection to use
specific encryption methods and authentication methods as in the following
examples:
asa(config)#crypto ipsec ikev2 ipsec-proposal proposal tag proposal_name
asa(config-ipsec-proposal)#protocol esp encryption {aes | aes-192 | aes-256 |
aes-gcm | aes-gcm-192 | aes-gcm-256 | aes-gmac | aes-gmac-192 | aes-gmac-
256}
asa(config-ipsec-proposal)#protocol esp integrity {sha-1 | sha-256 | sha-384 |
sha-512 | null}
Note: When AES-GCM is used for encryption, the ESP integrity selection will
be “null” because GCM mode provides integrity. AES-GMAC is not allowed in
the evaluated configuration.
In the evaluated configuration, the IKEv2 protocols supported by the TOE
implement the following DH groups: 14 (2048-bit MODP), 19 (256-bit Random
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ECP), 20 (384-bit Random EC), and use the RSA and ECDSA algorithms for
Peer Authentication. The following command is used to specify the DH Group
used for SAs:
asa(config)#crypto ikev2 policy priority policy_index
asa(config-ikev2-policy)#encryption [null | des | 3des | aes | aes-1928
| aes-256 |
aes-gcm | aes-gcm-192 | aes-gcm-256]
asa(config-ikev2-policy)#integrity [md5 | sha | sha256 | sha384 | sha512]
asa(config-ikev2-policy)#group {14 | 19 | 20 | 24}
asa(config-ikev2-policy)#prf {sha | sha256 | sha384 | sha512}
The secret ‘x’ generated is 64 bytes long (or 512 bits), is the same across all the
DH groups, and is generated with the DRBG specified in FCS_RBG_EXT.1.
This is almost double the size of the highest comparable strength value which is
384 bits.
The TOE has a configuration option to deny tunnel if the phase 2 SA is weaker
than the phase 1. The crypto strength check is enabled via the crypto ipsec
ikev2 sa-strength-enforcement command.
The TOE can be configured to authenticate IPsec connections using RSA and
ECDSA signatures. When using RSA and ECDSA signatures for authentication, the
TOE and its peer must be configured to obtain certificates from the same
certification authority (CA).
To configure an IKEv2 connection to use a RSA or ECDSA signature:
asa(config)#tunnel-group name ipsec-attributes
asa(config-tunnel-ipsec)#ikev2 {local-authentication | remote-authentication}
certificate trustpoint
Pre-shared keys can be configured in TOE (ASA only) for IPsec connection
authentication. However, pre-shared keys are only supported when using
IKEv2 for peer-to-peer VPNs. The text-based pre-shared keys can be composed
of any combination of upper and lower case letters, numbers, and special
characters (that include: “!”, “@”, “#”, “$”, “%”, “^”, “&”, “*”, “(“, “)”, “?”,
space “ “, tilde~, hyphen-, underscore_, plus+, equal=, curly-brackets{}, square-
brackets[], vertical-bar(pipe)|, forward-slash/, back-slash\, colon:, semi-colon;,
double-quote“, single-quote‘, angle-brackets<>, comma,, and period.. The text-
based pre-shared keys can be 1-128 characters in length and is conditioned by
a“prf” (pseudo-random function) configurable by the administrator. The bit-
based pre-shared keys can be entered as HEX value as well. When using pre-
shared keys for authentication, the IPsec endpoints must both be configured to
use the same key.
To configure an IKEv2 connection to use a pre-shared key:
8
ASA supports AES-192 CBC and GCM but AES-192* was not an option in the VPN Gateway Extended Package.
Therefore, the use of AES-128* or AES-256* is recommended over AES-192*.
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asa(config)#tunnel-group name ipsec-attributes
asa(config-tunnel-ipsec)#ikev2 {local-authentication | remote-authentication} pre-
shared-key hex key-value
To configure the reference identifier, please use the following command:
asa(config)#crypto ca reference-identity reference-identity-name
follow by one or more of the values
cn-id value
dns-id value
srv-id value
uri-id value
Specifying the reference-identity keyword enables RFC 6125 (section 6.0) checks
and identifies the reference identity to use by name.
A crypto map (the Security Policy Definition) set can contain multiple entries, each
with a different access list. The crypto map entries are searched in a top-down
sequence - the TOE attempts to match the packet to the crypto access control list
(ACL) specified in that entry. The crypto ACL can specify a single address or a
range of address and the crypto map can be applied to an inbound interface or an
outbound interface. When a packet matches a permit entry in a particular access list,
the method of security in the corresponding crypto map of that interface is applied. If
the crypto map entry is tagged as ipsecisakmp, IPsec is triggered. The traffic
matching the permit crypto ACLs would then flow through the IPSec tunnel and be
classified as PROTECTED. Traffic that does not match a permit crypto ACL or
match a deny crypto ACL in the crypto map, but is permitted by other ACLs on the
interface is allowed to BYPASS the tunnel. Traffic that does not match a permit
crypto ACL or match a deny crypto ACL in the crypto map, and is also blocked by
other non-crypto ACLs on the interface would be DISCARDED.
FXOS
When CC mode is enabled, FXOS supports the following:
 IKE version: version 2
 IPsec Mode: tunnel, transport
o set mode {tunnel |transport}
 IKEv2 Mode: main mode
 IKEv2 Ciphers:
o Encryption algorithms: AES-CBC-128, AES-CBC-256, AES-
GCM-128
o Integrity algorithms: SHA-1
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o DH Groups: 14, 24
 ESP Ciphers:
o Encryption algorithms: AES-CBC-128, AES-CBC-256
o Integrity algorithms: SHA-1
 Authentication: X.509v3 certificates
o create authority trustpoint_name
 Traffic Selector: remote host or subnet
o set local-addr ip_address
o set remote-addr ip_address
o set remote-subnet ip/mask
o set remote-ike-ident remote_identity_name
 IKE SA Life Time: Configurable up to 24 hours
o set ike-rekey-time minutes
 IKE Child SA Life Time: Configurable up to 8 hours
o set esp-rekey-time minutes
 Reference Identifier
o set remote-ike-ident remote_identity_name
In FXOS, the SPDs are pretty simple because FXOS is not operating as a
VPN gateway, and the SPDs are just based on IP addresses, so the type of
traffic being tunneled (syslog, LDAP, etc.) is irrelevant to the tunneling
decisions.
 The local-addr is the local management IP.
 The remote-addr is the IP of the IPsec peer (in tunnel mode or
transport mode).
 A remote-subnet is applicable only in tunnel mode, and defines the
subnet that would be reachable beyond the remote-addr.
 Outbound traffic will be encrypted when the source address is local-
addr, *and*:
o the destination address is the remote-addr (in tunnel or
transport mode); *or*
o the destination address is on the remote-subnet (in tunnel
mode).
 Outbound traffic will bypass the tunnel if:
o the destination address is *not* the remote-addr; *and*
o the destination address is *not* on the remote-subnet.
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 Inbound traffic will be dropped if:
o the source address (prior to decryption) is on the remote-
subnet (in tunnel mode); *or*
o the source address is the remote-address, *and* the packets
are *not* IKE or ESP.
FCS_SSHS_EXT.1 FXOS Only
FXOS implement SSHv2 servers as specified in RFCs 4252 and 4253 (telnet is
disabled in the evaluated configuration). SSHv2 sessions are limited to a
configurable session timeout period of 120 seconds, a configurable max number of
failed authentication attempts (default is 3), and will be rekeyed after no more than
2^28 packets. SSH connections will be dropped if the TOE receives a packet larger
than 65,535 bytes.
The FXOS’s implementation of SSHv2 supports:
 Public key algorithm RSA for signing and verification as part of the SSH
authentication;
 Password-based authentication for administrative users;
 Encryption algorithms, AES-CBC-128, AES-CBC-256 to ensure
confidentiality of the session;
 Hashing algorithm hmac-sha19
to ensure the integrity of the session for
FXOS. FXOS additionally supports hmac-sha2-256 and hmac-sha2-512.
 Requiring use of DH group 14 by using the following command when
enabling SSHv2 on an interface:
FXOS allows authorized administrator to specify the maximum amount of data that
may be transmitted before the SSH session key is renegotiated, optionally followed a
maximum amount of time that may pass before the session key is renegotiated.
MIO-A /system/services # set ssh-server rekey-limit volume [ KB ] time [Minutes]
FDP_RIP.2 ASA Only
The TOE ensures that packets transmitted through the TOE do not contain residual
information from previous packets. Packets that are not the required length use zeros
for padding. Residual data is never transmitted from the TOE. Packet handling
within memory buffers ensures new packets cannot contain portions of previous
packets. This applies to data plane traffic and even administrative session traffic.
9
When FIPS mode (‘fips enable’) is enabled, it will restrict what is allowed for SSH, including limiting HMAC to
only hmac-sha1. Note this is for ASA only.
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FIA_PMG_EXT.1 The TOE supports the local definition of users with corresponding passwords. The
passwords can be composed of any combination of upper and lower case letters,
numbers, and special characters as listed in the SFR. Minimum password length is
settable by the Authorized Administrator, and support passwords of 8 to 127
characters (ASA) and 8 to 80 characters (FXOS) when “enforce-strong-password”
option is enabled in security scope. Password composition rules specifying the types
and number of required characters that comprise the password are settable by the
Authorized Administrator. Passwords can be configured with a maximum lifetime,
configurable by the Authorized Administrator. New passwords can be required to
contain a minimum of 4 character changes from the previous password.
FIA_UIA_EXT.1 The TOE requires all users to be successfully identified and authenticated before
allowing any TSF mediated actions to be performed. Administrative access to the
TOE is facilitated through the TOE’s CLI (SSH for FXOS, SSH over IPsec for ASA,
or local console), and through the GUI (ASDM) or web GUI (FXOS). The TOE
mediates all administrative actions through the CLI and GUI. Once a potential
administrative user attempts to access an administrative interface either locally or
remotely, the TOE prompts the user for a user name and password. Only after the
administrative user presents the correct authentication credentials will access to the
TOE administrative functionality be granted. No access is allowed to the
administrative functionality of the TOE until an administrator is successfully
identified and authenticated.
The TOE provides an automatic lockout when a user attempts to authenticate and
enters invalid credentials. After a defined number of authentication attempts fail
exceeding the configured allowable attempts, the user is locked out until an
authorized administrator can unlock the user account.
FIA_UAU_EXT.2 The TOE provides a local password based authentication mechanism as well as
RADIUS (ASA and FXOS), LDAP (FXOS only), and TACACS (FXOS only)
authentication.
The administrator authentication policies include authentication to the local user
database or redirection to a remote authentication server. Interfaces can be
configured to try one or more remote authentication servers, and then fall back to the
local user database if the remote authentication servers are inaccessible.
The TOE can invoke an external authentication server to provide a single-use
authentication mechanism by forwarding the authentication requests to the external
authentication server (when configured by the TOE to provide single-use
authentication).
The process for authentication is the same for administrative access whether
administration is occurring via a directly connected console cable or remotely via
SSHv2, SSH over IPsec (ASA only) or TLS. At initial login in the administrative
user is prompted to provide a username. After the user provides the username, the
user is prompted to provide the administrative password associated with the user
account. The TOE then either grants administrative access (if the combination of
username and password is correct) or indicates that the login was unsuccessful. The
TOE does not provide indication of whether the username or password was the
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reason for an authentication failure.
FIA_UAU.7 When a user enters their password at the local console, the TOE displays only ‘*’
characters so that the user password is obscured. For remote session authentication,
the TOE does not echo any characters as they are entered.
FIA_X509_EXT.1
FIA_X509_EXT.2
FIA_X509_EXT.3
The TOE support X.509v3 certificates as defined by RFC 5280. Public key
infrastructure (PKI) credentials, such as private keys and certificates are stored in a
specific location, such as NVRAM and flash memory. The identification and
authentication, and authorization security functions protect an unauthorized user
from gaining access to the storage.
The validity check for the certificates takes place at session establishment and/or at
time of import depending on the certificate type. For example, server certificate is
checked at session establishment while CA certificate is checked at both. The TOE
conforms to standard RFC 5280 for certificate and path validation (i.e., peer
certificate checked for expiration, peer certificate checked if signed by a trusted CA
in the trust chain, peer certificate checked for unauthorized modification, peer
certificate checked for revocation).
The TOE can generate a RSA or ECDSA (ASA only) key pair that can be embedded
in a Certificate Signing Request (CSR) created by the TOE. The key pair on ASA
can be generated with the following command:
asa(config)#crypto key generate [rsa [general-keys | label <name> | modules [512 |
768 | 1024 | 2048 | 4096] | noconfirm | usage-keys] | ecdsa [label <name> | elliptic-
curve [256 | 384 | 521] | noconfirm]]
The TOE can then send the CSR manually to a Certificate Authority (CA) for the
CA to sign and issue a certificate. Once the certificate has been issued, the
administrator can import the X.509v3 certificate into the TOE. Integrity of the CSR
and certificate during transit are assured through the use of digital signature (signing
the hash of the TOE’s public key contained in the CSR and certificate). OCSP (ASA
only) and CRL are configurable and may be used for certificate revocation check.
Checking is also done for the basicConstraints extension and the cA flag to
determine whether they are present and set to TRUE. If they are not, the CA
certificate is not accepted as a trustpoint.
The administrators can configure a trustpoint and associate it with a crypto map.
This will tell the TOE which certificate(s) to use during the validation process.
When the TOE cannot establish a connection for the validity check (e.g., CRL
checking) or if the peer certificate is invalid (see above), the trusted channel is not
established. The TOE can configure the expected domain name/hostname (i.e.,
reference identifier) and compare the TLS server’s certificate Common Name (CN)
and/or Subject Alternative Name (SAN) to the reference identifier based on section
6 of RFC 6125. If there is no match, the trust channel is not established. For more
information, please refer to the Preparative Procedures & Operational User Guide
for the Common Criteria Certified Configuration.
FMT_MOF.1(1)/ The TOE restricts the ability to enable, disable, determine and modify the behavior
of all of the security functions of the TOE to an authorized administrator. The TOE
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TrustedUpdate
FMT_MOF.1(1)/
AdminAct
FMT_MOF.1(2)/
AdminAct
provides the ability for authorized administrators to initiate TOE update, enable or
disable service and features, and access TOE data, such as audit data, configuration
data, security attributes, information flow rules, and session thresholds.
FMT_MTD.1 ASA
The ASA provides the ability for authorized administrators to access TOE data, such
as audit data, configuration data, security attributes, routing tables, and session
thresholds. The TOE also restricts access to TSF data so that no manipulation can
be performed by non-administrators. Each of the predefined and administratively
configured privilege level has default set of permissions that will grant them access
to the TOE data, though with some privilege levels, the access is limited. The ASA
performs role-based authorization, using the platform authorization mechanisms, to
grant access to the semi-privileged and privileged levels. For the purposes of this
evaluation, the privileged level is equivalent to full administrative access to the CLI
or GUI, and equivalent to privilege level 15. The term “authorized administrator” or
“Security Administrator” is used in this ST to refer to any user which has been
assigned to a privilege level that is permitted to perform the relevant action.
FXOS
User accounts are used to access the FXOS system. Up to 48 local user accounts can
be configured. Each user account must have a unique username and password. The
‘admin’ account is a default user account and cannot be modified or deleted. This
account is the system administrator or superuser account and has full privileges. The
term “authorized administrator” or “Security Administrator” applies to this account
and other accounts assigned to the Administrator role.
FMT_SMF.1 ASA
The ASA is configured to restrict the ability to enter privileged configuration mode
to level 15 users (the authorized administrator) once AAA authorizations has been
enabled. Privileged configuration (EXEC) mode is where the commands are
available to modify user attributes (‘username’ and ‘password’ commands),
operation of the TOE (‘reload’), authentication functions (‘aaa’ commands'), audit
trail management (‘logging’ commands), backup and restore of TSF data (‘copy’
commands), communication with authorized external IT entities (‘ssh’ and ‘access
list’ commands), information flow rules (‘access list’ commands), modify the
timestamp (‘clock’ commands), specify limits for authentication failures (‘aaa local
authentication lockout’), etc. These commands are not available outside of this
mode. Communications with external IT entities, include the host machine for
ASDM. This is configured through the use of ‘https’ commands that enable
communication with the host and limit the IP addresses from which communication
is accepted.
Note that the ASA does not provide services (other than connecting using SSH,
HTTPS, and establishment of VPNs) prior to authentication so there are no
applicable commends. There are specific commands for the configuration of
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cryptographic services. Trusted updates to the product can be verified using
cryptographic digital signature.
The ASDM uses the same privileges that the user would have at the CLI to
determine access to administrative functions in the ASDM GUI. All administrative
configurations are done through the ‘Configuration’ page.
FXOS
The system uses role-based privileges to control and restrict access to the TSF data
and functions. No access or service is provided prior to identification and
authentication, beyond viewing the login banner.
FMT_SMR.2 ASA
The ASA supports multiple levels of administrators, the highest of which is a
privilege 15. In this evaluation, privilege 15 would be the equivalent of the
authorized administrator with full read-write access. Multiple level 15
administrators with individual usernames can be created.
Through the CLI the ‘username’ command is used to maintain, create, and delete
users. Through ASDM this is done on the ‘Configuration > Device Management >
Users/AAA > User Accounts’ page.
Usernames defined within the local user database are distinguished based on their
privilege level (0-15) and the service-type attribute assigned to the username, which
by default it “admin”, allowing the username to authenticate (with valid password)
to admin interfaces.
'aaa authentication ssh console LOCAL' can be used to set the TOE to authenticate
SSH users against the local database.
'aaa authorization exec' can be used to require re-authentication of users before they
can get to EXEC mode.
The ASA also supports creating of VPN User accounts, which cannot login locally
to the ASA, but can only authenticate VPN sessions initiated from VPN Clients.
VPN users are accounts with privilege level 0, and/or with their service-type
attribute set to “remote-access”.
When command authorization has been enabled the default sets of privileges take
effect at certain levels, and the levels become customizable.
 When “aaa authorization command LOCAL” has NOT been applied to the
config:
o All usernames with level 2 and higher have the same full read-write
access as if they had level 15 once their interactive session (CLI or
ASDM) is effectively at level 2 or higher.
o Usernames with privilege levels 1 and higher can login to the CLI,
and “enable” to their max privilege level (the level assigned to their
username).
o Usernames with privilege levels 2-14 can login to ASDM, and have
full read-write access.
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o Privilege levels cannot be customized.
 When “aaa authorization command LOCAL” has been applied to the config:
o Default command authorizations for privilege levels 3 and 5 take
effect, where level 3 provides “Monitor Only” privileges, levels 4
and higher inherit privileges from level 3, level 5 provides “Read
Only” privileges (a superset of Monitor Only privileges), and levels
6-14 inherit privileges from level 5.
o Privilege levels (including levels 3 and 5) can be customized from
the default to add/remove specific privileges.
To display the set of privileges assigned to levels 3 or 5 (or any other privilege
level), use “show running-config all privilege all”, which shows all the default
configuration settings that are not shown in the output of “show running-config all”.
FXOS
The system contains the following user roles:
Administrator
Complete read-and-write access to the entire system. The default admin account is
assigned this role by default and it cannot be changed.
Read-Only
Read-only access to system configuration with no privileges to modify the system
state.
Operations
Read-and-write access to NTP configuration, Smart Licensing, and system logs,
including syslog servers and faults. Read access to the rest of the system.
AAA Administrator
Read-and-write access to users, roles, and AAA configuration. Read access to the
rest of the system.
FPT_SKP_EXT.1 ASA
The TOE stores all private keys in a secure directory (an ‘opaque’ virtual filesystem
in RAM called “system:”) that is not readily accessible to administrators. All pre-
shared and symmetric keys are stored in encrypted form, or are masked when
showing the configuration via administrative interfaces (CLI or GUI).
FXOS
All keys are stored on flash memory without encryption. Only admin users can load
a debugging plugin (which is NOT given to customers) to have a file system based
access to key files.
FPT_APW_EXT.1 ASA
The TOE includes a Master Passphrase features that can be used to configure the
TOE to encrypt all locally defined user passwords. In this manner, the TOE ensures
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that plaintext user passwords will not be disclosed even to administrators.
FXOS
All passwords are stored in hashed form using SHA-512.
FPT_STM.1 The ASA and FXOS provides a source of date and time information for the TOE,
used in audit timestamps, in validating service requests, and for tracking time-based
actions related to session management including timeouts for inactive administrative
sessions (FTA_SSL_EXT.*), and renegotiating SAs for IPsec tunnels
(FCS_IPSEC_EXT.1). This function can only be accessed from within the
configuration exec mode via the privileged mode of operation or using the
appropriate role. The clock function is reliant on the system clock provided by the
underlying hardware.
The clock’s date and time can be adjusted by authorized administrators, and
authorized administrators can configure the TOE to use clock updates from NTP
servers. The TOE supports use of NTP version 3, which supports use of hashing to
authenticate clock updates, but use of any hashing method in NTPv3 is outside the
scope of this Common Criteria evaluation.
FPT_TST_EXT.1
FPT_TST_EXT.2
The ASA and FXOS run a suite of self-tests during initial start-up (power-on-self-
tests or POST) to verify its correct operation. When FIPS mode is enabled on the
ASA and CC mode is enabled on the FXOS, additional cryptographic tests and
software integrity test will be run during start-up. The self-testing includes
cryptographic algorithm tests (known-answer tests) that feed pre-defined data to
cryptographic modules and confirm the resulting output from the modules match
expected values, and firmware integrity tests that verify the digital signature of the
code image using RSA-2048 with SHA-512. The cryptographic algorithm testing
verifies proper operation of encryption functions, decryption functions, signature
padding functions, signature hashing functions, and random number generation. The
firmware integrity testing verifies the ASA and FXOS images have not been
tampered with or corrupted. If any of these self-tests fails, the TOE will cease
operation. For more details, please see FPT_FLS.1.
FPT_TUD_EXT.1 The TOE (and other TOE components) have specific versions that can be queried by
an administrator. When updates are made available by Cisco, an administrator can
obtain and manually install those updates.
Digital signatures are used to verify software/firmware update files (to ensure they
have not been modified from the originals distributed by Cisco) before they are used
to update the applicable TOE components. The update process will fail if the digital
signature verification process fails. Instructions on how to perform verification and
update are provided in the Preparative Procedures & Operational User Guide for the
Common Criteria Certified Configuration.
FTA_SSL_EXT.1 An administrator can configure maximum inactivity times for both local and remote
administrative sessions. When a session is inactive (i.e., no session input) for the
configured period of time the TOE will terminate the session, requiring the
administrator to log in again to establish a new session when needed.
FTA_SSL.3
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FTA_SSL.4 An administrator is able to exit out of both local and remote administrative sessions,
effectively terminating the session so it cannot be re-used and will require
authentication to establish a new session.
FTA_TAB.1 The TOE provides administrators with the capability to configure advisory banner or
warning message(s) that will be displayed prior to completion of the logon process at
the local console or via any remote connection (e.g., SSH, SSH over IPsec, or
HTTPS).
FTP_ITC.1 The TOE uses IPsec and/or TLS to protect communications between itself and
remote entities for the following purposes:
 The TOE protects transmission of audit records when sending syslog
message to a remote audit server by transmitting the message over IPsec
(ASA and FXOS) or TLS (ASA Only).
 Connections to authentication servers (AAA servers) can be protected via
IPsec or TLS tunnels. Connections with AAA servers can be configured for
authentication of TOE administrators.
o RADIUS over IPsec (ASA and FXOS)
o LDAP over IPsec (FXOS Only)
o TACACS+ over IPsec (FXOS Only)
 Connections to VPN peers can be initiated from the TOE (ASA Only) using
IPsec. In addition, the TOE (ASA Only) can establish secure VPN tunnels
with IPsec VPN clients. Note that the remote VPN client is in the
operational environment.
FTP_TRP.1 The TOE uses SSHv2 on FXOS, SSH over IPsec on ASA, or HTTPS (ASDM on
ASA or web GUI10
on FXOS) to provide the trusted path (with protection from
disclosure and modification) for all remote administration sessions. Optionally, the
ASA also supports tunneling the SSH and ASDM connections in IPsec VPN tunnels
(peer-to-peer, or remote VPN client).
FFW_RUL_EXT.1.1
FFW_RUL_EXT.1.2
ASA Only
The ASA provides stateful traffic filtering of IPv4 and IPv6 network traffic.
Administratively-defined traffic filter rules (access-lists) can be applied to any
interface to filter traffic based on IP parameters including source and destination
address, transport layer protocol, type and code, TCP and UDP port numbers. The
ASA allows establishment of communications between remote endpoints, and tracks
the state of each session (e.g. initiating, established, and tear-down), and will clear
established sessions after proper tear-down is completed as defined by each protocol,
or when session timeouts are reached.
10
Also known as the firepower chassis manager.
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To track the statefulness of sessions to/from and through the firewall, the ASA
maintains a table of connections in various connection states and connection flags.
The ASA updates the table (adding, and removing connections, and modifying states
as appropriate) based on configurable connection timeout limits, and by inspecting
fields within the packet headers. For further explanation of connection states, see
section 7.1.
The proper session establishment and termination followed by the ASA is as defined
in the following RFCs:
 RFC 792 (ICMPv4)
 RFC 4443 (ICMPv6)
 RFC 791 (IPv4)
 RFC 2460 (IPv6)
 TCP, RFC 793, section 2.7 Connection Establishment and Clearing
 UDP, RFC 768 (not applicable, UDP is a “stateless” protocol)
During initialization/startup (while the ASA is booting) the configuration has yet to
be loaded, and no traffic can flow through any of its interfaces. No traffic can flow
through the ASA interfaces until the POST has completed, and the configuration has
been loaded. If any aspect of the POST fails during boot, the ASA will reload
without forwarding traffic. If a critical component of the ASA, such as the clock or
cryptographic modules, fails while the ASA is in an operational state, the ASA will
reload, which stops the flow of traffic. If a component such as a network interface,
which is not critical to the operation of the ASA, but may be critical to one or more
traffic flows, fails while the ASA is operational, the ASA will continue to function,
though all traffic flows through the failed network interface(s) will be dropped.
FFW_RUL_EXT.1.2 ASA Only
The ASA supports filtering of the following protocols and enforces proper session
establishment, management, and termination as defined in each protocol’s RFC
including proper use of:
 Addresses, type of service, fragmentation data, size and padding, and IP options
including loose source routing, strict source routing, and record route as defined
in RFC 791 (IPv4), and RFC 2460 (IPv6);
 Port numbers, sequence and acknowledgement numbers, size and padding, and
control bits such as SYN, ACK, FIN, and RST as defined in RFC 793 (TCP);
 Port numbers, and length as defined in RFC 768 (UDP); and
 Session identifiers, sequence numbers, types, and codes as defined in RFC 792
(ICMPv4), and RFC 4443 (ICMPv6).
Cisco confirms proper implementation of the RFCs through interoperability testing
with Cisco and 3rd
party products and through protocol compliant testing.
The ASA can also support deeper packet inspection and enforce additional RFC
compliance beyond session management, but such traffic inspection functionality is
not defined within the FWcPP and is therefore beyond the scope of this CC
certification.
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FFW_RUL_EXT.1.3,
FFW_RUL_EXT.1.4
ASA Only
Each traffic flow control rule on the ASA is defined as either a “permit” rule, or a
“deny” rule, and any rule can also contain the keyword “log” which will cause a log
message to be generated when a new session is established because it matched the
rule. The ASA can be configured to generate a log message for the session
establishment of any permitted or denied traffic. When a rule is created to explicitly
allow a protocol which is implicitly allowed to spawn additional sessions, the
establishment of spawned sessions is logged as well.
Access Control Lists (ACLs) are only enforced after they’ve been applied to a
network interface. Any network interface can have an ACL applied to it with the
“access-group” command, e.g. “access-group sample-acl in interface outside”.
Interfaces can be referred to by their identifier (e.g. GigabitEthernet 0/1), or by a
name if named using the “nameif” command e.g.:
asa(config)# interface gigabitethernet0/1
asa(config-if)# nameif inside
The interface types that can be assigned to an access-group are:
 Physical interfaces
o Ethernet
o GigabitEthernet
o TenGigabitEthernet
o Management
 Port-channel interfaces (designated by a port-channel number)
 Subinterface (designated by the subinterface number)
The default state of an interface depends on the type and the context mode:
 For the “system” context in single mode or multiple context mode,
interfaces have the following default states:
o Physical interfaces = Disabled
o Subinterfaces = Enabled. However, for traffic to pass through the
subinterface, the physical interface must also be enabled.
 For any non-system context (in multiple context mode): All allocated
interfaces (allocated to the context by the system context) are enabled by
default, no matter what the state of the interface is in the system context.
However, for traffic to pass through the interface, the interface also has to be
enabled in the system context. If you shut down an interface in the system
context, then that interface is down in all contexts to which that interface has
been allocated.
In interface configuration mode, the administrator can configure hardware settings
(for physical interfaces), assign a name, assign a VLAN, assign an IP address, and
configure many other settings, depending on the type of interface and the security
context mode.
For an enabled interface to pass traffic, the following interface configuration mode
commands must be used (in addition to explicitly permitting traffic flow by applying
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and access-group to the interface): “nameif”, and, for routed mode, “ip address”.
For subinterfaces, also configure the “vlan” command.
FFW_RUL_EXT.1.5 ASA Only
All traffic that goes through the ASA is inspected using the Adaptive Security
Algorithm and either is allowed through or dropped. A simple packet filter can
check for the correct source address, destination address, and ports, but it does not
check that the packet sequence or flags are correct. A filter also checks every packet
against the filter, which can be a slow process.
A stateful firewall like the ASA, however, takes into consideration the state of a
packet:
 Is this a new connection?
If it is a new connection, the ASA has to check the packet against access control lists
and perform other tasks to determine if the packet is allowed or denied. To perform
this check, the first packet of the session goes through the "session management
path," and depending on the type of traffic, it might also pass through the "control
plane path."
The session management path is responsible for the following tasks:
– Performing the access list checks
– Performing route lookups
– Allocating NAT translations (xlates)
– Establishing sessions in the "fast path"
The ASA creates forward and reverse flows in the fast path for TCP traffic; the TOE
also creates connection state information for connectionless protocols like UDP,
ICMP (when you enable ICMP inspection), so that they can also use the fast path.
 Is this an established connection?
If the connection is already established, the ASA does not need to re-check packets
against the ACL; matching packets can go through the "fast" path based on attributes
identified in FFW_RUL_EXT.1.5. The fast path is responsible for the following
tasks:
– IP checksum verification
– Session lookup
– TCP sequence number check
– NAT translations based on existing sessions
– Layer 3 and Layer 4 header adjustments
FFW_RUL_EXT.1.6,
FFW_RUL_EXT.1.7
ASA Only
ASA can be configured to implement default denial of various mal-formed
packets/fragments, and other illegitimate network traffic, and can be configured to
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log that such packets/frames were dropped.
ASA can be used to deny and log traffic by defining policies with the “ip audit
name” command, specifying the “drop” action, and applying the policy or policies to
each enabled interface. Each signature has been classified as either “informational”,
or “attack”. Using the “info” and “attack” keywords in the “ip audit name”
command defines the action the ASA will take for each signature classification.
asa(config)# ip audit name name {info | attack} [action [alarm] [drop] [reset]]
asa(config)# ip audit interface interface_name policy_name
Example:
asa(config)# ip audit name ccpolicy1 attack action alarm reset
asa(config)# ip audit name ccpolicy2 info action alarm reset
asa(config)# ip audit interface outside ccpolicy1
asa(config)# ip audit interface inside ccpolicy2
Specifying the “alarm” action in addition to the “drop” action will result in
generating an audit message when the signature is detected. Messages 400000 through
400051 are Cisco Intrusion Prevention Service signature messages, and have this format:
%ASA-4-4000nn: IPS:number string from IP_address to IP_address on interface
interface_name
The following traffic will be denied by the ASA, and audit messages will be
generated as indicated:
1. packets which are invalid fragments, including IP fragment attack
%ASA-2-106020: Deny IP teardrop fragment (size = number, offset = number) from IP_address
to IP_address
%ASA-4-209004: Invalid IP fragment, size = bytes exceeds maximum size= bytes: src =
source_address, dest = dest_address, proto = protocol, id = number
%ASA-4-402118: IPSEC: Received an protocol packet (SPI=spi, sequence number
seq_num) from remote_IP (username) to local_IP containing an illegal IP fragment of length
frag_len with offset frag_offset.
The following messages will be generated when configured as described above.
%ASA-4-400007: IPS:1100 IP Fragment Attack from IP_address to IP_address on interface
interface_name
%ASA-4-400009: IPS:1103 IP Overlapping Fragments (Teardrop) from IP_address to
IP_address on interface interface_name
%ASA-4-400023: IPS:2150 Fragmented ICMP traffic from IP_address to IP_address on
interface interface_name
%ASA-4-400025: IPS:2154 Ping of Death Attack from IP_address to IP_address on
interface interface_name
2. fragmented IP packets which cannot be re-assembled completely;
%ASA-4-209003: Fragment database limit of number exceeded: src = source_address, dest =
dest_address, proto = protocol, id = number
%ASA-4-209005: Discard IP fragment set with more than number elements: src = Too many elements
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are in a fragment set.
%ASA-4-423005: Dropped NBDGM pkt_type_name fragment with error_reason_str
from ifc_name:ip_address/port to ifc_name:ip_address/port.
%ASA-4-507002: Data copy in proxy-mode exceeded the buffer limit
%ASA-7-715060: Dropped received IKE fragment. Reason: reason
%ASA-7-715062: Error assembling fragments! Fragment numbers are non-
continuous.
3. packets where the source address of the network packet is equal to the address of
the network interface where the network packet was received;
%ASA-2-106016: Deny IP spoof from (IP_address) to IP_address on interface
interface_name.
4. packets where the source address of the network packet does not belong to the
networks associated with the network interface where the network packet was
received;
%ASA-2-106016: Deny IP spoof from (IP_address) to IP_address on interface
interface_name.
This next message appears when Unicast RPF has been enabled with the ip verify
reverse-path command.
%ASA-1-106021: Deny protocol reverse path check from source_address to
dest_address on interface interface_name
This next message appears when a packet matching a connection arrived on a
different interface from the interface on which the connection began, and the ip
verify reverse-path command is not configured.
%ASA-1-106022: Deny protocol connection spoof from source_address to
dest_address on interface interface_name
5. packets where the source address of the network packet is defined as being on a
broadcast network;
%ASA-2-106016: Deny IP spoof from (IP_address) to IP_address on interface
interface_name.
6. packets where the source address of the network packet is defined as being on a
multicast network;
%ASA-4-106023: Deny protocol src
[interface_name:source_address/source_port] dst
interface_name:dest_address/dest_port [type {string}, code {code}] by
access_group acl_ID
The following message will be generated when the rules listed below are
configured without the “log” option.
%ASA-4-106100: access-list acl_ID denied protocol
interface_name/source_address(source_port) -
interface_name/dest_address(dest_port) hit-cnt number ({first hit | number-
secondinterval}) hash codes
The following message will be generated when these rules are configured
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with the “log” option:
asa(config)#object-group network grp_name
asa(config-network-object-group)#network-object 224.0.0.0 255.0.0.0 #IPv4
multicast
asa(config-network-object-group)#network-object FF00::/8 #IPv6
multicast
asa(config)#access-list acl-name extended deny ip grp-name any [log]
asa(config)#access-group in interface int-name
7. packets where the source address of the network packet is defined as being a
loopback address;
%ASA-2-106016: Deny IP spoof from (IP_address) to IP_address on interface
interface_name.
The following message will be generated when no ACL has been defined to
explicitly deny this traffic.
%ASA-4-106023: Deny protocol src
[interface_name:source_address/source_port] dst
interface_name:dest_address/dest_port [type {string}, code {code}] by
access_group acl_ID
The following message will be generated when the rules listed below are
configured without the “log” option.
%ASA-4-106100: access-list acl_ID denied protocol
interface_name/source_address(source_port) -
interface_name/dest_address(dest_port) hit-cnt number ({first hit | number-
secondinterval}) hash codes
The following message will be generated when these rules are configured
with the “log” option:
asa(config)#object-group network grp_name
asa(config-network-object-group)#network-object 127.0.0.0 255.0.0.0 #IPv4
loopback
asa(config-network-object-group)#network-object ::1/128 #IPv6 loopback
asa(config)#access-list acl-name extended deny ip grp-name any [log]
asa(config)#access-group in interface int-name
8. packets where the source address of the network packet is a multicast;
See item number 6.
9. packets where the source or destination address of the network packet is a link-
local address;
%ASA-2-106016: Deny IP spoof from (IP_address) to IP_address on interface
interface_name.
The following message will be generated when no ACL has been defined to
explicitly deny this traffic.
%ASA-4-106023: Deny protocol src
[interface_name:source_address/source_port] dst
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interface_name:dest_address/dest_port [type {string}, code {code}] by
access_group acl_ID
The following message will be generated when the rules listed below are
configured without the “log” option.
%ASA-4-106100: access-list acl_ID denied protocol
interface_name/source_address(source_port) -
interface_name/dest_address(dest_port) hit-cnt number ({first hit | number-
secondinterval}) hash codes
The following message will be generated when these rules are configured
with the “log” option:
asa(config)#object-group network grp_name
asa(config-network-object-group)#network-object 127.0.0.0 255.0.0.0 #IPv4 link-
local
asa(config-network-object-group)#network-object FE80::/10 #IPv6 link-local
asa(config)#access-list acl-name extended deny ip grp-name any [log]
asa(config)#access-list acl-name extended deny ip any grp-name [log]
asa(config)#access-group in interface int-name
10. packets where the source or destination address of the network packet is defined
as being an address “reserved for future use” as specified in RFC 5735 for IPv4;
%ASA-4-106023: Deny protocol src
[interface_name:source_address/source_port] dst
interface_name:dest_address/dest_port [type {string}, code {code}] by
access_group acl_ID
The following message will be generated when the rules listed below are
configured without the “log” option.
%ASA-4-106100: access-list acl_ID denied protocol
interface_name/source_address(source_port) - interface_name/dest_address(dest_port) hit-
cnt number ({first hit | number-secondinterval}) hash codes
The following message will be generated when these rules are configured
with the “log” option:
asa(config)#object-group network grp_name
asa(config-network-object-group)#network-object 192.0.0.0 255.0.0.0 #IPv4
reserved
asa(config-network-object-group)#network-object 240.0.0.0 128.0.0.0 #IPv4
reserved
asa(config)#access-list acl-name extended deny ip grp-name any [log]
asa(config)#access-list acl-name extended deny ip any grp-name [log]
asa(config)#access-group in interface int-name
11. packets where the source or destination address of the network packet is defined
as an “unspecified address” or an address “reserved for future definition and
use” as specified in RFC 3513 for IPv6;
%ASA-4-106023: Deny protocol src
[interface_name:source_address/source_port] dst
interface_name:dest_address/dest_port [type {string}, code {code}] by
access_group acl_ID
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The following message will be generated when the rules listed below are
configured without the “log” option.
%ASA-4-106100: access-list acl_ID denied protocol
interface_name/source_address(source_port) -
interface_name/dest_address(dest_port) hit-cnt number ({first hit | number-
secondinterval}) hash codes
The following message will be generated when these rules are configured
with the “log” option:
asa(config)#object-group network grp_name
asa(config-network-object-group)#network-object :: #IPv6 unspecified
asa(config-network-object-group)#network-object 0000::/8 #IPv6 reserved
asa(config)#access-list acl-name extended deny ip grp-name any [log]
asa(config)#access-list acl-name extended deny ip any grp-name [log]
asa(config)#access-group in interface int-name
12. Packets with the IP options: Loose Source Routing, Strict Source Routing, or
Record Route specified;
%ASA-6-106012: Deny IP from IP_address to IP_address, IP options hex.
The following messages will be generated when configured as described
above.
%ASA-4-400001: IPS:1001 IP options-Record Packet Route from IP_address to IP_address
on interface interface_name
%ASA-4-400004: IPS:1004 IP options-Loose Source Route from IP_address to IP_address
on interface interface_name
%ASA-4-400006: IPS:1006 IP options-Strict Source Route from IP_address to IP_address
on interface interface_name
13. By default, ASA will also drop (and is capable of logging) a variety of other IP
packets with invalid content including:
 Invalid source and/or destination IP address including:
o source or destination is the network address (e.g. 0.0.0.0)
o source and destination address are the same (with or without the
source and destination ports being the same)
o first octet of the source IP is equal to zero
o network part of the source IP is equal to all zeros or all ones
o host part of the source IP is equal to all zeros or all ones
Invalid ICMP packets including: sequence number mismatch; invalid ICMP code,
and ICMP responses unrelated to any established ICMP session
FFW_RUL_EXT.1.8 ASA Only
The TOE administrators have control over the sequencing of access control entries
(ACEs) within an access control list (ACL) to be able to set the sequence in which
ACEs are applied within any ACL. The entries within an ACL are always applied in
a top-down sequence, and the first entry that matches the traffic is the one that’s
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applied, regardless of whether there may be a more precise match for the traffic
further down in the ACL. By changing the ordering/numbering of entries within an
ACL, the administrator chances the sequence in which the entries are compared to
network traffic flows.
FFW_RUL_EXT.1.9 ASA Only
An implicit “deny-all” rule is applied to all interfaces to which any traffic filtering
rule has been applied. The implicit deny-all rule is executed after all admin-defined
rules have been executed, and will result in dropping all traffic that has not been
explicitly permitted, or explicitly denied. If an administrator wants to log all denied
traffic, a rule entry should be added that denies all traffic and logs it, e.g. “access-list
sample-acl deny ip any any log”.
FFW_RUL_EXT.1.10 ASA Only
The TOE administrators can configure the maximum number of half-open TCP
connections allowed using the “set connection embryonic-conn-max 0-65535” in the
service-policy command. After the configured limit is reached, the TOE will act as a
proxy for the server and generates a SYN-ACK response to new client SYN request.
When the ASA receives an ACK back from the client, it can then authenticate that
the client is real and allow the connection to the server. If an ACK is not received in
the configurable time frame, the session is closed, resource is returned to the free
pool, and it will be counted. The default idle time until a TCP half-open connection
closes is 10 minutes.
FFW_RUL_EXT.2 ASA Only
The ASA supports numerous TCP and UDP protocols that require dynamic
establishment of secondary network sessions including FTP. The ASA will manage
establishment and teardown of the following protocols in accordance with the RFC
for each protocol:
 FTP (File Transfer Protocol) is a TCP protocol supported in either active or
passive mode:
o In active mode the client initiates the control session, and the server
initiates the data session to a client port provided by the client;
o For active FTP to be allowed through the TOE, the firewall rules must
explicitly permit the control session from the client to the server, and
“inspect ftp” must be enabled. The TOE will then explicitly permit a
control session to be initiated from the client to the server, and implicitly
permit data sessions to be initiated from the server to the client while the
control session is active.
o In passive (PASV) mode, the client initiates the control session, and the
client also initiates the data session to a secondary port provided to the
client by the server.
For passive FTP to be permitted through the ASA, the firewall rules must explicitly
permit the control session from the client to the server, and “inspect ftp” must be
enabled with the “match passive-ftp” option enabled. That feature will cause the
ASA to look for the PASV or EPSV commands in the FTP control traffic and for the
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server’s destination port, and dynamically permit the data session.
Reproduced from the VPNGWcEP
FCS_CKM.1/IKE [VPN] See FCS_CKM.1
FCS_COP.1(1)[VPN] See FCS_COP.1(1)
FCS_IPSEC_EXT.1
[VPN]
See FCS_IPSEC_EXT.1
FIA_AFL.1[VPN] ASA
The ASA provides the privileged administrator the ability to specify the maximum
number of unsuccessful authentication attempts (between 1 and 16) before
privileged administrator or non-privileged administrator is locked out.
When a privileged administrator or non-privileged administrator attempting to login
reaches the administratively set maximum number of failed authentication attempts,
the user will not be granted access to the administrative functionality of the TOE
until a privileged administrator resets the user's number of failed login attempts (i.e.,
unlocks) through the administrative CLI.
FXOS
FXOS will allow a maximum number of failed login attempts before a user is locked
out of the system for a specified amount of time. If a user exceeds the set maximum
number of login attempts, the user will be locked out of the system. In this event, the
user must wait the specified amount of time before attempting to log in.
• All types of user accounts (including account type 'admin') are locked out of the
system after exceeding the maximum number of login attempts.
• The default maximum number of unsuccessful login attempts is '3'. The default
amount of time the user is locked out of the system after exceeding the
maximum number of login attempts is 30 minutes (3600 seconds).
FIA_PSK_EXT.1 [VPN] ASA Only
The ASA supports use of IKEv2 pre-shared keys for authentication of IPsec tunnels.
Pre-shared keys can be entered as ASCII character strings, or HEX values. The text-
based pre-shared keys can be composed of any combination of upper and lower case
letters, numbers, and special characters. The TOE supports keys that are from 1
character in length up to 128 in length. The text-based pre-shared key is conditioned
by one of the prf functions (HMAC-SHA-1, HMAC-SHA-256, HMAC-SHA-384, or
HMAC-SHA-512) configured by the administrator.
FIA_X509_EXT.4[VPN] See FIA_X509_EXT.x
FMT_MTD.1/AdminAct
[VPN]
The TOE only provides the ability for authorized administrators to access TOE data,
such as audit data, configuration data, security attributes (such as cryptographic keys
and certificates used in VPN), routing tables, and session thresholds.
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FPF_RUL_EXT.1
[VPN]
ASA Only
An authorized administrator can define the traffic that needs to be protected by
configuring access lists (permit, deny, log) and applying these access lists to
interfaces using access and crypto map sets. Therefore, traffic may be selected on the
basis of the source and destination address, and optionally the Layer 4 protocol and
port.
The ASA enforces information flow policies on network packets that are received by
ASA interfaces and leave the ASA through other ASA interfaces. When network
packets are received on a ASA interface, the ASA verifies whether the network
traffic is allowed or not and performs one of the following actions, pass/not pass
information, as well as optional logging.
The ASA implements rules that define the permitted flow of traffic between
interfaces of the ASA for unauthenticated traffic. These rules control whether a
packet is transferred from one interface to another based on:
1. Presumed address of source
2. Presumed address of destination
3. Transport layer protocol (or next header in IPv6)
4. Service used (UDP or TCP ports, both source and destination)
5. Network interface on which the connection request occurs
These rules are supported for the following protocols: RFC 791(IPv4); RFC 2460
(IPv6); RFC 793 (TCP); RFC 768 (UDP). ASA compliance with these protocols is
verified via regular quality assurance, regression, and interoperability testing.
Packets will be dropped unless a specific rule has been set up to allow the packet to
pass (where the attributes of the packet match the attributes in the rule and the action
associated with the rule is to pass traffic). Rules are enforced on a first match basis
from the top down. As soon as a match is found the action associated with the rule is
applied.
These rules are entered in the form of access lists at the CLI (via ‘access list’ and
‘access group’ commands). These interfaces reject traffic when the traffic arrives on
an external ASA interface, and the source address is an external IT entity on an
internal network;
These interfaces reject traffic when the traffic arrives on an internal ASA interface,
and the source address is an external IT entity on the external network;
These interfaces reject traffic when the traffic arrives on either an internal or external
ASA interface, and the source address is an external IT entity on a broadcast
network;
These interfaces reject traffic when the traffic arrives on either an internal or external
ASA interface, and the source address is an external IT entity on the loopback
network;
These interfaces reject requests in which the subject specifies the route for
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information to flow when it is in route to its destination; and
For application protocols supported by the ASA (e.g., DNS, HTTP, SMTP, and
POP3), these interfaces deny any access or service requests that do not conform to
its associated published protocol specification (e.g., RFC). This is accomplished
through protocol filtering proxies that are designed for that purpose.
Otherwise, these interfaces pass traffic only when its source address matches the
network interface originating the traffic to the network interface corresponding to the
traffic’s destination address.
During the boot cycle, the ASA first powers on hardware, loads the image, and
executes the power on self-tests. Until the power on self tests successfully complete,
the interfaces to the ASA are deactivated. Once the tests complete, the interfaces
become active and the rules associated with the interface become immediately
operational. There is no state during initialization/ startup that the access lists are not
enforced on an interface.
During initialization/startup (while the ASA is booting) the configuration has yet to
be loaded, and no traffic can flow through any of its interfaces. No traffic can flow
through the ASA interfaces until the POST has completed, and the configuration has
been loaded. If any aspect of the POST fails during boot, the ASA will reload
without forwarding traffic. If a critical component of the ASA, such as the clock or
cryptographic modules, fails while the ASA is in an operational state, the ASA will
reload, which stops the flow of traffic. If a component such as a network interface,
which is not critical to the operation of the ASA, but may be critical to one or more
traffic flows, fails while the ASA is operational, the ASA will continue to function,
though all traffic flows through the failed network interface(s) will be dropped.
FPT_FLS.1/SelfTest
[VPN]
ASA Only
Noise source health tests are run both periodically and at start-up to determine the
functional health of the noise source. These tests are specifically designed to catch
catastrophic losses in the overall entropy associated with the noise source. Tests are
run on the raw noise output, before the application of any conditioners. If a noise
source fails the health test either at start-up or after the device is operational, the
platform will be shut down.
Whenever a failure (e.g., POST or integrity test fails) occurs within the ASA that
results in the ASA ceasing operation, the ASA securely disables its interfaces to
prevent the unintentional flow of any information to or from the ASA and reloads.
So long as the failures persist, the ASA will continue to reload. This functionally
prevents any failure from causing an unauthorized information flow. There are no
failures that circumvent this protection.
FPT_TST_EXT.2.1
[VPN]
See FPT_TST_EXT.1
FPT_TUD_EXT.1.3
[VPN]
See FPT_TUD_EXT.1
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FTA_SSL.3[VPN] ASA Only
When a remote VPN client session reaches a period of inactivity, its connection is
terminated and it must re-establish the connection with new authentication to resume
operation. This period of inactivity is set by the administrator using vpn-idle-timeout
or default-idle-timeout commands in the VPN configuration.
FTA_TSE.1[VPN] ASA Only
The ASA allows for creation of acls that restrict VPN connectivity based client’s IP
address (location). These ACLs allow customization of all of these properties to
allow or deny access. In addition, the vpn-access-hours command can be used to
restrict access based on date and time.
FTA_VCM_EXT.1
[VPN]
ASA Only
The ASA provides the option to assign the remotely connecting VPN client an
internal network IP address. The ip-local-pool command can be used to define the
range of IP and IPv6 addresses to be available for use.
FTP_ITC.1.1[VPN] See FTP_ITC.1
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7 SUPPLEMENTAL TOE SUMMARY SPECIFICATION INFORMATION
7.1 Tracking of Stateful Firewall Connections
7.1.1 Establishment and Maintenance of Stateful Connections
As network traffic enters an interface of the TOE, the TOE inspects the packet header
information to determine whether the packet is allowed by access control lists, and whether an
established connection already exists for that specific traffic flow. The TOE maintains and
continuously updates connection state tables to keep tracked of establishment, teardown, and
open sessions. To help determine whether a packet can be part of a new session or an
established session, the TOE uses information in the packet header and protocol header fields to
determine the session state to which the packet applies as defined by the RFC for each protocol.
7.1.2 Viewing Connections and Connection States
To display the connection state for the designated connection type, use the show conn command
in privileged EXEC mode. This command supports IPv4 and IPv6 addresses. The syntax is:
show conn [count | [all] [detail] [long] [state state_type] [protocol {tcp | udp}] [scansafe] [address src_ip[-
src_ip] [netmask mask]] [port src_port[-src_port]] [address dest_ip[-dest_ip] [netmask mask]] [port dest_port[-
dest_port]] [user-identity | user [domain_nickname\]user_name | user-group
[domain_nickname\\]user_group_name] | security-group]
The show conn command displays the number of active TCP and UDP connections, and
provides information about connections of various types. By default, the output of “show conn”
shows only the through-the-TOE connections. To include connections to/from the TOE itself in
the command output, add the all keyword, “show conn all”.
Table 19: Syntax Description
address (Optional) Displays connections with the specified source or destination IP address.
all (Optional) Displays connections that are to the device or from the device, in addition to
through-traffic connections.
count (Optional) Displays the number of active connections.
dest_ip (Optional) Specifies the destination IP address (IPv4 or IPv6). To specify a range, separate
the IP addresses with a dash (-). For example:
10.1.1.1-10.1.1.5
dest_port (Optional) Specifies the destination port number. To specify a range, separate the port
numbers with a dash (-). For example:
1000-2000
detail (Optional) Displays connections in detail, including translation type and interface
information.
Cisco FP 4100 and 9300 Security Target
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long (Optional) Displays connections in long format.
netmask mask (Optional) Specifies a subnet mask for use with the given IP address.
port (Optional) Displays connections with the specified source or destination port.
protocol {tcp | udp} (Optional) Specifies the connection protocol, which can be tcp or udp.
scansafe (Optional) Shows connections being forwarded to the Cloud Web Security server.
security-group (Optional) Specifies that all connections displayed belong to the specified security group.
src_ip (Optional) Specifies the source IP address (IPv4 or IPv6). To specify a range, separate the
IP addresses with a dash (-). For example:
10.1.1.1-10.1.1.5
src_port (Optional) Specifies the source port number. To specify a range, separate the port numbers
with a dash (-). For example:
1000-2000
state state_type (Optional) Specifies the connection state type. See Table 46-5 for a list of the keywords
available for connection state types.
user
[domain_nickname\]
user_name
(Optional) Specifies that all connections displayed belong to the specified user. When you
do not include the domain_nickname argument, the TOE displays information for the user
in the default domain.
user-group
[domain_nickname\\]
user_group_name
(Optional) Specifies that all connections displayed belong to the specified user group.
When you do not include the domain_nickname argument, the TOE displays information
for the user group in the default domain.
user-identity (Optional) Specifies that the TOE display all connections for the Identity Firewall feature.
When displaying the connections, the TOE displays the user name and IP address when it
identifies a matching user. Similarly, the TOE displays the host name and an IP address
when it identifies a matching host.
The connection types that you can specify using the show conn state command are defined in
the table below. When specifying multiple connection types, use commas without spaces to
separate the keywords.
Table 20: Connection State Types
Keyword Connection Type Displayed
up Connections in the up state.
conn_inbound Inbound connections.
ctiqbe CTIQBE connections
data_in Inbound data connections.
data_out Outbound data connections.
finin FIN inbound connections.
finout FIN outbound connections.
h225 H.225 connections
h323 H.323 connections
http_get HTTP get connections.
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mgcp MGCP connections.
nojava Connections that deny access to Java applets.
rpc RPC connections.
service_module Connections being scanned by an SSM.
sip SIP connections.
skinny SCCP connections.
smtp_data SMTP mail data connections.
sqlnet_fixup_data SQL*Net data inspection engine connections.
tcp_embryonic TCP embryonic connections.
vpn_orphan Orphaned VPN tunneled flows.
When using the detail option, the TOE displays information about the translation type and
interface information using the connection flags defined in the table below.
Table 21: Connection State Flags
Flag Description
a awaiting outside ACK to SYN
A awaiting inside ACK to SYN
b TCP state bypass. By default, all traffic that passes through the Cisco Adaptive Security Appliance
(ASA) is inspected using the Adaptive Security Algorithm and is either allowed through or dropped
based on the security policy. In order to maximize the firewall performance, the ASA checks the state of
each packet (for example, is this a new connection or an established connection?) and assigns it to either
the session management path (a new connection SYN packet), the fast path (an established connection),
or the control plane path (advanced inspection). TCP packets that match existing connections in the fast
path can pass through the adaptive security appliance without rechecking every aspect of the security
policy. This feature maximizes performance.
B initial SYN from outside
C Computer Telephony Interface Quick Buffer Encoding (CTIQBE) media connection
d dump
D DNS
E outside back connection. This is a secondary data connection that must be initiated from the inside host.
For example, using FTP, after the inside client issues the PASV command and the outside server accepts,
the ASA preallocates an outside back connection with this flag set. If the inside client attempts to
connect back to the server, then the ASA denies this connection attempt. Only the outside server can use
the preallocated secondary connection.
f inside FIN
F outside FIN
g Media Gateway Control Protocol (MGCP) connection
G connection is part of a group
The G flag indicates the connection is part of a group. It is set by the GRE and FTP Strict fixups to
designate the control connection and all its associated secondary connections. If the control connection
terminates, then all associated secondary connections are also terminated.
h H.225
H H.323
i incomplete TCP or UDP connection
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I inbound data
k Skinny Client Control Protocol (SCCP) media connection
K GTP t3-response
m SIP media connection
M SMTP data
O outbound data
p replicated (unused)
P inside back connection
This is a secondary data connection that must be initiated from the inside host. For example, using FTP,
after the inside client issues the PORT command and the outside server accepts, the ASA preallocates an
inside back connection with this flag set. If the outside server attempts to connect back to the client, then
the ASA denies this connection attempt. Only the inside client can use the preallocated secondary
connection.
q SQL*Net data
r inside acknowledged FIN
R If TCP: outside acknowledged FIN for TCP connection
If UDP: UDP RPC2
Because each row of “show conn” command output represents one connection (TCP or UDP), there will
be only one R flag per row.
s awaiting outside SYN
S awaiting inside SYN
t SIP transient connection
For a UDP connection, the value t indicates that it will timeout after one minute.
T SIP connection
For UDP connections, the value T indicates that the connection will timeout according to the value
specified using the “timeout sip” command.
U up
V VPN orphan
W WAAS
X Inspected by the service module, such as a CSC SSM.
y For clustering, identifies a backup owner flow.
Y For clustering, identifies a director flow.
z For clustering, identifies a forwarder flow.
Z Cloud Web Security
A single connection is created for multiple DNS sessions, as long as they are between the same
two hosts, and the sessions have the same 5-tuple (source/destination IP address,
source/destination port, and protocol). DNS identification is tracked by app_id, and the idle timer
for each app_id runs independently. Because the app_id expires independently, a legitimate DNS
response can only pass through the TOE within a limited period of time and there is no resource
build-up. However, when the show conn command is entered, you will see the idle timer of a
Cisco Adaptive Security Appliances Security Target
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DNS connection being reset by a new DNS session. This is due to the nature of the shared DNS
connection and is by design.
When the TOE creates a pinhole to allow secondary connections, this is shown as an incomplete
conn by the show conn command. Incomplete connections will be cleared from the connections
table when they reach their timeout limit, and can be cleared manually by using the “clear conn”
command. When there is no TCP traffic for the period of inactivity defined by the timeout conn
command (by default, 1:00:00), the connection is closed and the corresponding conn flag entries
are no longer displayed.
If a LAN-to-LAN/Network-Extension Mode tunnel drops and does not come back, there might
be a number of orphaned tunnel flows. These flows are not torn down as a result of the tunnel
going down, but all the data attempting to flow through them is dropped. The show conn
command output shows these orphaned flows with the V flag.
Table 22: TCP connection directionality flags
Flag Description
B Initial SYN from outside
a Awaiting outside ACK to SYN
A Awaiting inside ACK to SYN
f Inside FIN
F Outside FIN
s Awaiting outside SYN
S Awaiting inside SYN
7.1.3 Examples
The following is sample output from the show conn command. This example shows a TCP
session connection from inside host 10.1.1.15 to the outside Telnet server at 10.10.49.10.
Because there is no B flag, the connection is initiated from the inside. The "U", "I", and "O" flags
denote that the connection is active and has received inbound and outbound data.
hostname# show conn
54 in use, 123 most used
TCP out 10.10.49.10:23 in 10.1.1.15:1026 idle 0:00:22, bytes 1774, flags UIO
UDP out 10.10.49.10:31649 in 10.1.1.15:1028 idle 0:00:14, bytes 0, flags D-
TCP dmz 10.10.10.50:50026 inside 192.168.1.22:5060, idle 0:00:24, bytes 1940435, flags UTIOB
TCP dmz 10.10.10.50:49764 inside 192.168.1.21:5060, idle 0:00:42, bytes 2328346, flags UTIOB
TCP dmz 10.10.10.51:50196 inside 192.168.1.22:2000, idle 0:00:04, bytes 31464, flags UIB
TCP dmz 10.10.10.51:52738 inside 192.168.1.21:2000, idle 0:00:09, bytes 129156, flags UIOB
TCP dmz 10.10.10.50:49764 inside 192.168.1.21:0, idle 0:00:42, bytes 0, flags Ti
TCP outside 192.168.1.10(20.20.20.24):49736 inside 192.168.1.21:0, idle 0:01:32, bytes 0, flags Ti
TCP dmz 10.10.10.50:50026 inside 192.168.1.22:0, idle 0:00:24, bytes 0, flags Ti
TCP outside 192.168.1.10(20.20.20.24):50663 inside 192.168.1.22:0, idle 0:01:34, bytes 0, flags Ti
TCP dmz 10.10.10.50:50026 inside 192.168.1.22:0, idle 0:02:24, bytes 0, flags Ti
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TCP outside 192.168.1.10(20.20.20.24):50663 inside 192.168.1.22:0, idle 0:03:34, bytes 0, flags Ti
TCP dmz 10.10.10.50:50026 inside 192.168.1.22:0, idle 0:04:24, bytes 0, flags Ti
TCP outside 192.168.1.10(20.20.20.24):50663 inside 192.168.1.22:0, idle 0:05:34, bytes 0, flags Ti
TCP dmz 10.10.10.50:50026 inside 192.168.1.22:0, idle 0:06:24, bytes 0, flags Ti
TCP outside 192.168.1.10(20.20.20.24):50663 inside 192.168.1.22:0, idle 0:07:34, bytes 0, flags Ti
The following is sample output from the show conn detail command. This example shows a
UDP connection from outside host 10.10.49.10 to inside host 10.1.1.15. The D flag denotes that
this is a DNS connection. The number 1028 is the DNS ID over the connection.
hostname# show conn detail
54 in use, 123 most used
Flags: A - awaiting inside ACK to SYN, a - awaiting outside ACK to SYN,
B - initial SYN from outside, b - TCP state-bypass or nailed, C - CTIQBE media,
D - DNS, d - dump, E - outside back connection, F - outside FIN, f - inside FIN,
G - group, g - MGCP, H - H.323, h - H.225.0, I - inbound data,
i - incomplete, J - GTP, j - GTP data, K - GTP t3-response
k - Skinny media, M - SMTP data, m - SIP media, n - GUP
O - outbound data, P - inside back connection, p - Phone-proxy TFTP connection,
q - SQL*Net data, R - outside acknowledged FIN,
R - UDP SUNRPC, r - inside acknowledged FIN, S - awaiting inside SYN,
s - awaiting outside SYN, T - SIP, t - SIP transient, U - up,
V - VPN orphan, W - WAAS,
X - inspected by service module
TCP outside:10.10.49.10/23 inside:10.1.1.15/1026, flags UIO, idle 39s, uptime 1D19h, timeout 1h0m, bytes 1940435
UDP outside:10.10.49.10/31649 inside:10.1.1.15/1028, flags dD, idle 39s, uptime 1D19h, timeout 1h0m, bytes 1940435
TCP dmz:10.10.10.50/50026 inside:192.168.1.22/5060, flags UTIOB, idle 39s, uptime 1D19h, timeout 1h0m, bytes 1940435
TCP dmz:10.10.10.50/49764 inside:192.168.1.21/5060, flags UTIOB, idle 56s, uptime 1D19h, timeout 1h0m, bytes 2328346
TCP dmz:10.10.10.51/50196 inside:192.168.1.22/2000, flags UIB, idle 18s, uptime 1D19h, timeout 1h0m, bytes 31464
TCP dmz:10.10.10.51/52738 inside:192.168.1.21/2000, flags UIOB, idle 23s, uptime 1D19h, timeout 1h0m, bytes 129156
TCP outside:10.132.64.166/52510 inside:192.168.1.35/2000, flags UIOB, idle 3s, uptime 1D21h, timeout 1h0m, bytes 357405
TCP outside:10.132.64.81/5321 inside:192.168.1.22/5060, flags UTIOB, idle 1m48s, uptime 1D21h, timeout 1h0m, bytes 2083129
TCP outside:10.132.64.81/5320 inside:192.168.1.21/5060, flags UTIOB, idle 1m46s, uptime 1D21h, timeout 1h0m, bytes 2500529
TCP outside:10.132.64.81/5319 inside:192.168.1.22/2000, flags UIOB, idle 31s, uptime 1D21h, timeout 1h0m, bytes 32718
TCP outside:10.132.64.81/5315 inside:192.168.1.21/2000, flags UIOB, idle 14s, uptime 1D21h, timeout 1h0m, bytes 358694
TCP outside:10.132.64.80/52596 inside:192.168.1.22/2000, flags UIOB, idle 8s, uptime 1D21h, timeout 1h0m, bytes 32742
TCP outside:10.132.64.80/52834 inside:192.168.1.21/2000, flags UIOB, idle 6s, uptime 1D21h, timeout 1h0m, bytes 358582
TCP outside:10.132.64.167/50250 inside:192.168.1.35/2000, flags UIOB, idle 26s, uptime 1D21h, timeout 1h0m, bytes 375617
7.2 Key Zeroization
The following table describes the key zeroization referenced by FCS_CKM.4 provided by the
TOE.
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Table 23: TOE Key Zeroization
Critical Security Parameters
(CSPs)
Zeroization Cause and Effect
Diffie-Hellman Shared Secret Automatically zeroized after completion of DH exchange, by calling a specific
API within the two crypto modules, when module is shutdown, or
reinitialized.
Overwritten with: 0x00
Diffie Hellman Private and Public
Exponent
Automatically zeroized upon completion of DH exchange, by calling a
specific API within the two crypto modules, and when module is shutdown, or
reinitialized.
Overwritten with: 0x00
skeyid Session Encryption Key and IKE Session Authentication Key. Automatically
zeroized after IKE session terminated.
Overwritten with: 0x00
skeyid_d Session Encryption Key and IKE Session Authentication Key. Automatically
zeroized after IKE session terminated.
Overwritten with: 0x00
IKE Session Encryption Key Session Encryption Key and IKE Session Authentication Key. Automatically
zeroized after IKE session terminated.
Overwritten with: 0x00
IKE Session Authentication Key Session Encryption Key and IKE Session Authentication Key. Automatically
zeroized after IKE session terminated.
Overwritten with: 0x00
ISAKMP Preshared Zeroized using the following command:
# no crypto isakmp key
Overwritten with: 0x00
IKE RSA and ECDSA Private and
Public Keys
Automatically overwritten when a new key is generated or zeroized using the
following commands:
# crypto key zeroize rsa
# crypto key zeroize ec
Overwritten with: 0x00
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Critical Security Parameters
(CSPs)
Zeroization Cause and Effect
IPsec Encryption Key Automatically zeroized when IPsec session terminated.
Overwritten with: 0x00
IPsec Authentication Key Automatically zeroized when IPsec session terminated.
Overwritten with: 0x00
RADIUS Secret Zeroized using the following command:
# no radius-server key
Overwritten with: 0x00
TACACS+ Secret Zeroized using the following command:
# no tacacs-server key
Overwritten with: 0x00
SSHv2 Private and Public Key Automatically zeroized upon generation of a new key
Overwritten with: 0x00
SSHv2 Session Key Automatically zeroized when the SSH session is terminated.
Overwritten with: 0x00
All CSPs Zeroized on-demand on all file systems via the “erase” command.
TLS Server Private Key Zeroized when the HTTPS server is no longer in use.
Overwritten with: 0x00
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8 ANNEX A: REFERENCES
The following documentation was used to prepare this ST:
Table 24: References
Identifier Description
[CC_PART1] Common Criteria for Information Technology Security Evaluation – Part 1: Introduction
and general model, dated September 2012, version 3.1, Revision 4, CCMB-2012-009-001
[CC_PART2] Common Criteria for Information Technology Security Evaluation – Part 2: Security
functional components, dated September 2012, version 3.1, Revision 4, CCMB-2012-009-
002
[CC_PART3] Common Criteria for Information Technology Security Evaluation – Part 3: Security
assurance components, dated September 2012, version 3.1, Revision 4, CCMB-2012-009-
003
[CEM] Common Methodology for Information Technology Security Evaluation – Evaluation
Methodology, dated September 2012, version 3.1, Revision 4, CCMB-2012-009-004
[800-38A] NIST Special Publication 800-38A Recommendation for Block 2001 Edition
Recommendation for Block Cipher Modes of Operation Methods and Techniques December
2001
[800-56A] NIST Special Publication 800-56A, March, 2007
Recommendation for Pair-Wise Key Establishment Schemes Using Discrete Logarithm
Cryptography (Revised)
[800-56B] NIST Special Publication 800-56B Recommendation for Pair-Wise, August 2009
Key Establishment Schemes Using Integer Factorization Cryptography
[FIPS 140-2] FIPS PUB 140-2 Federal Information Processing Standards Publication
Security Requirements for Cryptographic Modules May 25, 2001
[FIPS PUB 186-4] FIPS PUB 186-3 Federal Information Processing Standards Publication Digital Signature
Standard (DSS) July 2013
[FIPS PUB 198-1] Federal Information Processing Standards Publication The Keyed-Hash Message
Authentication Code (HMAC) July 2008
[800-90] NIST Special Publication 800-90A Recommendation for Random Number Generation
Using Deterministic Random Bit Generators January 2012
[FIPS PUB 180-4] FIPS PUB 180-4 Federal Information Processing Standards Publication Secure Hash
Standard (SHS) March 2012