Security Target
V100R019C10
Huawei OptiX RTN 900 Series Software Management
Component
Issue v2.0
Date 2020-11-25
HUAWEI TECHNOLOGIES CO., LTD.
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. i
Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
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and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees or
representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: https://www.huawei.com
Email: support@huawei.com
1 Introduction
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 1
About This Document
Purpose
This Security Target is for the evaluation of OptiX RTN 900 Series (905 2F/910A/950A)
software management component, consisting of unified transmission software (UTS). The
software is part of OptiX RTN 905 2F/ OptiX RTN 910A/ OptiX RTN 950A.
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
1 Introduction
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 2
Date Version Change Description Author
2020-06-23 v1.0 Initial Draft Huang Chao, He
Jinguang
2020-10-31 v1.1 Minor update He Jinguang
2020-11-09 v1.2 Minor update He Jinguang
2020-11-25 v2.0 Release He Jinguang
1 Introduction
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 3
Contents
About This Document........................................................................................................................1
1 Introduction....................................................................................................................................5
1.1 ST Identification ...........................................................................................................................................................5
1.2 TOE Identification ........................................................................................................................................................5
1.3 Product overview..........................................................................................................................................................6
1.4 TOE Overview..............................................................................................................................................................7
1.5 TOE Description...........................................................................................................................................................8
1.5.1.1 Physical scope.........................................................................................................................................................8
1.5.1.2 Logical scope........................................................................................................................................................10
1.5.2 Non-TOE Hardware and Software...........................................................................................................................14
2 CC Conformance Claims ...........................................................................................................16
2.1 CC Conformance Claim..............................................................................................................................................16
3 Security Problem Definition.....................................................................................................17
3.1 Asset ...........................................................................................................................................................................17
3.2 Threats ........................................................................................................................................................................17
3.2.1 Threats .....................................................................................................................................................................17
3.2.2 Threats Components ................................................................................................................................................18
3.3 Organizational Security Policies.................................................................................................................................18
3.4 Assumptions................................................................................................................................................................19
4 Security Objectives.....................................................................................................................21
4.1 Security Objectives for the TOE.................................................................................................................................21
4.2 Security Objectives for the Operational Environment ................................................................................................21
4.3 Rationale for Security Objectives ...............................................................................................................................22
5 Security Requirements for the TOE ........................................................................................24
5.1 Conventions................................................................................................................................................................24
5.2 Security Functional Requirements..............................................................................................................................25
5.2.1 Security Audit (FAU)...............................................................................................................................................25
5.2.1.1 FAU_GEN.1 Audit Data Generation ....................................................................................................................25
5.2.1.2 FAU_GEN.2 User Identity Association ................................................................................................................26
5.2.1.3 FAU_SAR.1 Audit Review...................................................................................................................................26
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5.2.1.4 FAU_SAR.2 Restricted Audit Review..................................................................................................................26
5.2.1.5 FAU_STG.1 Protected Audit Trail Storage...........................................................................................................26
5.2.1.6 FAU_STG.3 Action in Case of Possible Audit Data Loss ....................................................................................26
5.2.2 User Data Protection (FDP).....................................................................................................................................26
5.2.2.7 FDP_ACC.1 Subset Access Control ................................................................................................................26
5.2.2.8 FDP_ACF.1 Security Attribute based Access Control .....................................................................................26
5.2.2.9 FDP_IFC.1 Subset Information Flow Control.................................................................................................28
5.2.2.10 FDP_IFF.1 Simple Security Attributes ..........................................................................................................28
5.2.3 Identification and Authentication (FIA)...................................................................................................................28
5.2.3.11 FIA_AFL.1 Authentication Failure Handling................................................................................................28
5.2.3.12 FIA_ATD.1 User Attribute Definition ...........................................................................................................29
5.2.3.13 FIA_UAU.2 User authentication before any action.......................................................................................29
5.2.3.14 FIA_UAU.5 Multiple Authentication Mechanisms .......................................................................................29
5.2.3.15 FIA_UID.2 User identification before any action..........................................................................................30
5.2.4 Security Management (FMT) ..................................................................................................................................30
5.2.4.16 FMT_MOF.1 Management of Security Functions Behavior .........................................................................30
5.2.4.17 FMT_MSA.1/ACFATD Management of Security Attributes (user group SFP) ............................................30
5.2.4.18 FMT_MSA.1/IFF Management of Security Attributes..................................................................................30
5.2.4.19 FMT_MSA.3/ACFATD Static Attribute Initialization...................................................................................30
5.2.4.20 FMT_MSA.3/IFF Static Attribute Initializatio ..............................................................................................30
5.2.4.21 FMT_SMF.1 Specification of Management Functions..................................................................................31
5.2.4.22 FMT_SMR.1 Security Roles .........................................................................................................................31
5.2.5 TOE access (FTA)....................................................................................................................................................32
5.2.5.23 FTA_SSL.3 TSF-initiated Termination..........................................................................................................32
5.2.5.24 FTA_TSE.1 TOE Session Establishment.......................................................................................................32
5.2.6 Trusted Path/Channels (FTP)...................................................................................................................................32
5.2.6.25 FTP_ITC.1/TLS Inter-TSF trusted channel ...................................................................................................32
5.2.6.26 FTP_ITC.1/SFTP Inter-TSF trusted channel ......................................................................................................32
5.3 Security Functional Requirements Rationale..............................................................................................................33
5.3.1 Coverage..................................................................................................................................................................33
5.3.2 Sufficiency...............................................................................................................................................................34
5.3.3 Security Requirements Dependency Rationale........................................................................................................36
5.4 Security Assurance Requirements...............................................................................................................................37
5.5 Security Assurance Requirements Rationale ..............................................................................................................37
6 TOE Summary Specification ....................................................................................................39
6.1 Authentication.............................................................................................................................................................39
6.2 Authorization ..............................................................................................................................................................41
6.3 Auditing ......................................................................................................................................................................44
6.4 Communication Security ............................................................................................................................................45
6.5 Management Traffic Flow Control .............................................................................................................................48
6.6 Security Management .................................................................................................................................................49
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6.7 Time............................................................................................................................................................................50
A Abbreviations, Terminology and References.........................................................................1
A.1 Abbreviations...............................................................................................................................................................1
A.2 Terminology.................................................................................................................................................................2
A.3 References....................................................................................................................................................................2
1 Introduction
This Security Target is for the evaluation of OptiX RTN 900 Series (905 2F/910A/950A)
software management component, consisting of unified transmission software (UTS). The
software is part of OptiX RTN 905 2F/ OptiX RTN 910A/ OptiX RTN 950A.
1.1 ST Identification
Title: Security Target for Huawei OptiX RTN 900 Series Software Management Component
Version: v2.0
Date: 2020-11-25
Developer: Huawei Technologies Co., Ltd.
1.2 TOE Identification
Name: Huawei OptiX RTN 900 Series Software Management Component
Version: V100R019C10SPC200
Developer: Huawei Technologies Co., Ltd.
VRC versions are defined as follows:
 V version is the version of the software or hardware platform that a product bases.
 R version is released for customer at a specific time. It is a collection of features that is
embodied in the form of a product.
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Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 6
 C version is the customized version developed based on the R version to fast meet
customer demands.
 SPC version is the cold service patch version.
The TOE is part of the OptiX RTN 905 2F/910A/950A software which is the software running
on the OptiX RTN 905 2F/910A/950A device. The TOE only consists of the unified
transmission software (UTS) as described in the following chapters.
1.3 Product overview
The OptiX RTN 900 Series is a new generation TDM/Hybrid/Packet/Routing
integrated microwave transmission system developed by Huawei. It provides a seamless
microwave transmission solution for mobile communication network or private networks.
The OptiX RTN 900 Series provide various service interfaces and can be installed easily and
configured flexibly. The OptiX RTN 900 Series provide a solution that can integrate TDM
microwave, Hybrid microwave, Packet microwave, and Routing microwave technologies
according to the networking scheme for the sites, achieving smooth upgrade from TDM
microwave to Hybrid microwave, from Hybrid microwave to Packet microwave, and from
Packet microwave to Routing microwave. This solution meets the transmission requirements
of 2G, 3G, and LTE services while also allowing for future network evolution and
convergence.
For example, the OptiX RTN 910A provides a generic platform for
TDM/Hybrid/Packet/Routing microwave transmission, meeting the backhaul requirements of
various mobile networks. The OptiX RTN 910A is highly integrated microwave equipment,
with one 1 U chassis supporting a maximum of six microwave links. The OptiX RTN 910A is
mainly used at the access and aggregation layers. Figure 1-1 shows the microwave
transmission solution provided by the OptiX RTN 910A. This solution is mainly used for base
station service backhaul on 2G and 3G networks.
Figure 1-1 transmission solution provided by the OptiX RTN 910A
During the transmission, transmission equipment encapsulates client services into signals of
certain rates, performs error control, and monitors the quality of the signals. To achieve
transparent transmission, the transmission equipment does not process client services
transmitted from other equipment.
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Located at the transmission layer of a communication network, Huawei transmission
equipment provides large-capacity and high-reliability transparent transmission tunnels, and is
almost invisible to end users.
A Transmission layer of a communication network divide into three layers:
 the access layer of the network,
 the aggregation layer of the network,
 the core or backbone core layer of the network.
The access layer of the network is mainly responsible for the access control of the services of
individual and enterprise users. The aggregation layer of the network is to converge the
massive user traffic and connect the access layer and backbone or core layer of network. The
role of the backbone or core layer of the network is to provide the export of the network,
connect with all backbone networks, and connect with the Internet Data Center of the city or
country. Backbone networks are high-speed networks used to connect multiple regions’
networks such as metropolitan area networks or other backbone networks.
The OptiX RTN 905 2F/910A/950A device is mainly applicable to the access or aggregation
layer of the network.
1.4 TOE Overview
The TOE is Unified Transmission Software (UTS) only, which is a part of the OptiX RTN 905
2F/910A/950A software and for the System Control and Communication as shown in Figure
1-2. It provides the core control and management services of the device.
The non-TOE SW components include system and service attribute management, service
schedule and protect, optical Layer protocol, service warning and performance, service control
and monitor, and OS (Operation System).The non-TOE SW components are part of the RTN
900 Software package.
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Figure 1-2 TOE constitution
The UTS is responsible for managing and controlling the whole OptiX RTN 905
2F/910A/950A software, communication, and security features in OptiX RTN 905
2F/910A/950A.
To counter the security threats of OptiX RTN 905 2F/910A/950A, the TOE provides security
measures to mitigate security risks effectively. The main security features are:
1. Identification and authentication of administrative users
2. Authorization
3. Auditing
4. Communication Security
5. Management Traffic Flow Control
6. Security functionality management
The detailed description of above security features is in the chap.1.5.
1.5 TOE Description
1.5.1.1 Physical scope
The TOE is 'software only'. The TOE consists of and is limited to the unified transmission
software (UTS) of the OptiX RTN 905 2F/910A/950A, but not the hardware, which the UTS
is running on. The TOE together with the non-TOE firmware is packed into a software
package. The customer need to download the software package as well as the guidance
documents as pdf files from Huawei’s support website and the user has to verify the signature
values given in the Table 1-1 below for all TOE parts for secure acceptance.
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Table 1-1 Delivery Items
Type Delivery Item Version
Software
OptiX RTN 905 V100R019C10SPC200_SoftWare_Pkg.zip
(Optix RTN 905 2F)
V100R019C10
OptiX RTN 910A V100R019C10SPC200_SoftWare_Pkg.zip
(Optix RTN 910A)
OptiX RTN 950A V100R019C10SPC200_SoftWare_Pkg.zip
(Optix RTN 950A)
Product
Guidance
RTN 950A V100R019C10 Product Documentation 01, issue
01, 2020-04-30
V100R019C10
RTN 910A V100R019C10 Product Documentation 01, issue
01, 2020-04-30
V100R019C10
RTN 905 1E&2E&2F V100R019C10 Product Documentation
01, issue 01, 2020-04-30
V100R019C10
Huawei OptiX RTN 900 Series V100R019C10 Software -
AGD_OPE
v1.0
Huawei OptiX RTN 900 Series V100R019C10 Software -
AGD_PRE
v1.0
Huawei OptiX RTN 900 Series V100R019C10 Software -
ADV_C&R
v1.0
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1.5.1.2 Logical scope
 Identification and authentication
The TOE can authenticate administrative users by user name and password.
The TOE provides a local authentication mode, or can optionally enforce authentication
decisions obtained from a Radius server in the IT environment.
In local authentication mode, accounts and passwords are saved on the local equipment and
authenticated using the local account and password by the local equipment during login. In
RADIUS authentication mode, accounts and passwords are saved on the RADIUS server and
authenticated by the RADIUS server. During login, the accounts and passwords are forwarded
to the RADIUS server, using the RADIUS protocol and the RADIUS server checks the
validity of accounts and passwords.
User authentication is always enforced for EMS sessions via TLS sessions. The use of TLS
connection is always required for accessing the TOE via RMT. For LMT no logically secured
communication channel is required.
 Authorization
Authorization indicates that devices assign operation authorities to accounts according to their
validity.
The TOE controls access by the group-based authorization framework with predefined role
groups for management. Five hierarchical access groups are offered and can be assigned to
individual user accounts.
Only authenticated users can execute commands of the TOE. Only one user group level can
be assigned to a user account. So the user group level of a user is unambiguous at any time.
All authenticated users of the TOE are administrative users of some kind belonging to one of
the user groups defined below. There are no authenticated non-TOE administrative users.
Accounts are managed in groups and each group represents a specific authority assigned to
the accounts in the group. Table 1-2 lists the groups and their definition. For example, the
accounts of the "administrator" group are authorized to perform all security management and
advanced diagnosis operations. When an account is created, it is authorized to perform certain
operations and is not allowed to perform unauthorized operations. If an account attempts to
perform any unauthorized operation, an error message is displayed and the attempt is logged.
Both administrator and super administrator accounts belong to the administrator level and
both have the privilege to create other administrator or super administrator accounts. The
super administrator is a special administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging operations.
Table 1-2 Groups of accounts
Group Authority
Monitor This group has the lowest authority. The accounts of this group
are authorized to issue query commands and modify some of their
own attributes.
Operator The accounts of this group are authorized to query the system
information and perform some configuration operations.
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Group Authority
Maintenance The accounts of this group are authorized to perform all
maintenance operations, including the authority of Operator group
and general maintenance and diagnosis operations
Administrator The accounts of this group are used for security management and
are authorized to perform all query and configuration operations.
Especially, administrators can create super administrator account.
Super administrator The accounts in this group are authorized to perform all
operations of Administrator group and the advanced diagnosis
(debug) operation.
Note: user level in the following content is same as user group; in CC terminology, these are
considered roles.
 Auditing
Logs record routine maintenance events of the TOE. Administrators can find security
vulnerabilities and risks by checking logs. Considering security, the TOE provides security
logs and operation logs.
Security logs record operation events related to account management, such as modification of
passwords and addition of accounts.
Operation logs record events related to system configurations, such as modification of
equipment IP addresses and addition of services.
The TOE provides a Syslog solution to resolve the problem of limited equipment storage
space. Both security logs and operation logs can be saved on an external Syslog server.
 Communication Security
The TOE provides communication security by implementing the TLS protocol and the SFTP
protocol for different use cases.
For the secure communication between the TOE and the EMS the TLS protocol is used. TLS
version 1.2 are implemented. TLS certificates are required for establishing TLS encryption
channels. The TLS certificates are managed and issued by the user of the TOE (mainly
Internet Service Providers ('carriers')). SFTP (description as below) is used to load TLS
certificates onto TOE before establish TLS communications. The TOE acts as server during
the TLS communication established between the TOE and EMS, that is to say, the EMS will
validate the certificate from the TOE. The TOE does not provide path validation capabilities
for X.509 certificates.
The TOE provides an SFTP client for secure file downloading and uploading. Users can use
the SFTP client for fault collection, log uploading, and uploading and downloading of a file
and a database etc. In this application, the TOE serves as a client and the SFTP server is
deployed outside the equipment network and is provided by the carrier.
The SFTP authentication policy is determined by the SFTP server. The TOE supports
password authentication and key authentication. The password authentication indicates that an
SFTP client logs in to a server using an account name and a password. The key authentication
indicates that an SFTP server authenticates a client using the RSA key. For the key
authentication, users need to generate the RSA key on the TOE first and upload the public key
to the SFTP server. The length of the RSA key ranges from 2048 to 4096 bits and is specified
by users.
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The TOE uses passphrases to protect private keys on an SFTP client for cryptographic
authentication. When users generate key pairs, they are allowed to indicate the passphrases.
 Management Traffic Flow Control
For administration of the TOE, network packages have to be sent to the TOE from the
management network. The TOE provides Access Control List (ACL) for filtering incoming
information flows to management interfaces in Table 1-2. An administrator can set deny IP
addresses and ports, to limit data from specific IP addresses and to filter data from specific
communication ports. The ACL function protects equipment from network attacks by
controlling data of access requests from unauthorized IP addresses and ports. The
administrator can create, delete, and modify ACL rules in Table 1-3. Packet flows matching a
deny rule in the ACL are dropped. If no rule is specified for an incoming packet, it is accepted
by default.
Table 1-3 Classification ofACL
Item Feature
Basic ACL Rules are defined based on the source IP address.
Advanced
ACL
Rules are defined based on the source IP address of a data packet,
destination IP address of a data packet, protocol type of the IP bearer
network, and protocol features. The protocol features include source port
of the TCP protocol, destination port of the TCP protocol, and ICMP
protocol type.
Table 1-4 ACLparameters
Parameter Value Range Description
ACL rule ID 0–0xFFFFFFFF Indicates the ACL rule ID. The value
0xFFFFFFFF indicates that the ACL rule is
automatically allocated by the ACL protocol
or is manually assigned.
ACL
operation
type
Permit and deny Indicates the ACL operation type. The values
are as follows:
 Deny: If a received message matches a
deny rule in an ACL, the message is
discarded.
 Permit: If a received message matches a
permit rule in an ACL, the message is
forwarded.
Source IP
address
Source IP address The source IP address and the source
wildcard determine the addresses to which
an access control rule is applicable.
Source
wildcard
0–0xFFFFFFFF The value 0 represents a bit that must be
exactly matched and the value 1 represents a
bit that is ignored.
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Parameter Value Range Description
Sink IP
address
Sink IP address The destination IP address and the sink
wildcard determine the addresses to which
an access control rule is applicable.
Sink wildcard 0–0xFFFFFFFF The value 0 represents a bit that must be
exactly matched and the value 1 represents a
bit that is ignored.
Protocol type TCP, UDP, ICMP, and IP Set this parameter to UDP or TCP when
filtering packets at a UDP or a TCP port. Set
this parameter to ICMP when filtering
packets of the ICMP protocol and code type.
The value IP indicates that the protocol type
is not concerned.
Source port 0–65535 or 0xFFFFFFFF
(0xFFFFFFFF indicates
that this parameter is not
concerned)
This parameter is available only when
Protocol type is set to TCP or UDP.
Sink port 0–65535 or 0xFFFFFFFF
(0xFFFFFFFF indicates
that this parameter is not
concerned)
This parameter is available only when
Protocol type is set to TCP or UDP.
ICMP
protocol type
ICMP protocol type This parameter is available only when
Protocol type is set to ICMP. The value 255
indicates that this parameter is not
concerned.
ICMP code
type
ICMP code type This parameter is available only when
Protocol type is set to ICMP. The value 255
indicates that this parameter is not
concerned.
 Cryptographic functions
The TOE does not offer cryptographic services, but uses cryptographic mechanisms in the
implementation of its communication security functions (TLS, SFTP) and I&A functions
(certificates, SFTP public key authentication).
 Security functionality management
Security functionality management include not only authentication, access level, but also
managing security related data consisting of configuration profile and runtime parameters.
According to security functionality management, customized security is provided.
The functions mainly include:
 Management of user accounts and user attributes, including user credentials.
 Management of authentication failure policy
 Access control management, including the association of users and corresponding
privileged functionalities.
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 Enabling/disabling trusted channels for local and remote access to the TOE’s
management interfaces
 Management of ACLs and ACL attributes and parameters like IP addresses or address
ranges
 Configuration of network addresses for services used by the TOE, like NTP, Syslog,
RADIUS, SFTP
 Management of the TOE’s time
All security management functions (i.e. commands related to security management) require
sufficient user level for execution.
1.5.2 Non-TOE Hardware and Software
Based on physical scope and logical scope described so far, a list of configuration is to be
added:
 For management via the ETH interface, authentication is always enabled. Authentication
mode is username and password or Authentication, Authorization, Accounting (‘AAA’, i.e.
username and password). Length of password is no less than 8 characters.
 Service of FTP have to be disabled to use the TOE in the certified configuration.
The environment for TOE comprises the following components as shown in figure 1-3:
 Local PCs (WebLCT) used by administrators to connect to the TOE for access through
interfaces on SCC unit via a secure channel of TLS, or non-secure channel. Access will
be performed using a command line terminal.
 Remote PCs used by administrators to connect to the TOE for access through interfaces on
SCC unit within the TOE via a secure channel of TLS.
 EMS (Element Management System), it typically runs the U2000 rich user interface
management software.
 SFTP Server is a light-weight high performance SSH File Server and make configuration
simple.
 Radius server is optional and may be used instead of local authentication.
 Syslog server is optional and is used for receiving audit information from the TOE via
SYSLOG protocol.
 NTP server is used for synchronizing time to the TOE.
 Physical networks, such as Ethernet subnets, interconnecting various networking devices.
 OptiX RTN 900 Series (905 2F/910A/950A) hardware, firmware and non-TOE software,
include BIOS/OS/FPGA/CPLD of SCC board. The SCC board name of the 905 2F is
CSHP. The SCC board name of the 910A is CSHRF. The SCC board name of the 950A is
CSHOF.
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Figure 1-3 The TOE in its operational environment
Syslog server
EMS
(Element
Management System)
Radius
server
Transport Network
DCN
Network
SFTP
server
TOE
OptiX RTN 905 2F/
910A/950A WebLCT
NTP server
2 CC Conformance Claims
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2 CC Conformance Claims
2.1 CC Conformance Claim
This ST is CC Part 2 conformant [CC] and CC Part 3 conformant [CC]. The CC version of
[CC] is 3.1R5.
The ST claims conformance to the EAL3 augmented with ALC_FLR.2.
No conformance to a Protection Profile is claimed.
3 Security Problem Definition
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3 Security Problem Definition
3.1 Asset
The assets to be protected are the information stored, processed or generated by the TOE.
Including below:
Step 1 Audit data: The data which is provided by the TOE during security audit logging
Step 2 Authentication data: The data which is used by the TOE to identify and authenticate the
external entities which interact with the TOE.
Step 3 Crypto data: All data used by the TOE for cryptographic operations like digital signature
handling and encryption or decryption purposes. This includes symmetric and
asymmetric cryptographic keys.
Step 4 Configuration data: The data for the TOE, which is used for configuration of security
feature and functions. This includes also data which is used by the TOE for system
software, patches update, and identity checking purposes.
Step 5 Management Traffic data, which is the management information exchanged between the
TOE and the EMS from authorized users.
3.2 Threats
This section specifies the threats that are addressed by the TOE and the TOE environment.
As a result, the following threats have been identified:
3.2.1 Threats
T.UnwantedManagementTraffic The traffic here only refers to the traffic on management
interfaces, that means, the Unwanted Network Traffic threat only exists on the management
plane. The Unwanted network traffic may originate from an attacker and result in an overload
of the management interfaces, which may cause a failure of the TOE to respond to system
control and normal management operations. As a consequence, the TOE might be unable to
provide some of the TSF while under attack and in particular security management
functionality to update configuration data for the TOE. Subsequently, backup of audit
information before local storage space is exceeded and old audit information is overwritten by
new audit events could be affected. Therefore, Audit data and Configuration data for the TOE
are assets that could be affected by this threat, too.
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T.UnauthenticatedAccess An unauthenticated person may attempt to bypass the security of
the TOE so as to access the TOE. This could affect all assets as defined in chap. 3.1 .
T.UnauthorizedAccess A user with restricted action and information access authorization
gains access to unauthorized commands or information. This threat also includes data leakage
to non-intended person or device. This could affect all assets as defined in chap. 3.1 .
T.Intercept A remote attacker is able to intercept, modify and re-use management
information assets that are exchanged between the TOE and EMS or WebLCT. This comprises
Authentication data (in particular authentication data of administrative users), Crypto data
(regarding this threat mainly data related to session keys used for secure communication), and
Configuration Data for the TOE. In addition, an attacker is able to intercept and modify audit
data that is exchanged between the TOE and a trusted IT product. All these assets could be
affected by this threat.
3.2.2 Threats Components
 T.UnwantedManagementTraffic
Threat agent: Attacker.
Asset: Audit data, Configuration data.
Adverse action: Disturbance on TOE operation.
 T.UnauthenticatedAccess
Threat agent: Unauthenticated person.
Asset: Authentication data, Audit data, Configuration data, Crypto data, Management Traffic
data.
Adverse action: Access to the TOE.
 T.UnauthorizedAccess
Threat agent: User with restricted action and information access authorization.
Asset: Authentication data, Audit data, Configuration data, Crypto data, Management Traffic
data.
Adverse action: perform unauthorized actions and unauthorized access to TOE information
and configuration data.
 T.Intercept
Threat agent: Remote attacker in the management network.
Asset: Authentication data, Crypto data, Configuration data.
Adverse action: Intercept, and potentially modify or re-use information that are exchanged
between TOE and EMS or WebLCT.
3.3 Organizational Security Policies
This section specifies one organizational security policy (OSP) to be met by the TOE and the
TOE environment.
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OSP.Accountability The users of the TOE shall be held accountable for their
security-relevant actions within the TOE.
3.4 Assumptions
This section specifies the assumptions on the TOE environment that are necessary for the
TOE to meet its security objectives.
A.Certificates It is assumed that digital certificates that are generated externally by trusted
certification authorities are of good quality i.e. meeting corresponding standards and
providing sufficient security strength through the use of appropriate cryptographic
mechanisms and cryptographic parameters. This applies for the cryptographic mechanisms
and parameters contained in the certificate and as well for the mechanisms and parameters
used to sign the certificate. It is assumed that administrators examine the quality of the
certificates besides verifying the integrity and authenticity before importing them. Especially
certificates signed with weak hashing algorithms are assumed to be not imported into the
TOE.
A.PhysicalProtection It is assumed that the TOE and its operational environment (i.e. the
complete system including attached peripherals) are protected against unauthorized physical
access. It is assumed that only administrators (i.e. all users who could successfully
authenticate to the TOE) are authorized to physically access the TOE and its operational
environment. This assumption includes that the local management network, including the
RADIUS server, syslog server, NTP server, SFTP servers and locally attached management
terminals (LMT) together with all related communication lines are operated in the same
physically secured environment as the TOE. Remote management terminals (RMTs) need to
be physically protected on the same level as the TOE but they do not necessarily have to be
kept in the same physical environment. The communication lines between any RMT and the
TOE are protected by cryptographic means and do not need any physical protection. It is
assumed that all RMTs as well as peripherals like RADIUS server, NTP server, SFTP servers
or syslog server are connected to the TOE via the same segregated management network (see
also A.NetworkSegregation). As a result, it can be assumed that the TOE and its operational
environment are physically protected and are not subject to physical attacks.
A.NetworkElements It is assumed that the operational environment provides securely and
correctly working network devices as resources that the TOE needs to cooperate with.
Behaviors of such network devices provided by operational environment shall be also secure
and correct. These network devices are deployed in an independent network which is
segregated from other network by VPN or firewall or other methods. Examples of such
devices are:
 Peer router(s) for the exchange of dynamic routing information;
 Local and remote management terminals (WebLCT, EMS) used for administration of
the TOE.
 RADIUS servers for obtaining authentication and authorization decisions.
 SYSLOG servers for receiving and storing audit data.
 NTP servers.
A.NetworkSegregation It is assumed that the operational environment provides segregation
of networks by deploying the management interface in TOE into an independent local
network.
A.NoEvil It is assumed that personnel working as authorized administrators (i.e. all users that
can successfully authenticate to the TOE) shall be carefully selected for trustworthiness and
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trained for proper operation of the TOE. These administrative users will be competent, and
not careless or willfully negligent or hostile, and will follow and abide by the instructions
provided by the TOE documentation.
A.Device It is assumed that the underlying hardware of OptiX RTN 905 2F/910A/950A,
which is outside the scope of the TOE, as well as the firmware and the underlying OS and
non-TOE software, are trusted and works correctly.
A.UpToDateClient It is assumed that the user uses a secure remote management terminal for
remote administration of the TOE which is up to date with respect to supported cryptographic
algorithms and security measures.
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4 Security Objectives
4.1 Security Objectives for the TOE
The following objectives must be met by the TOE:
 O.DataFilter The TOE shall ensure that only allowed management traffic goes through
the TOE.
 O.Authorization The TOE shall implement different authorization roles that can be
assigned to users in order to restrict the functionality that is available to them.
 O.Authentication The TOE shall authenticate users before access to data and security
functions is granted.
 O.Audit The TOE shall to provide functionality generate audit records for
security-relevant administrator actions.
 O.Communication The TOE must implement logical protection measures for network
communication between the TOE and RMT as well as the TOE and trusted IT products
from the operational environment.
 O.SecurityManagement The TOE shall provide functionality to manage security
functions provided by the TOE.
4.2 Security Objectives for the Operational Environment
 OE.Certificates Digital certificates that are generated externally by trusted certification
authorities shall be of good quality i.e. meeting corresponding standards and providing
sufficient security strength through the use of appropriate cryptographic mechanisms and
cryptographic parameters. This applies for the cryptographic mechanisms and parameters
contained in the certificate and as well for the mechanisms and parameters used to sign
the certificate. Administrators shall examine the quality of the certificates besides
verifying the integrity and authenticity before importing them. Especially certificates
signed with weak hashing algorithms shall not be imported into the TOE.
 OE.PhysicalProtection The TOE and its operational environment (i.e. the complete
system including attached peripherals) shall be protected against unauthorized physical
access. Only administrators (i.e. all users who could successfully authenticate to the TOE)
shall be authorized to physically access the TOE and its operational environment. The
local management network, including the RADIUS server, syslog server, NTP server,
SFTP server and locally attached management terminals (LMT) together with all related
communication lines shall be operated in the same physically secured environment as the
TOE. Remote management terminals (RMTs) shall be physically protected on the same
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level as the TOE but they do not necessarily have to be kept in the same physical
environment. The communication lines between any RMT and the TOE are protected by
cryptographic means and do not need any physically protection. All RMTs as well as
peripherals like RADIUS server, NTP server, SFTP server or syslog server shall be
connected to the TOE via the same segregated management network (see also
OE.NetworkSegregation). As a result, the TOE and its operational environment shall be
physically protected and shall not be subject to physical attacks.
 OE.NetworkElements The operational environment shall provide securely and correctly
working network devices as resources that the TOE needs to cooperate with. The
behavior of such network devices provided by the operational environment shall be
secure and correct. This applies e.g. to LMTs and EMS used for TOE management,
Syslog servers, SFTP servers, NTP servers and Radius servers for obtaining
authentication and authorization decisions.
 OE.NetworkSegregation The operational environment shall provide segregation of
networks by deploying the management interface in TOE into an independent local
network.
 OE.NoEvil Personnel working as authorized administrators (i.e. all users that can
successfully authenticate to the TOE) shall be carefully selected for trustworthiness and
trained for proper operation of the TOE. These administrative users shall be competent,
and not careless or willfully negligent or hostile, and shall follow and abide by the
instructions provided by the TOE documentation. All user management and permission
management are implemented in the TOE.
 OE.Device The underlying hardware of OptiX RTN 905 2F/910A/950A, which is
outside the scope of the TOE, as well as the firmware and non-TOE software, shall work
correctly.
 OE.UpToDateClient The user shall use a secure remote management terminal for
remote administration of the TOE which is up to date with respect to supported
cryptographic algorithms and security measures.
4.3 Rationale for Security Objectives
The following table provides a mapping of TOE objectives to threats, showing that each
objective is at least covered by one threat in Table 4-1.
Table 4-1 Mapping objectives to threats
and OSPs
Threat / OSP Security Objectives Rationale for Security Objectives
T.UnwantedManage
mentTraffic
O.DataFilter
O.SecurityManagement
OE.NetworkSegregation
This threat is countered by O.DataFilter
ensuring that unwanted traffic is filtered
and cannot deplete the network
resources.
The filter rules can be configured by
authorized users with sufficient user
level (O.SecurityManagement).
An independent local network is used to
manage the TOE.
(OE.NetworkSegregation)
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Threat / OSP Security Objectives Rationale for Security Objectives
T.UnauthenticatedA
ccess
O.Authentication
O.Audit
O.SecurityManagement
The threat of unauthenticated access to
the TOE is countered by requiring the
TOE to implement an authentication
mechanism for its users
(O.Authentication).
Authentication mechanisms can be
configured by users with sufficient user
level (O.SecurityManagement). In
addition, login attempts are logged
allowing detection of attempts and
possibly tracing of culprits (O.Audit).
T.UnauthorizedAcce
ss
O.Authorization
O.Audit
O.SecurityManagement
The threat of unauthorized access is
countered by requiring the TOE to
implement an access control mechanism
(O.Authorization).
Access control mechanisms (including
user levels) can be configured by users
with sufficient user level
(O.SecurityManagement).
In addition, actions are logged allowing
detection of attempts and possibly
tracing of culprits (O.Audit).
T.Intercept O.Communication
O.SecurityManagement
The threat of eavesdropping is countered
by requiring communications security
via TLS for communication between
EMS and the TOE and SFTP for
communication between the TOE and
the SFTP server (O.Communication).
Management of secure communication
channels can be performed by users with
sufficient user level
(O.SecurityManagement).
OSP.Accountability O.Authentication
O.Audit
Accountability for security-relevant
actions is achieved by generating audit
records for those events (O.Audit).
Attributing security-relevant events to
their originators requires users to be
properly identified and authenticated
(O.Authentication)
The following table provides a mapping of the objectives for the operational environment to
assumptions, showing that each objective is covered exactly by one assumption. The
objectives for the environment are mirrored by the assumptions. Therefore, the mapping is
trivial in Table 4-2.
A. Certificates is upheld by OE.Certificates, which is a rephrasing of the assumption.
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A. PhysicalProtection is upheld by OE.PhysicalProtection, which is a rephrasing of the
assumption.
A.NetworkElements is upheld by OE.NetworkElements, which is a rephrasing of the
assumption.
A.NetworkSegregation is upheld by OE.NetworkSegregation, which is a rephrasing of the
assumption.
A.NoEvil is upheld by OE.NoEvil, which is a rephrasing of the assumption.
A.Device is upheld by OE.Device, which is a rephrasing of the assumption.
A.UpToDateClient is upheld by OE.UpToDateClient, which is a rephrasing of the assumption.
Table 4-2 Mapping objectives for the
environment to assumptions
Environmental Objective Threat /Assumption
OE.Certificates A.Certificates
OE.PhysicalProtection A.PhysicalProtection
OE.NetworkElements A.NetworkElements
OE.NetworkSegregation A.NetworkSegregation
T.UnwantedManagementTraffic
OE.NoEvil A.NoEvil
OE.Device A.Device
5 Security Requirements for the TOE
5.1 Conventions
The following conventions are used for the completion of operations:
 Strikethrough indicates text removed as a refinement
 (underlined text in parentheses) indicates additional text provided as a refinement.
5 Security Requirements for the TOE
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 Bold text indicates the completion of an assignment.
 Italicised and bold text indicates the completion of a selection.
 Iteration/Identifier indicates an element of the iteration, where Identifier distinguishes the different
iterations.
5.2 Security Functional Requirements
5.2.1 Security Audit (FAU)
5.2.1.1 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) The following auditable events recorded to operation logs:
i. user activity
1. login, logout
2. system and service configuration operation requests (i.e. configuration of the
device after start-up)
3. system security configuration.
The following auditable events recorded to security logs:
ii. user management
1. add, delete, modify users
2. user password change
3. user group level change
4. user lock and unlock
Application Note: Changes to user levels are covered by c.ii.3. user group level change.
Command levels are fixed and cannot be modified. Audit functionality shall be enabled by
default during start-up of the device. The audit functionality cannot be shut down manually.
The audit functionality can only be shut down by shutdown of the OptiX RTN 905
2F/910A/950A itself. In that case there is only an audit record generated for the shutdown of
the device but not the audit functionality in particular.
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 (if applicable), 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 ST, Operation Type (if applicable), Operation Object (if
applicable), Access IP Address (if applicable), User Name (if applicable).
Application Note: The term ‘if applicable’ shall be read as ‘whenever an event can be
associated with the specified information’. For example, if an event can be associated with a
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User ID, then the event shall be audited and the audit information shall contain the User ID. If
the event cannot be associated with the User ID, the event shall be audited and the audit
information shall not contain User ID information. If multiple conditional information can be
associated with an event (e.g. interface and User ID can be associated with an event), all the
conditional information shall be contained in the audit information when auditing the event.
5.2.1.2 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 causes the event.
5.2.1.3 FAU_SAR.1 Audit Review
FAU_SAR.1.1 The TSF shall provide Administrators and Super administrators with
the capability to read all information from the audit records.
FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for the user
to interpret the information.
5.2.1.4 FAU_SAR.2 Restricted Audit Review
FAU_SAR.2.1 The TSF shall prohibit all users read access to the audit records, except
those users that have been granted explicit read-access.
5.2.1.5 FAU_STG.1 Protected Audit Trail Storage
FAU_STG.1.1 The TSF shall protect the stored audit records in the audit trail from
unauthorized deletion.
FAU_STG.1.2 The TSF shall be able to prevent unauthorized modifications to the stored
audit records in the audit trail.
5.2.1.6 FAU_STG.3 Action in Case of Possible Audit Data Loss
FAU_STG.3.1 The TSF shall overwrite the oldest records if the audit trail exceeds the
size of the storage device.
Application Note: The audit trail is recorded in log file on the storage media (FLASH), the
size of log file is fixed.
5.2.2 User Data Protection (FDP)
5.2.2.7 FDP_ACC.1 Subset Access Control
FDP_ACC.1.1 The TSF shall enforce the user group SFP on
Subject: user session;
Objects: commands provided by TOE;
Operation: Execute
5.2.2.8 FDP_ACF.1 Security Attribute based Access Control
FDP_ACF.1.1 The TSF shall enforce the user group SFP to objects based on the
following:
Subject security attributes
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users and their following security attributes:
 user Identity
 user level
Objects security attributes:
commands and their following security attributes:
 Command level (There are five command levels: Monitor, Operate, Maintain,
Manage, Debug)
FDP_ACF.1.2 The TSF shall enforce the following rules to determine if an operation
among controlled subjects and controlled objects is allowed:
Step 1 Only authorized users are permitted access to commands.
Step 2 Users can be configured with different user group to control the device access
permission.
Step 3 There are five user groups: Monitor, Operator, Maintainer, Administrator, Super
administrator, in ascending order of privilege level.
Step 4 Each user group corresponds to different command levels. A user can run all
commands from the command level corresponding to his user level below.
User group Command Level
Monitor Monitor
Operate Monitor
Operate
Maintenance Monitor
Operate
Maintenance
Administrator Monitor
Operate
Maintenance
Manage
Super Administrator Monitor
Operate
Maintenance
Manage
Debug
Step 5 The command level is stored by the TOE (i.e. UTS software) and cannot be
changed.
FDP_ACF.1.3 The TSF shall explicitly authorise access of subjects to objects based on
the following additional rules: none.
FDP_ACF.1.4 The TSF shall explicitly deny access of subjects to objects based on the
following additional rules: none.
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5.2.2.9 FDP_IFC.1 Subset Information Flow Control
FDP_IFC.1.1 The TSF shall enforce the Management Network Traffic Flow Filtering
SFP on
Subjects:
Device management interface
Information:
IP packets
Operations:
Device management interface will accept or deny IP packets based on the settings of
the device management interface and the IP packets content (i.e. subject attributes and
information security attributes as defined in chap. 5.2.2.10 ).
5.2.2.10 FDP_IFF.1 Simple Security Attributes
FDP_IFF.1.1 The TSF shall enforce the Management Network Traffic Flow Filtering
SFP based on the following types of subject and information security attributes
Subject attributes: IP address (i.e. IP address setting of the device management
interface), Port number
Information security attributes: Source IP address, Destination IP address, IP Protocol
number, Source port number, Destination port number
FDP_IFF.1.2 The TSF shall permit an information flow between a controlled subject
and controlled information via a controlled operation if the following rules hold:
Step 1 The TOE uses the Access Control List(ACL) to match the IP packets received from
the device management interface. If the IP packet match an ACL rule, the TOE
discards or accepts the packets based on the action specified in the ACL rule.
Step 2 An ACL rule contains one or more of the following attributes: source IP address,
destination IP address, IP protocol number, source port number, and destination
port number.
FDP_IFF.1.3 The TSF shall enforce the no additional information flow control SFP
rules.
FDP_IFF.1.4 The TSF shall explicitly authorize an information flow based on the
following rules: none.
FDP_IFF.1.5 The TSF shall explicitly deny an information flow based on the following
rules: none.
5.2.3 Identification and Authentication (FIA)
5.2.3.11 FIA_AFL.1 Authentication Failure Handling
FIA_AFL.1.1 The TSF shall detect when an administrator configurable positive
integer within 1 to 10 unsuccessful authentication attempts within certain period of time
occur related to user logging in.
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Application Note: The maximum unsuccessful authentication attempts is 5 by default, the
administrator can set it to a value ranging from 1 to 10.
FIA_AFL.1.2 When the defined number of unsuccessful authentication attempts has
been met, the TSF shall
1. lock the offending user ID;
2. audit the event in the security log.
Application Note: The default value for the maximum number of consecutive failed logins is
five, and the interval between two attempts is shorter than three minutes.
5.2.3.12 FIA_ATD.1 User Attribute Definition
FIA_ATD.1.1 The TSF shall maintain the following list of security attributes belonging
to individual users:
1. user ID
2. user validity period
3. user level
4. password
5. password validity period
6. the inactivity time after which an account is automatically logged out.
7. Status of the account (locked/unlocked)
8. number of failed consecutive logins within certain period of time and timestamp of
last successful login
5.2.3.13 FIA_UAU.2 User authentication before any action
FIA_UAU.2.1 The TSF shall require each user to be successfully authenticated before
allowing any other TSF-mediated actions on behalf of that user.
Application Note: Authentication is possible by username and password.
5.2.3.14 FIA_UAU.5 Multiple Authentication Mechanisms
FIA_UAU.5.1 The TSF shall provide the following authentication mechanisms:
1. Remote authentication by RADIUS for authentication via EMS;
2. Local Authentication by local database of the TOE for authentication via LMT and
EMS
to support user authentication.
FIA_UAU.5.2 The TSF shall authenticate any user's claimed identity according to the
following:
1. For Remote authentication by RADIUS;
2. For local Authentication, the TSF will authenticate the users based on the configured
Identification (including user id and password).
Application Note: The TOE can use only one of the mechanisms at any given time. The
Administrator can configure which mechanism is used by the TOE.
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5.2.3.15 FIA_UID.2 User identification before any action
FIA_UID.2.1The TSF shall require each user to be successfully identified before allowing any
other TSF-mediated actions on behalf of that user.
Application Note: Authentication is possible by username and password. The user is
identified by his username if he is able to successfully authenticate with his username and
corresponding password.
5.2.4 Security Management (FMT)
5.2.4.16 FMT_MOF.1 Management of Security Functions Behavior
FMT_MOF.1.1 The TSF shall restrict the ability to determine the behavior of the
functions defined in FMT_SMF.1 to users with administrator or super administrator user
level as defined in FMT_SMR.1.
5.2.4.17 FMT_MSA.1/ACFATD Management of Security Attributes (user
group SFP)
FMT_MSA.1.1/ACFATD The TSF shall enforce the user group SFP to restrict the ability to
query, modify the security attributes NTP server address, SYSLOG server address,
RADIUS server address, SFTP server address, and Attributes identified in FDP_ACF.1
and FIA_ATD.1 to the users with administrator or super administrator user level as
defined in FMT_SMR.1.
5.2.4.18 FMT_MSA.1/IFF Management of Security Attributes
FMT_MSA.1.1/IFF The TSF shall enforce the Management Network Filtering SFP to
restrict the ability to delete, modify the security attributes identified in FDP_IFF.1 to the
users with administrator or super administrator user level as defined in FMT_SMR.1.
5.2.4.19 FMT_MSA.3/ACFATD Static Attribute Initialization
FMT_MSA.3.1/ACFATD The TSF shall enforce the user group SFP to provide permissive
default values for security attributes that are used to enforce the SFP.
FMT_MSA.3.2/ACFATD The TSF shall allow users with administrator or super
administrator user level as defined in FMT_SMR.1 to specify alternative initial values to
override the default values when an object or information is created.
5.2.4.20 FMT_MSA.3/IFF Static Attribute Initializatio
FMT_MSA.3.1/IFF The TSF shall enforce the Management Network Filtering SFP (based
on ACL) to provide permissive default values for security attributes that are used to enforce
the SFP.
FMT_MSA.3.2/IFF The TSF shall allow users with administrator or super administrator
user level as defined in FMT_SMR.1 to specify alternative initial values to override the
default values when an object or information is created.
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5.2.4.21 FMT_SMF.1 Specification of Management Functions
FMT_SMF.1.1 The TSF shall be capable of performing the following management
functions (using administrator and super administrator accounts):
Step 1 Management of user accounts and user attributes, including user credentials
Step 2 Management of authentication failure policy
Step 3 Management of ACLs and ACL parameters like IP addresses or address ranges
Step 4 Configuration of network addresses for services used by the TOE, like NTP, Syslog,
RADIUS, SFTP
Step 5 Enabling/disabling trusted channels for local and remote access to the TOE’s
management interfaces
Step 6 Management of the TOE’s time
5.2.4.22 FMT_SMR.1 Security Roles
FMT_SMR.1.1 The TSF shall maintain the roles
1. Monitor (as defined in the table below)
2. Operator (as defined in the table below)
3. Maintenance (as defined in the table below)
4. Administrator (as defined in the table below)
5. Super administrator (as defined in the table below)
Role Authority
Monitor This group has the lowest authority. The accounts of
this group are authorized to issue query commands and
modify their own attributes.
Operator The accounts of this group are authorized to query the
system information and perform non-SFRs
configuration operations.
Maintenance The accounts of this group are authorized to perform all
maintenance operations, including the authority of
Operator group and general maintenance and diagnosis
operations
Administrator The accounts of this group are used for security
management and are authorized to perform all query
and configuration operations. Especially, administrators
can create super administrator account.
Super administrator The accounts in this group are authorized to perform all
operations of Administrator group and the advanced
diagnosis (debug) operation.
Application Note: The roles are hierarchical, i.e. each role includes all authorities of the
previous roles in addition to the authorities described for the role itself.
FMT_SMR.1.2 The TSF shall be able to associate users with roles.
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5.2.5 TOE access (FTA)
5.2.5.23 FTA_SSL.3 TSF-initiated Termination
FTA_SSL.3.1 The TSF shall terminate an interactive session after a time interval of
user inactivity which can be configured.
5.2.5.24 FTA_TSE.1 TOE Session Establishment
FTA_TSE.1.1 The TSF shall be able to deny session establishment based on
1. authentication failure
2. Source IP address
5.2.6 Trusted Path/Channels (FTP)
5.2.6.25 FTP_ITC.1/TLS Inter-TSF trusted channel
FTP_ITC.1.1/TLS The TSF shall provide a communication channel between itself and
another trusted IT product that is logically distinct from other communication channels and
provides assured identification of its end points and protection of the channel data from
modification or disclosure.
Application Note: To establish a trusted channel, the TLS protocol shall be used. TLS
complies with RFC 5246 (TLS1.2).
Client authentication is performed key-based on the application layer.
FTP_ITC.1.2/TLS The TSF shall permit another trusted IT product to initiate
communication via the trusted channel.
Application Note: The EMS will act as TLS client to initiate communication to the TOE
which acts as TLS server.
FTP_ITC.1.3/TLS The TSF shall initiate communication via the trusted channel for
protecting management communication.
Application Note: The TSF do not initiate any TLS-based communication, but offers the
ability for protected communication for users sessions.
5.2.6.26 FTP_ITC.1/SFTP Inter-TSF trusted channel
FTP_ITC.1.1/SFTP The TSF shall provide a communication channel between itself and
another trusted IT product that is logically distinct from other communication channels and
provides assured identification of its end points and protection of the channel data from
modification or disclosure.
FTP_ITC.1.2/SFTP The TSF shall permit the TSF to initiate communication via the
trusted channel.
FTP_ITC.1.3/SFTP The TSF shall initiate communication via the trusted channel for file
transfer via SFTP.
Application Note: To establish a trusted channel, the SSH(SFTP) protocol shall be used. SFTP
complies with [RFC 4251], [RFC 4252], [RFC 4253], and [RFC 4254].
5 Security Requirements for the TOE
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For SSH/SFTP-based communications the following algorithms and ciphers are supported:
 Authentication can be performed either public key-based or password-based as
described in [RFC 4252].
 Key exchange is performed using diffie-hellman-group14-sha1
 The public key algorithm of the SSH transport implementation is ssh-rsa.
 For data encryption AES128-CTR, AES192-CTR and AES256-CTR are supported.
 For data integrity protection HMAC-SHA1 is supported.
5.3 Security Functional Requirements Rationale
5.3.1 Coverage
As shown Table 5-1 provides a mapping of SFR to the security objectives, showing that each
security functional requirement addresses at least one security objective.
Table 5-1 Mapping SFRs to objectives
Security Functional Requirements Objectives
FAU_GEN.1 O.Audit
FAU_GEN.2 O.Audit
FAU_SAR.1 O.Audit
FAU_SAR.2 O.Audit
FAU_STG.1 O.Audit
FAU_STG.3 O.Audit
FDP_ACC.1 O.Authorization
FDP_ACF.1 O.Authorization
FDP_IFC.1 O.DataFilter
FDP_IFF.1 O.DataFilter
FIA_AFL.1 O.Authentication
FIA_ATD.1 O.Authentication
O.Authorization
FIA_UAU.2 O.Authentication
FIA_UAU.5 O.Authentication
FIA_UID.2 O.Authentication
O.Authorization
FMT_MOF.1 O.Authorization
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O.SecurityManagement
FMT_MSA.1/ACFATD O.Authorization
O.SecurityManagement
FMT_MSA.1/IFF O.Authorization
O.DataFilter
O.SecurityManagement
FMT_MSA.3/ACFATD O.Authorization
O.SecurityManagement
FMT_MSA.3/IFF O.Authorization
O.DataFilter
O.SecurityManagement
FMT_SMF.1 O.Authorization
O.SecurityManagement
O.DataFilter
FMT_SMR.1 O.Authorization
O.SecurityManagement
FTA_SSL.3 O.Authentication
O.Communication
FTA_TSE.1 O.DataFilter
O.Authentication
O.Communication
FTP_ITC.1/TLS O.Authentication
O.Communication
FTP_ITC.1/SFTP O.Authentication
O.Communication
5.3.2 Sufficiency
As shown Table 5-2 provides justification for each security objective for the TOE, showing
that the security functional requirements are suitable to meet and achieve the security
objectives:
Table 5-2 SFR sufficiency analysis
Security objective Rationale
5 Security Requirements for the TOE
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O.DataFilter The requirement of ACL is defined in FDP_IFF.1 and
FDP_IFC.1 and the impact on session establishment is covered
in FTA_TSE.1. The requirements on management functionality
for the definition of ACL are provided in FMT_MSA.1/IFF,
FMT_MSA.3/IFF and FMT_SMF.1.
Rejection of connections is addressed by FTA_TSE.1.
O.Audit The generation of audit records is implemented by
FAU_GEN.1. Audit records are supposed to include timestamp
as provided by the external NTP server and user identities as
defined in FAU_GEN.2 where applicable.
Requirements on reading audit records are defined in
FAU_SAR.1 and FAU_SAR.2. The protection of the stored
audit records against unauthorized modification is implemented
in FAU_STG.1. If the audit trail exceeds the size of the storage
device The TSF shall roll back the oldest records as required by
FAU_STG.3.
O.Communication Communication security is implemented by the establishment of
a trusted channel for remote users in FTP_ITC.1/TLS and
FTP_ITC.1/SFTP. Termination of inactive sessions is covered
by FTA_SSL.3. FTA_TSE.1 addresses that session
establishment is denied if an ACL exists that specifies a deny
rule for the attempted connection.
O.Authentication User authentication is implemented by FIA_UAU.2, supported
by individual user identification in FIA_UID.2. Remote user
authentication by RADIUS as well as authentication via local
database is implemented by FIA_UAU.5. The requirements on
necessary user attributes (passwords) are addressed in
FIA_ATD.1. The authentication mechanism supports
authentication failure handling as addressed in FIA_AFL.1.
User authentication via RMTs requires the use of a trusted
channel according to FTP_ITC.1/TLS and FTP_ITC.1/SFTP.
Termination of a communication channel due to user inactivity
is covered by FTA_SSL.3. Rejection of connections is
addressed by FTA_TSE.1.
O.Authorization User identification is addressed in FIA_UID.2. The requirement
for access control is spelled out in FDP_ACC.1, and the access
control policies are modeled in FDP_ACF.1. User-related
attributes are spelled out in FIA_ATD.1.
Security Management is based on the definition of roles as
subject and functions as object as defined in FMT_SMR.1,
FMT_SMF.1 and FMT_MOF.1. Requirements on the
management functionality for the definition of access control
policies and other security functions behavior, security
attributes, and static attribute initialization are provided in
FMT_MSA.1/ACFATD, FMT_MSA.1/IFF, FMT_MSA.3/
ACFATD, and FMT_MSA.3/IFF.
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O.Security
Management
The requirements on management of security functions
behavior, security attributes, and static attribute initialization are
provided in FMT_MOF.1, FMT_MSA.1/ACFATD,
FMT_MSA.1/IFF, FMT_MSA.3/ACFATD, FMT_MSA.3/IFF,
and FMT_SMF.1.
The management functionality for the security functions of the
TOE is defined in FMT_SMF.1 and the security user roles are
defined in FMT_SMR.1.
5.3.3 Security Requirements Dependency Rationale
Dependencies within the EAL3 package selected for the security assurance requirements have
been considered by the authors of CC Part 3 and are not analyzed here again. The
augmentation by ALC_FLR.2 does not cause any additional dependencies.
The security functional requirements in this Security Target do not introduce dependencies on
any security assurance requirement; neither do the security assurance requirements in this
Security Target introduce dependencies on any security functional requirement.
The following Table 5-3 demonstrates the dependencies of SFRs modeled in CC Part 2 and
how the SFRs for the TOE resolve those dependencies.
Table 5-3 Dependencies between TOE security functional requirements
Security Functional
Requirement
Dependency Resolution
FAU_GEN.1 FPT_STM.1 The TOE relies on the external
NTP server to provide the
timestamp.
FAU_GEN.2 FAU_GEN.1
FIA_UID.1
FAU_GEN.1
FIA_UID.2
FAU_SAR.1 FAU_GEN.1 FAU_GEN.1
FAU_SAR.2 FAU_SAR.1 FAU_SAR.1
FAU_STG.1 FAU_GEN.1 FAU_GEN.1
FAU_STG.3 FAU_STG.1 FAU_STG.1
FDP_ACC.1 FDP_ACF.1 FDP_ACF.1
FDP_ACF.1 FDP_ACC.1
FMT_MSA.3/ACFATD
FDP_ACC.1
FMT_MSA.3/ACFATD
FDP_IFC.1 FDP_IFF.1 FDP_IFF.1
FDP_IFF.1 FDP_IFC.1
FMT_MSA.3/IFF
FDP_IFC.1
FMT_MSA.3/IFF
FIA_AFL.1 FIA_UAU.1 FIA_UAU.2
FIA_ATD.1 No Dependencies None
FIA_UAU.2 FIA_UID.1 FIA_UID.2
5 Security Requirements for the TOE
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Security Functional
Requirement
Dependency Resolution
FIA_UAU.5 No Dependencies None
FIA_UID.2 No Dependencies None
FMT_MOF.1 FMT_SMF.1
FMT_SMR.1
FMT_SMF.1
FMT_SMR.1
FMT_MSA.1/ACFATD [FDP_ACC.1 or
FDP_IFC.1]
FMT_SMR.1
FMT_SMF.1
FDP_ACC.1
FMT_SMR.1
FMT_SMF.1
FMT_MSA.1/IFF [FDP_ACC.1 or
FDP_IFC.1]
FMT_SMR.1
FMT_SMF.1
FDP_IFC.1
FMT_SMR.1
FMT_SMF.1
FMT_MSA.3/ACFATD FMT_MSA.1
FMT_SMR.1
FMT_MSA.1/ACFATD
FMT_SMR.1
FMT_MSA.3/IFF FMT_MSA.1
FMT_SMR.1
FMT_MSA.1/IFF
FMT_SMR.1
FMT_SMF.1 No Dependencies None
FMT_SMR.1 FIA_UID.1 FIA_UID.2
FTA_SSL.3 No Dependencies None
FTA_TSE.1 No Dependencies None
FTP_ITC.1/TLS No Dependencies None
FTP_ITC.1/SFTP No Dependencies None
5.4 Security Assurance Requirements
The security assurance requirements for the TOE are the EAL3 augmented with ALC_FLR.2,
as specified in [CC] Part 3. No operations are applied to the assurance components.
5.5 Security Assurance Requirements Rationale
The EAL3 augmented with ALC_FLR.2 has been chosen commensurate with the threat
environment that is experienced by typical consumers of the TOE.
5 Security Requirements for the TOE
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Dependencies within the EAL package selected (EAL3) for the security assurance require-
ments have been considered by the authors of CC Part 3 and are therefore not analyzed here.
The augmentation by ALC_FLR.2 does not cause any additional dependencies.
6 TOE Summary Specification
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6 TOE Summary Specification
This chapter identifies and describes how the Security Functional Requirements identified
above are met by the TOE.
6.1 Authentication
The TOE can identify users based on unique IDs and enforce their authentication before
granting them access to any TSF management interfaces. Detailed functions include:
 Support authentication via local passwords. This function is achieved by comparing user
information input with pre-defined user information stored in the flash. Passwords have a
length of 16 characters. The TOE enforces a password complexity policy of at least
contains three types of the following character types: capital letter, small letter, number,
and special character.
 Support authentication via the remote RADIUS authentication server. The TOE hands
identification and authentication information provided by the user during login to the
RADIUS server and enforces the RADIUS server’s pass/fail decision.
 Support authenticated user logins using the TLS mode.
 Support logout when no operation is performed on the user session within a specified
interval. If an account that has logged in does not exchange information with the TOE
within the specified interval, it will be automatically logged out. The account needs to be
authenticated again for a new login. By default, the inactivity period is 60 minutes.
 Support maximum attempts for authentication failures within certain period of time. By
default, after five consecutive login attempts using one account fail and the interval
between two attempts is shorter than 3 minutes, the account is locked. An alarm is
reported after the account is locked. The default value of lock period is 15 minutes, the
configurable range is between 1 and 1000 minutes. So the user account will be
automatically unlocked after 15 minutes by default.
 Support access limit by IP-based ACL. A series of whitelists and blacklists are set to
filter IP addresses and data on ports. Unauthorized IP addresses and communication
ports cannot access the system.
 Support for user individual attributes including the user ID, user level, and password to
ensure that each user is unique in the system. Both the user ID and password have a
validity period, the user cannot log in to the system If the validity period expires.
 Using the SFTP application requires Administrator users to unlock the private RSA key
for SFTP first with the key’s passphrase. When the key is generated, the Administrator is
6 TOE Summary Specification
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allowed to set a passphrase of 12 to 16 characters. The passphrase complexity
requirements are the same as for user passwords.
(FIA_AFL.1, FIA_ATD.1, FIA_UAU.2, FIA_UAU.5, FIA_UID.2, FTA_TSE.1, FTA_SSL.3)
Table 6-1 SFR to TSF mapping
SFR TSF
FIA_AFL.1 Support maximum attempts for authentication failures
within certain period of time. By default, after five
consecutive login attempts using one account fail and the
interval between two attempts is shorter than 3 minutes, the
account is locked. An alarm is reported after the account is
locked.
FIA_ATD.1 Support authentication via local passwords. This function
is achieved by comparing user information input with
pre-defined user information stored in the flash.
Passwords have a length of 16 characters. The TOE
enforces a password complexity policy of at least contains
three types of the following character types: capital letter,
small letter, number, and special character.
Using the SFTP application requires Administrator users to
unlock the private RSA key for SFTP first with the key’s
passphrase. When the key is generated, the Administrator
must set a passphrase of 12 to 16 characters. The
passphrase complexity requirements are the same as for
user passwords.
Support for user individual attributes including the user ID,
user level, and password to ensure that each user is unique
in the system. Both the user ID and password have a
validity period, the user cannot log in to the system If the
validity period expires.
FIA_UAU.2 The TOE enforces that every user needs to successfully
authenticate himself by username and password before he
can use any TOE security function other than the
identification and authentication function.
The TOE provides two session establishment mechanisms
requiring identification and authentication of users: via
MML commands for file uploads and downloads over
SFTP and via QX commands for all other administrative
activities.
FIA_UAU.5 Support authentication via local passwords. This function
is achieved by comparing user information input with
pre-defined user information stored in the flash.
Support authentication via the remote RADIUS
authentication server. The TOE hands identification and
authentication information provided by the user during
login to the RADIUS server and enforces the RADIUS
server’s pass/fail decision.
FIA_UID.2 The TOE enforces that every user is successfully identified
6 TOE Summary Specification
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by username when providing username and password for
authentication before he can use any TOE security function
other than the identification and authentication function.
FTA_TSE.1 Support access limit by IP-based ACL. A series of
whitelists and blacklists are set to filter IP addresses and
data on ports. Unauthorized IP addresses and
communication ports cannot access the system.
Support authenticated user logins using the TLS mode.
FTA_SSL.3 Support logout when no operation is performed on the user
session within a specified interval. If an account that has
logged in does not exchange information with the TOE
within the specified interval, it will be automatically
logged out. The account needs to be authenticated again for
a new login. By default, the inactivity period is 60 minutes.
6.2 Authorization
The TOE enforces an access control by supporting following functions in Table 6-2:
 There are five hierarchical user groups (from low to high): monitor, operator,
maintenance, administrator and super administrator.
 A user group is assigned to each account.
 Accounts are managed in groups. When an account is created, it is authorized to perform
certain operations and is not allowed to perform unauthorized operations. If an account is
used to attempt any unauthorized operation, an error message is displayed and the
attempt is audited. The authority of each user group is specified in Table 6-2.
 Every management command has a command level associated to it. A user can use this
command if his user level dominates the command level, i.e., if his user level is
hierarchically equal or higher than the command level. User groups match to command
levels as follows:
6 TOE Summary Specification
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Table 6-2 Correspondence of user groups and command levels
User group Command Level
Monitor Monitor
Operate Monitor
Operate
Maintenance Monitor
Operate
Maintenance
Administrator Monitor
Operate
Maintenance
Manage
Super Administrator Monitor
Operate
Maintenance
Manage
Debug
 In order to prevent possible privilege escalations, users can change user attributes (esp.
their own attributes) only for users up to their own user level and cannot increase the
user level attribute beyond their own user level. Command levels cannot be changed by
users.
 Both administrator and super administrator accounts belong to the administrator level
and both have the privilege to create other administrator or super administrator accounts.
The super administrator is a special administrator (expert role for equipment diagnoses
and maintenance) that can execute the debugging commands. Only Administrators and
Super administrators can query and dump operation logs and security logs.
(FDP_ACC.1, FDP_ACF.1, FIA_ATD.1, FIA_UID.2, FMT_MOF.1, FMT_MSA.1/ACFATD,
FMT_MSA.1/IFF, FMT_MSA.3/ACFATD, FMT_MSA.3/IFF, FMT_SMF.1, FMT_SMR.1)
Table 6-3 SFR to TSF mapping
SFR TSF
FDP_ACC.1 Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 6-2.
In order to prevent possible privilege escalations, users can
change user attributes (esp. their own attributes) only for
users up to their own user level and cannot increase the
user level attribute beyond their own user level. Command
levels cannot be changed by users.
6 TOE Summary Specification
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FDP_ACF.1,
FIA_ATD.1,
FIA_UID.2
There are five hierarchical user groups (from low to high):
monitor, operator, maintenance, administrator and super
administrator.
A user group is assigned to each account.
Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 6-2.
Every management command has a command level
associated to it. A user can use this command if his user
level dominates the command level, i.e., if his user level is
hierarchically equal or higher than the command level.
User groups match to command levels as follows:
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
FMT_MOF.1 Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 6-2.
Every management command has a command level
associated to it. A user can use this command if his user
level dominates the command level, i.e., if his user level is
hierarchically equal or higher than the command level.
User groups match to command levels as follows:
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
FMT_MSA.1/ACFATD
FMT_MSA.1/IFF
FMT_MSA.3/ACFATD
FMT_MSA.3/IFF
FMT_SMF.1
Accounts are managed in groups. When an account is
created, it is authorized to perform certain operations and is
not allowed to perform unauthorized operations. If an
account is used to attempt any unauthorized operation, an
error message is displayed and the attempt is audited. The
authority of each user group is specified in table 6-2.
Every management command has a command level
associated to it. A user can use this command if his user
level dominates the command level, i.e., if his user level is
6 TOE Summary Specification
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hierarchically equal or higher than the command level.
User groups match to command levels as follows:
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
FMT_SMR.1 There are five hierarchical user groups (from low to high):
monitor, operator, maintenance, administrator and super
administrator.
A user group is assigned to each account.
Both administrator and super administrator accounts
belong to the administrator level and both have the
privilege to create other administrator or super
administrator accounts. The super administrator is a special
administrator (expert role for equipment diagnoses and
maintenance) that can execute the debugging commands.
Only Administrators and Super administrators can query
and dump operation logs and security logs.
6.3 Auditing
The TOE provides an audit trail consisting of operation logs and security logs:
 Support recording non-query operations in the operation logs, including the operation
type (if applicable), operation object (if applicable), access IP address (if applicable),
date and time, the outcome, and user name (if applicable).
 Support recording security-related configuration operations in the security logs,
including user management, security settings, and the attempts of unauthorized
operations. The security logs provide the information about the account name, address of
the client, date and time, operation, and outcome.
 For all audit events the corresponding timestamp will be recorded together with the
event.
 Only Administrators and Super administrators can query and dump operation logs and
security logs, and the Administrators and Super administrators can know that whoever
accesses and logins the system and any operation on the system according to the content
of the security log and the operation log.
 The operation logs and security logs allow no manual changes.
 The operation logs and security logs can be completely recovered even after a
power-outage restart of the system.
 The operation logs and security logs keep records in time sequence. After the memory is
exhausted, the earliest records of the logs are overwritten by the latest records. Once the
memory is exhausted, a performance event is reported.
 Support for user individual attributes including the user ID ensures that each user is
unique in the system and that user-related audit events can be attributed to a user.
6 TOE Summary Specification
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(FAU_GEN.1, FAU_GEN.2, FAU_SAR.1, FAU_SAR.2, FAU_STG.1, FAU_STG.3)
Table 6-4 SFR to TSF mapping
SFR TSF
FAU_GEN.1 Support recording non-query operations in the operation
logs, including the operation type, operation object, access
IP address, date and time, the outcome, and user name.
Support recording security-related configuration operations
in the security logs, including user management, security
settings, and the attempts of unauthorized operations. The
security logs provide the information about the account
name, address of the client, date and time, operation, and
outcome.
For all audit events the corresponding timestamp will be
recorded together with the event.
FAU_GEN.2 Support recording non-query operations in the operation
logs, including the operation type, operation object, access
IP address, date and time, the outcome, and user name.
FAU_SAR.1
FAU_SAR.2
Only Administrators and Super administrators can query
and dump operation logs and security logs. So only the
Administrators and Super administrators can know that
whoever accesses and logins the system and any operation
on the system according to the content of the security log
and the operation log.
FAU_STG.1 The operation logs and security logs allow no manual
changes.
FAU_STG.3 The operation logs and security logs can be completely
recovered even after a power-outage restart of the system.
The operation logs and security logs keep records in time
sequence. After the memory is exhausted, the earliest
records of the logs are overwritten by the latest records.
Once the memory is exhausted, a performance event is
reported.
6.4 Communication Security
The TOE provides communication security by implementing trusted channels between the
EMS and the TOE using the TLS communication protocol. The TLS1.2 protocols is
implemented to provide communication channels. The TOE acts as a TLS server and allows
other trusted IT products to initiate communication. The TLS certificates for server
authentication are managed and issued by users. The TOE supports TLS certificate loading
and activation. Client authentication is performed password-based on the application layer.
The TOE has been loaded with a preset TLS certificate before delivery. If the
below-mentioned TLS_RSA ciphers are used, the RSA public key is used for authentication
and key exchange. Using the below TLS_DHE ciphers the standard Diffie-Hellman
parameters P and G.
The following TLS ciphers are supported by the TOE:
6 TOE Summary Specification
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 TLS_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC5288
 TLS_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC5288
 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as defined in RFC5288
 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 as defined in RFC5288
 TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC5246
 TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC5246
 TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as defined in RFC5246
 TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as defined in RFC5246
 TLS_RSA_WITH_AES_128_CBC_SHA as defined in RFC3268
 TLS_RSA_WITH_AES_256_CBC_SHA as defined in RFC3268
 TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined in RFC3268
 TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined in RFC3268
The TOE provides communication security by establishing a trusted channel for secure file
transfer based on the SSH(SFTP) protocol. The TOE acts as a SFTP client which initiates
communication with other trusted IT products. The SSH/SFTP-based communication is based
on the following algorithms and ciphers:
 Authentication can be performed either public key-based or password-based as
described in RFC 4252.
 Key exchange is performed using diffie-hellman-group 14-sha1
 The public key algorithm of the SSH transport implementation is ssh-rsa.
 For data encryption AES128-CTR, AES192-CTR and AES256-CTR are supported.
 For data integrity protection HMAC-SHA1 is supported.
The TOE supports session time-out after a configurable time of user inactivity. After the
session has expired, the equipment user account will be automatically logged out.
The TOE supports denying session establishment based on authentication failure (i.e. device
authentication failure for TLS and user authentication as well as device authentication failure
for SFTP).
The TOE supports denying session establishment based on source IP address with is based on
the ACL mechanisms of the Management Traffic Flow Control TOE Security Function.
(FTA_SSL.3, FTA_TSE.1, FTP_ITC.1/TLS, FTP_ITC.1/SFTP)
Table 6-5 SFR to TSF mapping
SFR TSF
FTA_SSL.3 The TOE supports session time-out after a configurable
time of user inactivity. After the session has expired, the
equipment user account will be automatically logged out.
FTA_TSE.1 The TOE supports denying session establishment based on
authentication failure (i.e. device authentication failure for
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Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 47
TLS and user authentication as well as device
authentication failure for SFTP).
The TOE supports denying session establishment based on
source IP address with is based on the ACL mechanisms of
the Management Traffic Flow Control TOE Security
Function.
FTP_ITC.1/TLS The TOE provides communication security by
implementing trusted channels between the EMS and the
TOE using the TLS communication protocol. The TLS1.2
protocols is implemented to provide communication
channels. The TOE acts as a TLS server and allows other
trusted IT products to initiate communication. The TLS
certificates for server authentication are managed and
issued by users. The TOE supports TLS certificate loading
and activation. Client authentication is performed
password-based on the application layer. The TOE has
been loaded with a preset TLS certificate before delivery.
The following TLS ciphers are supported by the TOE:
TLS_RSA_WITH_AES_128_GCM_SHA256 as defined in
RFC5288,
TLS_RSA_WITH_AES_256_GCM_SHA384 as defined in
RFC5288,
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 as
defined in RFC5288,
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 as
defined in RFC5288,
TLS_RSA_WITH_AES_128_CBC_SHA256 as defined in
RFC5246,
TLS_RSA_WITH_AES_256_CBC_SHA256 as defined in
RFC5246,
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 as
defined in RFC5246,
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 as
defined in RFC5246,
TLS_RSA_WITH_AES_128_CBC_SHA as defined in
RFC3268,
TLS_RSA_WITH_AES_256_CBC_SHA as defined in
RFC3268,
TLS_DHE_RSA_WITH_AES_128_CBC_SHA as defined
in RFC3268,
TLS_DHE_RSA_WITH_AES_256_CBC_SHA as defined
in RFC3268
FTP_ITC.1/SFTP The TOE provides communication security by establishing
a trusted channel for secure file transfer based on the
SSH(SFTP) protocol. The TOE acts as a SFTP client which
initiates communication with other trusted IT products. The
SSH/SFTP-based communication is based on the following
algorithms and ciphers:
Authentication can be performed either public key-based or
password-based as described in RFC 4252.
Key exchange is performed using diffie-hellman-group
6 TOE Summary Specification
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 48
14-sha1
The public key algorithm of the SSH transport
implementation is ssh-rsa.
For data encryption AES128-CTR, AES192-CTR and
AES256-CTR are supported.
For data integrity protection HMAC-SHA1 is supported.
6.5 Management Traffic Flow Control
The TOE uses ACL to deny unwanted network traffic on management interfaces and allow
wanted network traffic on management interfaces.
IP-based ACL is provided to filter traffic flow on management interface by matching all or
some attributes, including the source IP address, destination IP address, IP protocol number,
TCP/UDP source port, and TCP/UDP destination port, and then performs actions such as
permit, or discard accordingly.
(FDP_IFC.1, FDP_IFF.1, FMT_MSA.1/IFF, FMT_MSA.3/IFF, FMT_SMF.1, FTA_TSE.1)
Table 6-6 SFR to TSF mapping
SFR TSF
FDP_IFC.1 The TOE uses ACL to deny unwanted network traffic on
management interfaces and allow wanted network traffic
on management interfaces.
FDP_IFF.1,
FMT_MSA.1/IFF,
FMT_MSA.3/IFF
IP-based ACL is provided to filter traffic flow on
management interface by matching all or some attributes,
including the source IP address, destination IP address, IP
protocol number, TCP/UDP source port, and TCP/UDP
destination port, and then performs actions such as permit,
or discard accordingly. The TOE enforces application of
ACLs to IP packets from the management network.
FMT_SMF.1 The TOE supports creation, modification and deletion of
ACLs.
FTA_TSE.1 IP-based ACL is provided to filter traffic flow on
management interface by matching all or some attributes,
including the source IP address, destination IP address, IP
protocol number, TCP/UDP source port, and TCP/UDP
destination port, and then performs actions such as permit,
or discard accordingly, thus being able to deny session
establishment based on those criteria.
6 TOE Summary Specification
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 49
6.6 Security Management
The TOE allows management of the equipment network by different users. The TOE can be
configured to grant each user the access right to the equipment network resources that are
required for user operations. The functions mainly include:
 User management, including the user name and passwords.
 Access control management, including the association of users and corresponding
privileged functionalities.
 Enabling/disabling of TLS for the communication between EMS and the TOE.
 Definition of IP addresses and address ranges for clients and server that are allowed to
connect to the TOE.
 Set-up and modification of ACL policy.
All of these management options are generally available via the EMS.
Detailed functions mainly include:
 Support remote TOE management using TLS.
 Support automatic account logout when no operation is performed on the user session
within a specified interval.
 Support the maximum attempts for authentication failures within certain period of time.
 Support ACL filtering based on IP protocol number, source and/or destination IP address,
or source and/or destination port.
 Support the address configuration of the RADIUS server.
 Support the address configuration of the Syslog server.
 Support the address configuration of the NTP server.
 Support the address configuration of the SFTP server.
 Support setting the time information on the TOE.
The TOE management can use two kinds of sessions for administrative activities based on
different protocols:
 QX is a proprietary interface between EMS and TOE. EMS uses QX commands to
implement OAM (Operation Administration and Maintenance) function on TOE. The
TOE provides abundant QX commands to allow the users to manage the TOE.
 MML commands are used mainly for local maintenance tasks like fault location and
software upgrades. For this evaluation, MML commands are used to up- and
download files via the TOE’s SFTP client.
Note that users cannot have QX and MML sessions at the same time.
(FMT_MOF.1, FMT_MSA.1/ACFATD, FMT_MSA.1/IFF, FMT_MSA.3/ACFATD,
FMT_MSA.3/IFF, FMT_SMF.1, FMT_SMR.1)
Table 6-7 SFR to TSF mapping
SFR TSF
FMT_MOF.1,
FMT_MSA.1/ACTATD,
FMT_MSA.1/IFF,
FMT_MSA.3/ACFATD,
FMT_SMF.1,
The TOE allows management of the telecommunications
network by different users. The TOE can be configured to
grant each user the access right to the telecommunications
network resources that are required for user operations.
The functions mainly include:
6 TOE Summary Specification
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 50
FMT_SMR.1 User management, including the user name and passwords.
Access control management, including the association of
users and corresponding privileged functionalities.
Enabling/disabling of TLS for the communication between
EMS and the TOE.
Definition of IP addresses and address ranges for clients
and server that are allowed to connect to the TOE.
Set-up and modification of ACL policy.
All of these management options are generally available
via the EMS.
Detailed functions mainly include:
Support remote TOE management using TLS.
Support SFTP enable and disable.
Support automatic account logout when no operation is
performed on the user session within a specified interval.
Support the maximum attempts for authentication failures
within certain period of time.
Support configuration of the RADIUS server.
Support configuration of the Syslog server.
Support configuration of the NTP server.
Support configuration of the SFTP server.
Support setting the time information on the TOE.
FMT_MSA.3/IFF The ACL filtering mechanism is enforcing the
Management Network Filtering SFP. By default, no ACL
rules are configured therefore all traffic will be allowed to
pass. Administrators and Super-Administrators can add,
delete and modify ACL rules. The ACL rules will take
effect immediately after they are added. The ACL filtering
mechanism does only accept connections that are explicitly
permitted in the ACL filtering rules. By adding
corresponding ACL rules, Administrators and
Super-Administrators can change the default behavior
where all traffic is allowed to pass.
6.7 Time
The TOE provides its own clock and timestamps to correctly record logs in time sequence or
other place wherever the time shall be used. The time information on the TOE can either be
set by a user with sufficient access rights on the device or obtained from external NTP servers.
OptiX RTN 905 1E/2E/2F Radio Transmission System
Product Description AAbbreviations, Terminology and References
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 1
A Abbreviations, Terminology and
References
A.1 Abbreviations
CC Common Criteria
DCN Data Communications Network (the management network)
EMS Element Management System
LCT Local Craft Terminal
LMT Local Maintenance Terminal
MSTP Multi-Service Transmission Platform
RTN Radio Transmission Node
OTN Optical Transport Network
PP Protection Profile
RADIUS Remote Authentication Dial-In User Service
RMT Remote Maintenance Terminal
RSA Rivest Shamir Adleman
SDH Synchronous Digital Hierarchy
SFR Security Functional Requirement
SFTP Secure File Transfer Protocol
SSH Secure Shell
ST Security Target
TLS Transport Layer Security
TOE Target of Evaluation
TSF TOE Security Functions
OptiX RTN 905 1E/2E/2F Radio Transmission System
Product Description AAbbreviations, Terminology and References
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 2
A.2 Terminology
This section contains definitions of technical terms that are used with a meaning specific to
this document. Terms defined in the [CC] are not reiterated here, unless stated otherwise.
Administrator: An administrator in the content is the user of administrator group or super
administrator group
User: A user is a human or a product/application using the TOE.
A.3 References
[CC] Common Criteria for Information Technology Security Evaluation, Part
1-3, Version 3.1 Revision 5, April 2017
[CEM] Common Methodology for Information Technology Security Evaluation,
Evaluation methodology, Version 3.1 Revision 5, April 2017
[AIS20] Functionality Classes and Evaluation Methodology for Deterministic
Random Number Generators, Version 2.0, 2 December 1999
[FIPS 180-4] FIPS PUB 180-4 – Secure Hash Standard (SHS)
[FIPS 186-4] FIPS PUB 186-4 – Digital Signature Standard (DSS), July 2013
[FIPS 197] FIPS PUB 197 – Advanced Encryption Standard (AES), November 26,
2001
[FIPS 198-1] FIPS PUB 198-1 - The Keyed-Hash Message Authentication Code
(HMAC), July 2008
[NIST SP800-38A] NIST Special Publication 800-38A – Recommendation for Block
Cipher Modes of Operation: Methods and Techniques, December 2001
[NIST SP800-38D] NIST Special Publication 800-38D – Recommendation for Block
Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC,
November 2007
[NIST SP800-56A] NIST Special Publication 800-56A Rev. 3 – Recommendation for
Pair-Wise Key Establishment Schemes Using Discrete Logarithm
Cryptography, April 2018
[NIST SP800-56B] NIST Special Publication 800-56B Rev. 2 – Recommendation for
Pair-Wise Key-Establishment Schemes Using Integer Factorization
Cryptography, July 2018
[NIST SP800-90A] NIST Special Publication 800-90A Rev. 1 - Recommendation for
Random Number Generation Using Deterministic Random Bit
Generators, June 2015
[PKCS#1 V2.1] PKCS #1 v2.1: RSA Cryptography Standard, April 2004
[PKCS#3] PKCS #3: Diffie-Hellman Key- Agreement Standard, version 1.4,
November 1993
[RFC 1321] The MD5 Message-Digest Algorithm, R. Rivest, April 1992
[RFC 2104] RFC 2104 - HMAC: Keyed-Hashing for Message Authentication,
February 1997
OptiX RTN 905 1E/2E/2F Radio Transmission System
Product Description AAbbreviations, Terminology and References
Issue v2.0 (2020-11-25) Copyright © Huawei Technologies Co., Ltd. 3
[RFC 3268] Advanced Encryption Standard (AES) Ciphersuites for Transport Layer
Security (TLS), P. Chown, June 2002
[RFC 3447] Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography
Specifications, Version 2.1, J. Jonsson, B. Kaliski, 2003-02-01
[RFC 3526] RFC 3526 - More Modular Exponential (MODP) Diffie-Hellman
groups for Internet Key Exchange (IKE), May 2003
[RFC 4251] RFC 4251 – The Secure Shell (SSH) Protocol Architecture, January
2006
[RFC 4252] RFC 4252 - The Secure Shell (SSH) Authentication Protocol, January
2006
[RFC 4253] RFC 4253 - The Secure Shell (SSH) Transport Layer Protocol, January
2006
[RFC 4254] RFC 4254 - The Secure Shell (SSH) Connection Protocol, January 2006
[RFC 4344] The Secure Shell (SSH) Transport Layer Encryption Modes, M. Bellare,
T. Kohno, C. Namprempre, 2006-01-01
[RFC 4346] RFC 4346 - The Transport Layer Security (TLS) Protocol Version 1.1,
April 2006
[RFC 5246] RFC 5246 - The Transport Layer Security (TLS) Protocol Version 1.2,
August 2008
[RFC 5288] AES Galois Counter Mode (GCM) Cipher suited for TLS, J. Salowey, A.
Choudhury, D. McGrew 2008-08-01
[RFC 5289] TLS Elliptic Curve Cipher Suites with SHA-256/384 and AES Galois
Counter Mode (GCM), August 2008
[RFC 8439] ChaCha20 and Poly1305 for IETF Protocols, June 2018
[RFC 6655] AES-CCM Cipher Suites for Transport Layer Security (TLS), July
2012
[RFC 5116] An Interface and Algorithms for Authenticated Encryption, January
2008
[RFC 8018] PKCS #5: Password-Based Cryptography Specification Verion 2.1, B.
Kaliski, 2017-01-01