EPSON
LX-10020M/WF-M21000 with FAX
Security Target
ST Version: Rev.05
Created on: July 30, 2021
Created by: SEIKO EPSON CORPORATION
This document is a translation of the evaluated and certified security target
written in Japanese.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
1
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Revision History
Rev.
Revised
Section
Revision Details
Design Dept.
Creation/Revision
Date
Created
by
Checked
by
Approved
by
01 • Entire
document
• Newly create Yoshioka Kawahara
Niki
Narusawa 2021/03/12
02 • Chapters
1.1, 1.4
• Chapters
6.1, 7.4
• Chapters
6.1, 7.2
• Alteration of matters
pointed out for revision
• Alteration of matters
pointed out for revision
• Error correction
Yoshioka Kawahara
Niki
Narusawa 2021/04/05
03 • Chapters
1.1, 1.2, 1.4
• Error correction Yoshioka Kawahara
Niki
Narusawa 2021/05/12
04 • Chapters
1.1, 1.4
• Error correction Yoshioka Kawahara
Niki
Narusawa 2021/05/28
05 • Chapters
1.1, 1.4, 1.5
• Chapters
3.1, 3.3, 3.4
• Chapters
3.5, 6.3
• Alteration of matters
pointed out for revision
• Alteration of matters
pointed out for revision
• Alteration of matters
pointed out for revision
Yoshioka Kawahara
Niki
Narusawa 2021/07/30
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
2
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Contents
1. ST Introduction................................................................................................................................... 4
1.1. ST Reference.............................................................................................................................. 4
1.2. TOE Reference ........................................................................................................................... 4
1.3. TOE Overview............................................................................................................................. 4
TOE Type ................................................................................................................................ 4
TOE Usage .............................................................................................................................. 4
Major Security Functions of TOE ........................................................................................... 6
1.4. TOE Description.......................................................................................................................... 7
Definition of Users.................................................................................................................... 7
Physical Boundary of TOE ....................................................................................................... 7
Logical Boundary of TOE ..................................................................................................... 10
Hardware/software/firmware other than the TOE but that is required for the TOE ................. 12
1.5. Terminology/Abbreviations........................................................................................................ 13
2. Conformance Claims........................................................................................................................ 15
2.1. CC Conformance Claim ............................................................................................................ 15
2.2. PP Conformance Claim............................................................................................................. 15
2.3. Package Conformance Claim ................................................................................................... 15
2.4. SFR Package functions............................................................................................................. 15
2.5. SFR Package attributes ............................................................................................................ 16
2.6. PP Conformance Rationale....................................................................................................... 16
Consistency Claim with TOE Type in PP................................................................................ 16
Consistency Claim with Security Problems and Security Objectives in PP ............................ 17
Consistency Claim with Security Requirements in PP............................................................ 17
3. Security Problem Definition.............................................................................................................. 19
3.1. Protected Assets ....................................................................................................................... 19
3.2. Threats agents.......................................................................................................................... 20
3.3. Threats to TOE Assets.............................................................................................................. 21
3.4. Organizational Security Policies for the TOE ............................................................................ 21
3.5. Assumptions ............................................................................................................................. 21
4. Security Objectives .......................................................................................................................... 23
4.1. Security Objectives for the TOE................................................................................................ 23
4.2. Security Objectives for the IT environment ............................................................................... 23
4.3. Security Objectives for the non-IT environment ........................................................................ 24
4.4. Security Objectives rationale..................................................................................................... 24
5. Extended components definition ...................................................................................................... 29
5.1. FPT_FDI_EXP Restricted forwarding of data to external interfaces ......................................... 29
6. Security Requirements..................................................................................................................... 31
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
3
©SEIKO EPSON CORPORATION 2020. All rights reserved.
6.1. Security Functional Requirements ............................................................................................ 31
Class FAU: Security audit....................................................................................................... 31
Class FDP: User data protection............................................................................................ 33
Class FIA: Identification and authentication ........................................................................... 37
Class FMT: Security management ......................................................................................... 41
Class FPT: Protection of the TSF ........................................................................................... 47
Class FTA: TOE access ......................................................................................................... 48
Class FTP: Trusted paths/channels ....................................................................................... 48
6.2. Security Assurance Requirements ............................................................................................ 49
6.3. Security Requirements Rationale.............................................................................................. 49
Security Functional Requirements rationale........................................................................... 50
Security Assurance Requirements rationale........................................................................... 55
Dependency Analysis............................................................................................................. 55
7. TOE Summary Specification ............................................................................................................ 57
7.1. User Identification and Authentication Function ........................................................................ 57
7.2. Document Access Control Function .......................................................................................... 59
7.3. Access Control Function for TOE Function ............................................................................... 65
7.4. Security Management Function ................................................................................................ 67
7.5. Residual Data Overwrite Function ............................................................................................ 69
7.6. Self-Test Function ..................................................................................................................... 69
7.7. Audit Log Function .................................................................................................................... 70
7.8. Network Protection Function..................................................................................................... 71
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
4
©SEIKO EPSON CORPORATION 2020. All rights reserved.
1. ST Introduction
This section describes the ST reference, TOE reference, TOE overview, and TOE description.
1.1. ST Reference
ST title: EPSON LX-10020M/WF-M21000 with FAX Security Target
ST version: Rev.05
Created: 2021/07/30
Created by: SEIKO EPSON CORPORATION
1.2. TOE Reference
The TOE identification information is shown below.
TOE name: EPSON LX-10020M/WF-M21000 with FAX
TOE version: 1.00
Manufacturer: SEIKO EPSON CORPORATION
The TOE is composed of the MFP (Japan: LX-10020M; overseas: WF-M21000), the fax (Japan: Super G3/G3
Multi Fax Board/PR3FB0; overseas: Super G3/G3 Multi Fax Board/PR3FB1), and the firmware (GR12L4). The
TOE can be verified by the model number of the MFP, the identification information of the fax, and the
identification information of the firmware.
1.3. TOE Overview
This section defines TOE type, TOE usage and major security functions of the TOE.
TOE Type
The TOE defined in this ST is a digital Multi Function Peripheral (MFP) that is used in a LAN environment and
has print, scan, copy, fax, and document storage functions.
TOE Usage
Figure 1-1 shows the usage environment for this TOE.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
5
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Figure 1-1 TOE Usage Environment
The TOE is connected to a LAN and a public line. The user can operate the TOE with the operation panel that
the TOE is equipped with or via the LAN. The elements of Figure 1-1 are explained below.
(1) MFP
An MFP (Multi Function Peripheral) is a peripheral device for computers that has multiple different functions
(printer, scanner, copying, fax, etc.).
(2) LAN
A LAN (Local Area Network) is a network that connects computers, communication devices, printers, and
other such equipment in the same building using cables, wireless, and other methods to transfer data.
(3) Public line
A public line is a general telephone subscriber line, and is used to send and receive faxes.
(4) Firewall
A firewall is a piece of software, device, system, or other such item that is installed at the point where a
computer or network comes into contact with an external network and relays and monitors incoming and
outgoing communication to protect the internal network from attacks from external locations.
(5) PC
A PC (Personal Computer) is a compact, low-cost general-purpose computer product for individuals.
(6) NTP server
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
6
©SEIKO EPSON CORPORATION 2020. All rights reserved.
An NTP (Network Time Protocol) server is a piece of server software that delivers data with the current
time.
(7) LDAP server (external address book)
An LDAP server is a piece of server software that uses the LDAP (Light Directory Access Protocol) to
access the directory services used as standard on TCP/IP networks such as the Internet. It also refers to
an actual physical server on which such LDAP server software is running. The LDAP server manages an
address book which is used to specify recipients of fax data.
(8) DNS server/SMTP server
A DNS server is a piece of server software that uses a DNS (Domain Name System) to convert the name
of servers on an internal network into an IP address. It also refers to an actual physical server on which
such DNS server software is running. An SMTP server is a piece of server software that uses the SMTP
(Simple Mail Transfer Protocol) to send email that is used as standard on TCP/IP networks such as the
Internet. It also refers to an actual physical server on which such SMTP server software is running. It is
used to send mail containing scan data. DNS servers and SMTP servers can be installed independently of
each other.
(9) SMB server/FTP server
An SMB server is a piece of server software that uses a SMB (Server Message Block) to perform actions
such as sharing files or printers between multiple Windows computers on a network (LAN). It also refers to
an actual physical server on which such SMB server software is running.
An FTP server is a piece of server software that uses the FTP (File Transfer Protocol) to send and receive
files. It also refers to an actual physical server on which such FTP server software is running. Both servers
are used for the transfer of scan data and fax receiving data.
These servers are used for the transfer of scan data and receiving of fax data.
(10) Printer driver
A printer driver is a piece of software that is required to connect and operate a printer from a computer. It
is a type of device driver that adds hardware control functions to operating system, and a separate one is
normally required for each type of printer and each type of operating system.
(11) Browser
A browser is a piece of software for viewing compiled data and information.
(12) Web Config
This is a function embedded in MFPs manufactured by Seiko Epson. This function makes it possible to
configure a range of settings (print settings, network settings, user restriction settings, administrator
password, etc.) for a printer or MFP by accessing it by its IP address from a browser.
Major Security Functions of TOE
The major security functions of the TOE are as below.
(1) User Identification and Authentication Function
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
7
©SEIKO EPSON CORPORATION 2020. All rights reserved.
A function to identify and authenticate users of the TOE
(2) Document Access Control Function
A function to restrict operations on user data
(3) Access Control Function for TOE Function
A function to control TOE functions
(4) Security Management Function
A function to manage security functions
(5) Residual Data Overwrite Function
A function to completely erase deleted or temporarily stored documents from an HDD or Flash ROM and
make them unrecoverable
(6) Self-Test Function
A function that verifies part of TSF and TSF implementation code are normal when the MFP starts up
(7) Audit Log Function
A function that records TOE usage and security-related events as an audit log for reference
(8) Network Protection Function
A function to prevent information leakage and data tampering from the network due to eavesdropping when
using the LAN
1.4. TOE Description
This section describes user definitions, the physical boundary of the TOE, guidance, the logical boundary of the
TOE, and the hardware/software/firmware other than TOE but that is required for the TOE.
Definition of Users
Table 1-1 describes the users for this TOE
Table 1-1 User Definitions
Name Definition
U.USER
User
Any authorized User.
U.NORMAL
Normal user
A User who is authorized to perform User Document Data processing
functions of the TOE.
U.ADMINISTRATOR
Administrator
A User who has been specifically granted the authority to manage some
portion or all of the TOE and whose actions may affect the TOE security
policy (TSP). Administrators may possess special privileges that provide
capabilities to override portions of the TSP.
Physical Boundary of TOE
Figure 1-2 shows the physical boundary of this TOE.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
8
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Figure 1-2 Physical Boundary of this TOE
The TOE is an MFP that is composed of a main board, a printer component, a scanner component, a fax
component, a network interface, and operation panel and an HDD. The elements of Figure 1-2 are explained
below.
(1) Main Board
The main board is a component on which are installed at a very high density things such as electronic
components, integrated circuits (IC), and metal wiring to connect these.
(2) F/W
F/W (Firmware) is a type of software embedded in a computer or other device and has functions that
perform basic control of things such as internal circuits and devices.
(3) SoC (processor)
An SoC (processor) is a device that performs control of various devices and calculation and processing of
data. It executes a program that is stored in memory, receives data from input devices and storage devices,
and after performing computations and processing, outputs it to an output device or storage device.
(4) RAM
RAM (Random Access Memory) is a memory device from which data can be erased and rewritten. It can
read or write data anywhere in the device in the same time (i.e. random access), but data in this memory
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
9
©SEIKO EPSON CORPORATION 2020. All rights reserved.
disappears when the power is turned off.
(5) Flash ROM
Flash ROM (Read Only Memory) is a memory device from which data can be erased and rewritten. Data
in this memory does not disappear when the power is turned off.
(6) Printer Component
The printer component is a component that controls print functions.
(7) Scanner Component
The scanner component is a component that controls scan functions.
(8) Fax Component
The fax component is a component that controls fax functions. The fax boards described in Table 1-2
provide these functions.
(9) Network Interface
The network interface is a device that is required to connect the MFP to a LAN.
(10) Operation Panel
The operation panel is a user interface device to operate the MFP.
(11) HDD
An HDD (Hard Disk Drive) is a device that stores data.
Table 1-2 shows the delivery methods for the components of the TOE.
Table 1-2 Delivery methods for components of the TOE
Component
of TOE
Format Delivery method Identification information
MFP MFP device Delivered by courier • Japan: LX-10020M
• Overseas: WF-M21000
Fax Fax board Delivered by courier • Japan: Super G3/G3 Multi Fax Board/
PR3FB0
• Overseas: Super G3/G3 Multi Fax Board/
PR3FB1
Guidance Format shown in
Table 1-3
Delivery method shown in
Table 1-3
Name and version shown in Table 1-3
Firmware Digital file Delivered by service
personnel
Version GR12L4
Table 1-3 shows the guidance that comprises this TOE.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
10
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 1-3 List of Guidance Comprising the TOE
Name Ver. Format Delivery method Target market
User’s Guide NPD6659-02 JA PDF format files Delivery over
web
Japan
Supplemental Security
Guide
NPD6692-01 JA PDF format files Delivery over
web
Japan
Before Use 4140894-00 Paper media Packaged with
MFP
Japan/overseas
User’s Guide NPD6658-02 EN PDF format files Delivery over
web
Overseas
Supplemental Security
Guide
NPD6692-01 EN PDF format files Delivery over
web
Overseas
Logical Boundary of TOE
Figure 1-3 shows the logical boundary of this TOE.
Figure 1-3 Logical Boundary of the TOE
The elements in Figure 1-3 are explained below.
 Basic functions provided by the TOE
(1) Print Function
A function to print digital documents received from a client via a LAN
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
11
©SEIKO EPSON CORPORATION 2020. All rights reserved.
(2) Scan Function
A function to read a paper document and generate a digital document from it based on operations by a
user on the operation panel
(3) Copy Function
A function to read a paper document and print a copy image of it based on operations by a user on the
operation panel
(4) Fax Function
A function to send digital documents to an external fax (fax sending function), and a function to receive
digital documents from an external fax (fax receiving function)
‒ Fax Sending Function
A function to send a digital document over a public line to an external fax device
‒ Fax Receiving Function
A function to receive a digital document over a public line from an external fax device
(5) Document Storage and Retrieval Functions
A function, called a box function, to save digital documents within the TOE and retrieve the saved digital
documents
‒ A function to save digital documents in personal boxes
A function to save digital documents read from the scanner or digital documents specified on a PC to
be saved to a personal box
‒ A function to retrieve and use digital documents that have been saved to a personal box
A function used by which digital documents saved to a personal box can be retrieved, printed,
previewed, deleted, or sent to other systems
(6) Shared-medium Interface Functions
A function for TOE users to remotely control the TOE from a client PC
(7) Operation Panel Function
A function to control the operation panel
 Security functions provided by the TOE
(1) User Identification and Authentication Function
A function to identify and authenticate users who input their user name and logon password on an operation
panel or via a network. This function includes functions for administrators to set the minimum number and
required character types for logon passwords and functions to protect authentication feedback by
displaying dummy characters when logon passwords are input. Furthermore, it includes functions to lock
out targeted accounts a specified time period after authentication fails, and functions to automatically log
off if no operations occur for a specified time period after logon.
(2) Document Access Control Function
A control function that allows users to operate user data and job data in the TOE according to the rights
assigned to each user or to the rights assigned to the role of a user that has been authenticated by the
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
12
©SEIKO EPSON CORPORATION 2020. All rights reserved.
User Identification and Authentication Function.
(3) Access Control Function for TOE Function
A control function that allows only permitted users to use the basic functions of the TOE based on the
access control rules for users that have been authenticated by the User Identification and Authentication
Function. The basic functions of the TOE are as follows.
‒ Print function
‒ Scan function
‒ Copy function
‒ Fax receiving and sending functions
‒ Document storage and retrieval functions
(4) Security Management Function
The Security Management Function is a function to manage the following items based on the rights
assigned to roles through the operation panel or network.
‒ Security Attributes
‒ TSF data
‒ Management Functionality
‒ User roles
(5) Residual Data Overwrite Function
A function to make residual information impossible to reuse by overwriting it with a specified value after the
data has been deleted by users or after the data has been saved to an HDD or flash ROM, and is no longer
needed, while using the basic functions, such as print, scan, copy, and fax, of the TOE.
(6) Self-Test Function
A function to detect illegal modifications to the TOE firmware and to verify that parts of the TSF data and
TSF implementation codes are complete and that parts of the TSF operate normally when the TOE starts
up.
(7) Audit Log Function
A function that records a log of security-related events and a history of who, when, and how the TOE is
operated. The log, which is a readable file format that only administrators can audit, can be downloaded
and deleted, but the audit log itself is stored on the TOE and cannot be edited, even by administrators.
(8) Network Protection Function
A function that uses IPsec encrypted communications to prevent information leakage and data tampering
due to eavesdropping on the network while the TOE is communicating with various servers and client PCs
via wired LAN. Functions are also provided so the TOE does not directly transfer information between
telephone lines and wired LAN without additional processing by TSF.
Hardware/software/firmware other than the TOE but that is required for the TOE
To use the TOE, the following software and the hardware on which they run are required.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
13
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 1-4 Non-TOE Software Required for the TOE
Software Version used for evaluation
NTP server Microsoft Windows Server 2016 Standard
LDAP server Microsoft Windows Server 2016 Standard
DNS server Microsoft Windows Server 2016 Standard
SMTP server hMailServer 5.6.7-B2425
SMB server Microsoft Windows Server 2016 Standard
FTP server Microsoft Windows Server 2016 Standard
Printer driver For Microsoft Windows
Japanese version: Epson Printing System (J) Version 3.01.00
English version: Epson Printing System (A) Version 3.01.00
Browser Microsoft Edge
*The letter in the brackets for the English version of the printer driver indicates the time zone of the PC on which
it is installed.
If the time zone of the PC used is not North America, a “W” is displayed in the brackets, but this is the same
driver.
1.5. Terminology/Abbreviations
Table 1-5 defines the meaning of the specific terminology and abbreviations in this ST.
Table 1-5 Terminology/Abbreviations
Glossary Definition
User ID of normal users Attributes assigned to U.NORMAL, D.DOC, and D.FUNC
A unique identifier is assigned to U.NORMAL
User role Attribute assigned to U.USER
There are normal users and administrator
Normal users are assigned to U.NORMAL, and administrator is assigned to
U.ADMINISTRATOR
Available Function List Attribute assigned to U.NORMAL
For U.NORMAL, a list of functions for which usage is permitted is assigned
The functions are print (PRT), scan (SCAN), copy (CPY), fax receiving (FAXIN),
fax sending (FAXOUT), and document storage and retrieval (DSR)
MFP function A collective name for print, scan, copy, fax, and document storage and retrieval
functions provided by the TOE
Function type Attributes assigned to MFP functions
Print attributes, scan attributes, copy attributes, fax attributes, and document
storage and retrieval attributes
Document data
attributes
Attributes assigned to D.DOC, and D.FUNC
There are print, scan, copy, fax receiving, fax sending, and document storage and
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
14
©SEIKO EPSON CORPORATION 2020. All rights reserved.
retrieval
Job A processing unit from the start to the end of processing by the MFP function on a
D.DOC
Password Print Job A print job to which User IDs of normal users and passwords of normal users have
been added
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
15
©SEIKO EPSON CORPORATION 2020. All rights reserved.
2. Conformance Claims
This section describes Conformance Claim.
2.1. CC Conformance Claim
The CC conformance claim for this ST is detailed below.
Common Criteria version: Version 3.1 Release 5
Common Criteria conformance: Part 2 extended and Part 3 conformant
2.2. PP Conformance Claim
The PP conformance claim for this ST is detailed below.
PP identification: U.S. Government Approved Protection Profile – U.S. Government
Protection Profile for Hardcopy Devices Version 1.0
(IEEE Std 2600.2 TM-2009)
PP version: 1.0
Notes: This PP conforms to "IEEE Standard Protection Profile for Hardcopy Devices in IEEE Std 2600-2008,
Operational Environment B", published in Common Criteria Portal, and also satisfies "CCEVS Policy Letter #20".
2.3. Package Conformance Claim
The package conformance claim for this ST is detailed below.
This ST conforms to Common Criteria Evaluation Assurance Level (EAL) 2 augmented by ALC_FLR.2.SFR
Packages conform to PP are as follows.
- 2600.2-PRT, SFR Package for Hardcopy Device Print Functions, Operational Environment B (Package
Version 1.0, dated March 2009)
- 2600.2-SCN, SFR Package for Hardcopy Device Scan Functions, Operational Environment B (Package
Version 1.0, dated March 2009)
- 2600.2-CPY, SFR Package for Hardcopy Device Copy Functions, Operational Environment B (Package
Version 1.0, dated March 2009)
- 2600.2-FAX, SFR Package for Hardcopy Device FAX Functions, Operational Environment B (Package
Version 1.0, dated March 2009)
- 2600.2-DSR, SFR Package for Hardcopy Device Document Storage and Retrieval (DSR) Functions,
Operational Environment B (Package Version 1.0, dated March 2009)
- 2600.2-SMI, SFR Package for Hardcopy Device Shared-medium Interface Functions, Operational
Environment B (Package Version 1.0, dated March 2009)
2.4. SFR Package functions
Functions perform processing, storage, and transmission of data that may be present in HCD products. The
functions that are allowed, but not required in any particular conforming Security Target or Protection Profile,
are listed in Table 2-1.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
16
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 2-1 SFR Package Functions
Name Definition
F.PRT Printing: a function in which electronic document input is converted to physical document output
F.SCN Scanning: a function in which physical document input is converted to electronic document
output
F.CPY Copying: a function in which physical document input is duplicated to physical document output
F.FAX Faxing: a function in which physical document input is converted to a telephone-based
document facsimile (fax) transmission, and a function in which a telephone-based document
facsimile (fax) reception is converted to physical document output
F.DSR Document storage and retrieval: a function in which a document is stored during one job and
retrieved during one or more subsequent jobs
F.SMI Shared-medium interface: a function that transmits or receives User Data or TSF Data over a
communications medium which, in conventional practice, is or can be simultaneously accessed
by multiple users, such as wired network media and most radio-frequency wireless media
2.5. SFR Package attributes
When a function is performing processing, storage, or transmission of data, the identity of the function is
associated with that particular data as a security attribute. This attribute in the TOE model makes it possible to
distinguish differences in Security Functional Requirements that depend on the function being performed. The
attributes that are allowed, but not required in any particular conforming Security Target or Protection Profile,
are listed in Table 2-2.
Table 2-2 SFR Package Attributes
Name Definition
+PRT Indicates data that are associated with a print job.
+SCN Indicates data that are associated with a scan job.
+CPY Indicates data that are associated with a copy job.
+FAXIN Indicates data that are associated with an inbound (received) fax job.
+FAXOUT Indicates data that are associated with an outbound (sent) fax job.
+DSR Indicates data that are associated with a document storage and retrieval job.
+SMI Indicates data that are transmitted or received over a shared-medium interface.
2.6. PP Conformance Rationale
This section sets forth the consistency claim with TOE type in PP, the consistency claim with PP security
problems and security objectives, and the consistency claim with PP security requirements.
Consistency Claim with TOE Type in PP
This TOE is an MFP that has print, scan, copy, fax, document storage and retrieval, and shared-medium
interface functions, so its type is consistent with the hardcopy device (HCD) noted in "2600.2, Protection Profile
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
17
©SEIKO EPSON CORPORATION 2020. All rights reserved.
for Hardcopy Devices, Operational Environment B." The TOE does not have a removable HDD or any other
non-volatile storage system, so of the seven SFR packages defined in "2600.2, Protection Profile for Hardcopy
Devices, Operational Environment B", it conforms to all but "2600.2-NVS, SFR Package for Hardcopy Device
Nonvolatile Storage Functions, Operational Environment B."
Consistency Claim with Security Problems and Security Objectives in PP
The security problems in this ST are exactly the same as in the security problems demanded to be solved in
the PP, and are consistent. In terms of security objectives, OE.AUDIT_STORAGE.PROTECTED and
OE.AUDIT_ACCESS.AUTHORIZED are deleted from the security objectives of the IT environment, and
O.AUDIT_STORAGE.PROTECTED and O.AUDIT_ACCESS.AUTHORIZED are added as the security
objectives for the TOE. The internal functions that implement O.AUDIT_STORAGE.PROTECTED and
O.AUDIT_ACCESS.AUTHORIZED are equivalent to the demands in OE.AUDIT_STORAGE.PROTECTED and
OE.AUDIT_ACCESS.AUTHORIZED.
Consistency Claim with Security Requirements in PP
Table 2-3 shows the SFR demanded in the PP and the SFR stipulated in this ST.
Table 2-3 SFR Relationship
SFR demanded in PP SFR stipulated in this ST
FAU_GEN.1 FAU_GEN.1
FAU_GEN.2 FAU_GEN.2
FAU_SAR.1
FAU_SAR.2
FAU_STG.1
FAU_STG.4
FDP_ACC.1(a) FDP_ACC.1(a)
FDP_ACC.1(b) FDP_ACC.1(b)
FDP_ACF.1(a) FDP_ACF.1(a)
FDP_ACF.1(b) FDP_ACF.1(b)
FDP_RIP.1 FDP_RIP.1
FIA_AFL.1
FIA_ATD.1 FIA_ATD.1
FIA_SOS.1
FIA_UAU.1 FIA_UAU.1
FIA_UAU.7
FIA_UID.1 FIA_UID.1
FIA_USB.1 FIA_USB.1
FMT_MSA.1(a) FMT_MSA.1(a)
FMT_MSA.1(b) FMT_MSA.1(b)
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
18
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FMT_MSA.3(a) FMT_MSA.3(a)
FMT_MSA.3(b) FMT_MSA.3(b)
FMT_MTD.1 FMT_MTD.1
FMT_SMF.1 FMT_SMF.1
FMT_SMR.1 FMT_SMR.1
FPT_FDI_EXP.1 FPT_FDI_EXP.1
FPT_STM.1 FPT_STM.1
FPT_TST.1 FPT_TST.1
FTA_SSL.3 FTA_SSL.3
FTP_ITC.1 FTP_ITC.1
Having conformed with all SFR demanded in the PP, this ST adds several additional SFR. And with the exception
of FDP_ACF.1.3(b), all SFR in the PP are completely the same as the SFR stipulated in the ST. In
FDP_ACF.1.3(b) in the PP, administrator permissions can be used to permit the user performing operations to
operate all TOE functions, whereas this ST places restrictions on some print functions. As such,
FDP_ACF.1.3(b) in this ST is more restrictive than FDP_ACF.1.3(b) in the PP.
The PP also defines the modify and delete operations on D.FUNC in the Common Access Control SFP. However,
in this TOE, the modify operation is not permitted for D.FUNC. This is a more restricted access control than the
PP.
As such, as this ST is equivalent to or more restrictive than the PP, it is demonstrably compliant with the PP.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
19
©SEIKO EPSON CORPORATION 2020. All rights reserved.
3. Security Problem Definition
This section describes Protected assets, Threats, Organizational Security Policies and Assumptions.
3.1. Protected Assets
Protected assets refer to user data, TSF data, and functions.
(1) User Data
User data refers to data that is created by the user and does not have any impact on TOE security functions. It
is divided into the following two categories.
Table 3-1 User Data
Name Definition in PP
D.DOC User Document Data consist of the information contained in a user’s document. This includes the
original document itself in either hardcopy or electronic form, image data, or residually stored data
created by the hardcopy device while processing an original document and printed hardcopy
output.
D.FUNC User Function Data are the information about a user’s document or job to be processed by the
TOE.
(2) TSF Data
TSF data refers to data that has an impact on TOE security functions. It is divided into the following two
categories.
Table 3-2 TSF Data
Name Definition in PP
D.PROT TSF Protected Data are assets for which alteration by a User who is neither an Administrator nor
the owner of the data would have an effect on the operational security of the TOE, but for which
disclosure is acceptable.
D.CONF TSF Confidential Data are assets for which either disclosure or alteration by a User who is neither
an Administrator nor the owner of the data would have an effect on the operational security of the
TOE.
Table 3-3 shows the TSF data in the scope of this TOE.
Table 3-3 TSF Data in the Scope of this TOE
Name TSF data in this ST Details
D.PROT User ID of normal users U.NORMAL identification information
Administrator user ID U.ADMINISTRATOR identification information
The identifier “Administrator” is assigned
List of recipients for
scan/fax/email or address
Address book
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
20
©SEIKO EPSON CORPORATION 2020. All rights reserved.
book
Job status log Job history
Password policy Settings information concerning password character types and
number of digits
Non-operation timer setting Time information for automatic ending of logon session from
operation panel
Administrator authentication
settings (operation panel)
Settings information to activate/disable administrator
authentication from the operation panel
User restriction settings Information for settings that can be configured from Web Config
(inc. Available Function List)
IPsec settings Settings information concerning IPsec
Time settings Time settings information
Network settings Network settings information
Hash value for verifying
integrity of firmware
Hash value calculated from the firmware file
Stored in TOE
D.CONF Normal user passwords U.NORMAL authentication information
Administrator password U.ADMINISTRATOR authentication information
Passwords to access
external devices such as a
mail server or file server
Password to access a mail server
Password to access a file server
Audit log Log information generated by the monitoring log function
IPsec preshared key Cryptographic key required for key exchange in IPsec
(3) Functions
Functions refers to the function in Table 2-1.
3.2. Threats agents
This security problem definition addresses threats posed by four categories of threat agents:
a) Persons who are not permitted to use the TOE who may attempt to use the TOE.
b) Persons who are authorized to use the TOE who may attempt to use TOE functions for which they are not
authorized.
c) Persons who are authorized to use the TOE who may attempt to access data in ways for which they are
not authorized.
d) Persons who unintentionally cause a software malfunction that may expose the TOE to unanticipated
threats.
The threats and policies defined in this Security Target address the threats posed by these threat agents.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
21
©SEIKO EPSON CORPORATION 2020. All rights reserved.
3.3. Threats to TOE Assets
This section describes threats to assets described in 3.1.
Table 3-4 Threats to User Data for the TOE
Threat Affected asset Description
T.DOC.DIS D.DOC User Document Data may be disclosed to unauthorized persons
T.DOC.ALT D.DOC User Document Data may be altered by unauthorized persons
T.FUNC.ALT D.FUNC User Function Data may be altered by unauthorized persons
Table 3-5 Threats to TSF Data for the TOE
Threat Affected asset Description
T.PROT.ALT D.PROT TSF Protected Data may be altered by unauthorized persons
T.CONF.DIS D.CONF TSF Confidential Data may be disclosed to unauthorized persons
T.CONF.ALT D.CONF TSF Confidential Data may be altered by unauthorized persons
3.4. Organizational Security Policies for the TOE
This section describes the Organizational Security Policies (OSPs) that apply to the TOE. OSPs are used to
provide a basis for Security Objectives that are commonly desired by TOE Owners in this operational
environment but for which it is not practical to universally define the assets being protected or the threats to
those assets.
Table 3-6 Organizational Security Policies for the TOE
Name Definition
P.USER.AUTHORIZATION To preserve operational accountability and security, Users will be
authorized to use the TOE only as permitted by the TOE Owner.
P.SOFTWARE.VERIFICATION To detect corruption of the executable code in the TSF, procedures will
exist to self-verify executable code in the TSF.
P.AUDT.LOGGING To preserve operational accountability and security, records that provide
an audit trail of TOE use and security-relevant events will be created,
maintained, and protected from unauthorized disclosure or alteration, and
will be reviewed by authorized personnel.
P.INTERFACE.MANAGEMENT To prevent unauthorized use of the external interfaces of the TOE,
operation of those interfaces will be controlled by the TOE and its IT
environment.
3.5. Assumptions
The Security Objectives and Security Functional Requirements defined in subsequent sections of this Security
Target are based on the condition that all of the assumptions described in this section are satisfied.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
22
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 3-7 Assumptions for the TOE
Assumption Definition
A.ACCESS.MANAGED The TOE is located in a restricted or monitored environment that provides
protection from unmanaged access to the physical components and data
interfaces of the TOE.
A.USER.TRAINING TOE Users are aware of the security policies and procedures of their organization
and are trained and competent to follow those policies and procedures.
A.ADMIN.TRAINING Administrators are aware of the security policies and procedures of their
organization, are trained and competent to follow the manufacturer’s guidance
and documentation, and correctly configure and operate the TOE in accordance
with those policies and procedures.
A.ADMIN.TRUST Administrators do not use their privileged access rights for malicious purposes.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
23
©SEIKO EPSON CORPORATION 2020. All rights reserved.
4. Security Objectives
This section describes Security Objectives for TOE, Security Objectives of Operational Environment and
Security Objectives Rationale.
4.1. Security Objectives for the TOE
This section describes the Security Objectives that the TOE shall fulfill.
Table 4-1 Security Objectives for the TOE
Objective Definition
O.DOC.NO_DIS The TOE shall protect User Document Data from unauthorized
disclosure.
O.DOC.NO_ALT The TOE shall protect User Document Data from unauthorized
alteration.
O.FUNC.NO_ALT The TOE shall protect User Function Data from unauthorized
alteration.
O.PROT.NO_ALT The TOE shall protect TSF Protected Data from unauthorized
alteration.
O.CONF.NO_DIS The TOE shall protect TSF Confidential Data from unauthorized
disclosure.
O.CONF.NO_ALT The TOE shall protect TSF Confidential Data from unauthorized
alteration.
O.USER.AUTHORIZED The TOE shall require identification and authentication of Users and
shall ensure that Users are authorized in accordance with security
policies before allowing them to use the TOE.
O.INTERFACE.MANAGED The TOE shall manage the operation of external interfaces in
accordance with security policies.
O.SOFTWARE.VERIFIED The TOE shall provide procedures to self-verify executable code in
the TSF.
O.AUDIT.LOGGED The TOE shall create and maintain a log of TOE use and security-
relevant events and prevent its unauthorized disclosure or alteration.
O.AUDIT_STORAGE.PROTECTED The TOE shall ensure that audit records are protected from
unauthorized access, deletion and modifications.
O.AUDIT_ACCESS.AUTHORIZED The TOE shall ensure that audit records can be accessed in order to
detect potential security violations, and only by authorized persons.
4.2. Security Objectives for the IT environment
This section describes the Security Objectives that must be fulfilled by IT methods in the IT environment of the
TOE.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
24
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 4-2 Security Objectives for the IT Environment
Objective Definition
OE.INTERFACE.MANAGED The IT environment shall provide protection from unmanaged access
to TOE external interfaces.
4.3. Security Objectives for the non-IT environment
This section describes the Security Objectives that must be fulfilled by non-IT methods in the non-IT
environment of the TOE.
Table 4-3 Security Objectives for the Non-IT Environment
Objective Definition
OE.PHISICAL.MANAGED The TOE shall be placed in a secure or monitored area that provides
protection from unmanaged physical access to the TOE.
OE.USER.AUTHORIZED The TOE Owner shall grant permission to Users to be authorized to use the
TOE according to the security policies and procedures of their organization.
OE.USER.TRAINED The TOE Owner shall ensure that Users are aware of the security policies and
procedures of their organization and have the training and competence to
follow those policies and procedures.
OE.ADMIN.TRAINED The TOE Owner shall ensure that TOE Administrators are aware of the
security policies and procedures of their organization; have the training,
competence, and time to follow the manufacturer’s guidance and
documentation; and correctly configure and operate the TOE in accordance
with those policies and procedures.
OE.ADMIN.TRUSTED The TOE Owner shall establish trust that TOE Administrators will not use their
privileged access rights for malicious purposes.
OE.AUDIT.REVIEWED The TOE Owner shall ensure that audit logs are reviewed at appropriate
intervals for security violations or unusual patterns of activity.
4.4. Security Objectives rationale
This section demonstrates that each threat, organizational security policy, and assumption are mitigated by at
least one security objective for the TOE, and that those Security Objectives counter the threats, enforce the
policies, and uphold the assumptions.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
25
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 4-4 Completeness of Security Objectives
O.DOC.NO
DIS
O.DOC.NO
ALT
O.FUNC.NO
ALT
O.PROT.NO
ALT
O.CONF.NO
DIS
O.CONF.NO
ALT
O.USER.AUTHORIZED
O.INTERFACE.MANAGED
O.SOFTWARE.VERIFIED
O.AUDIT.LOGGED
O.
AUDIT
STORAGE.PROTECTED
O.
AUDIT
ACCESS.AUTHORIZED
OE.INTERFACE.MANAGED
OE.PHYSICAL.MANAGED
OE.USER.AUTHORIZED
OE.USER.TRAINED
OE.ADMIN.TRAINED
OE.ADMIN.TRUSTED
OE.AUDIT.REVIEWED
T.DOC.DIS ✓ ✓ ✓
T.DOC.ALT ✓ ✓ ✓
T.FUNC.ALT ✓ ✓ ✓
T.PROT.ALT ✓ ✓ ✓
T.CONF.DIS ✓ ✓ ✓
T.CONF.ALT ✓ ✓ ✓
P.USER.AUTHORIZATION ✓ ✓
P.SOFTWARE.VERIFICATION ✓
P.AUDIT.LOGGING ✓ ✓ ✓ ✓
P.INTERFACE.MANAGEMENT ✓ ✓
A.ACCESS.MANAGED ✓
A.USER.TRAINING ✓
A.ADMIN.TRAINING ✓
A.ADMIN.TRUST ✓
Table 4-5 Sufficiency of Security Objectives
Threats. policies, and
assumptions
Summary Objectives and rationale
T.DOC.DIS User Document Data may be
disclosed to unauthorized
persons.
O.DOC.NO_DIS protects D.DOC from
unauthorized disclosure.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization.
OE.USER.AUTHORIZED establishes
responsibility of the TOE Owner to
appropriately grant authorization.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
26
©SEIKO EPSON CORPORATION 2020. All rights reserved.
T.DOC.ALT User Document Data may be
altered by unauthorized
persons.
O.DOC.NO_ALT protects D.DOC from
unauthorized alteration.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization.
OE.USER.AUTHORIZED establishes
responsibility of the TOE Owner to
appropriately grant authorization.
T.FUNC.ALT User Function Data may be
altered by unauthorized
persons.
O.FUNC.NO_ALT protects D.FUNC from
unauthorized alteration.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization.
OE.USER.AUTHORIZED establishes
responsibility of the TOE Owner to
appropriately grant authorization.
T.PROT.ALT TSF Protected Data may be
altered by unauthorized
persons.
O.PROT.NO_ALT protects D.PROT from
unauthorized alteration.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization.
OE.USER.AUTHORIZED establishes
responsibility of the TOE Owner to
appropriately grant authorization.
T.CONF.DIS TSF Confidential Data may be
disclosed to unauthorized
persons.
O.CONF.NO_DIS protects D.CONF from
unauthorized disclosure.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization.
OE.USER.AUTHORIZED establishes
responsibility of the TOE Owner to
appropriately grant authorization.
T.CONF.ALT TSF Confidential Data may be
altered by unauthorized
persons.
O.CONF.NO_ALT protects D.CONF from
unauthorized alteration.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization.
OE.USER.AUTHORIZED establishes
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
27
©SEIKO EPSON CORPORATION 2020. All rights reserved.
responsibility of the TOE Owner to
appropriately grant authorization.
P.USER.AUTHORIZATION Users will be authorized to use
the TOE.
O.USER.AUTHORIZED establishes user
identification and authentication as the
basis for authorization to use the TOE.
OE.USER.AUTHORIZED establishes
responsibility of the TOE Owner to
appropriately grant authorization.
P.SOFTWARE.VERIFICATION Procedures will exist to
selfverify executable code in
the TSF.
O.SOFTWARE.VERIFIED provides
procedures to self-verify executable code
in the TSF.
P.AUDIT.LOGGING An audit trail of TOE use and
security-relevant events will be
created, maintained, protected,
and reviewed.
O.AUDIT.LOGGED creates and maintains
a log of TOE use and security-relevant
events and prevents unauthorized
disclosure or alteration.
O.AUDIT_STORAGE.PROTECTED
protects audit records from unauthorized
access, deletion and modifications.
O.AUDIT_ACCESS.AUTHORIZED
provides appropriate access to audit
records only by authorized persons.
OE.AUDIT.REVIEWED establishes
responsibility of the TOE Owner to ensure
that audit logs are appropriately reviewed.
P.INTERFACE.MANAGEMENT Operation of external
interfaces will be controlled
by the TOE and its IT
environment.
O.INTERFACE.MANAGED manages the
operation of external interfaces in
accordance with security policies.
OE.INTERFACE.MANAGED establishes
a protected environment for TOE external
interfaces.
A.ACCESS.MANAGED The TOE environment
provides protection from
unmanaged access to the
physical components and data
interfaces of the TOE.
OE.PHYSICAL.MANAGED establishes a
protected physical environment for the
TOE.
A.USER.TRAINING Administrators are aware of
and trained to follow security
policies and procedures.
OE.USER.TRAINED establishes
responsibility of the TOE Owner to provide
appropriate User training.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
28
©SEIKO EPSON CORPORATION 2020. All rights reserved.
A.ADMIN.TRAINING TOE Users are aware of and
trained to follow security
policies and procedures.
OE.ADMIN.TRAINED establishes
responsibility of the TOE Owner to provide
appropriate Administrator training.
A.ADMIN.TRUST Administrators do not use their
privileged access rights for
malicious purposes.
OE.ADMIN.TRUSTED establishes
responsibility of the TOE Owner to have a
trusted relationship with Administrators.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
29
©SEIKO EPSON CORPORATION 2020. All rights reserved.
5. Extended components definition
This Security Target defines components that are extensions to Common Criteria 3.1 Revision 2, Part 2. These
extended components are defined in the Security Target but are used in SFR Packages and, therefore, are
employed only in TOEs whose STs conform to those SFR Packages.
5.1. FPT_FDI_EXP Restricted forwarding of data to external interfaces
Family behavior:
This family defines requirements for the TSF to restrict direct forwarding of information from one external
interface to another external interface.
Many products receive information on specific external interfaces and are intended to transform and process
this information before it is transmitted on another external interface. However, some products may provide the
capability for attackers to misuse external interfaces to violate the security of the TOE or devices that are
connected to the TOE’s external interfaces. Therefore, direct forwarding of unprocessed data between different
external interfaces is forbidden unless explicitly allowed by an authorized administrative role. The family
FPT_FDI_EXP has been defined to specify this kind of functionality.
Component leveling:
FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces provides for the functionality to require TSF
controlled processing of data received over defined external interfaces before these data are sent out on another
external interface. Direct forwarding of data from one external interface to another one requires explicit
allowance by an authorized administrative role.
Management: FPT_FDI_EXP.1
The following actions could be considered for the management functions in FMT:
a) Definition of the role(s) that are allowed to perform the management activities
b) Management of the conditions under which direct forwarding can be allowed by an administrative role
c) Revocation of such an allowance
Audit: FPT_FDI_EXP.1
The following actions should be auditable if FAU_GEN Security Audit Data Generation is included in the PP/ST:
There are no auditable events foreseen.
Rationale:
Quite often, a TOE is supposed to perform specific checks and process data received on one external interface
before such (processed) data are allowed to be transferred to another external interface. Examples are firewall
1
FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
30
©SEIKO EPSON CORPORATION 2020. All rights reserved.
systems but also other systems that require a specific work flow for the incoming data before it can be
transferred. Direct forwarding of such data (i.e., without processing the data first) between different external
interfaces is therefore a function that—if allowed at all—can only be allowed by an authorized role.
It has been viewed as useful to have this functionality as a single component that allows specifying the property
to disallow direct forwarding and require that only an authorized role can allow this. Since this is a function that
is quite common for a number of products, it has been viewed as useful to define an extended component.
The Common Criteria defines attribute-based control of user data flow in its FDP class. However, in this Security
Target, the authors needed to express the control of both user data and TSF data flow using administrative
control instead of attribute-based control. It was found that using FDP_IFF and FDP_IFC for this purpose
resulted in SFRs that were either too implementation-specific for a Security Target or too unwieldy for refinement
in a Security Target. Therefore, the authors decided to define an extended component to address this
functionality.
This extended component protects both user data and TSF data, and it could therefore be placed in either the
FDP or the FPT class. Since its purpose is to protect the TOE from misuse, the authors believed that it was
most appropriate to place it in the FPT class. It did not fit well in any of the existing families in either class, and
this led the authors to define a new family with just one member.
FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces
Hierarchical to: No other components
Dependencies: FMT_SMF.1 Specification of Management Functions
FMT_SMR.1 Security roles
FPT_FDI_EXP.1.1 The TSF shall provide the capability to restrict data received on [assignment: list of
external interfaces] from being forwarded without further processing by the TSF to
[assignment: list of external interfaces].
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
31
©SEIKO EPSON CORPORATION 2020. All rights reserved.
6. Security Requirements
This section describes Security Functional Requirements, Security Assurance Requirements and Security
Requirements Rationale.
6.1. Security Functional Requirements
This section describes the operation results for security function requirements.
Class FAU: Security audit
FAU_GEN.1 Audit data generation
Hierarchical to: No other components
Dependencies: FPT_STM.1 Reliable time stamps
FAU_GEN.1.1 The TSF shall be able to generate an audit record of the following auditable events:
‒ Start-up and shutdown of the audit functions;
‒ All auditable events for the [selection, choose one of: minimum, basic, detailed, not specified]
level of audit; and
‒ all Auditable Events as each is defined for its Audit Level (if one is specified) for the
Relevant SFR in Table 6-1; [assignment: other specifically defined auditable events]
[selection, choose one of: minimum, basic, detailed, not specified]
‒ not specified
[assignment: other specifically defined auditable events]
‒ None
Table 6-1 Auditable Events
Auditable Event Relevant SFR Audit level
Additional
information
Details
Use of authentication
mechanism fail
Use of authentication
mechanism success
FIA_UAU.1 Basic None Logon operation fail
Logon operation success
Use of identification
mechanism fail
Use of identification
mechanism success
FIA_UID.1 Basic User identification
test
(if applicable)
Logon operation fail (inc.
user identification
information)
Logon operation success
Use of management
functions
FMT_SMF.1 Minimum None Management function
(see Table 6-11) record
Modification of user group
that plays a partial role
FMT_SMR.1 Minimum None No modification so no
records
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
32
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Change of time FPT_STM.1 Minimum None Change of time
Failure of communication
with trusted channel
FTP_ITC.1 Minimum Communication
recipient IP
address
IPsec communication fail
FAU_GEN.1.2 The TSF shall record within each audit record at least the following information:
‒ Date and time of the event, type of event, subject identity (if applicable), and the outcome
(success or failure) of the event; and
‒ For each audit event type, based on the auditable event definitions of the functional components
included in the PP/ST, for each Relevant SFR listed in Table 6-1: (1) the information as
defined by its Audit Level (if one is specified), and (2) all Additional Information (if any is
required); [assignment: other audit relevant information]
[assignment: other audit relevant information]
‒ None
FAU_GEN.2 User identity association
Hierarchical to: No other components
Dependencies: FAU_GEN.1 Audit data generation
FIA_UID.1 Timing of identification
FAU_GEN.2.1 For audit events resulting from actions of identified users, the TSF shall be able to associate each
auditable event with the identity of the user that caused the event.
FAU_SAR.1 Audit review
Hierarchical to: No other components
Dependencies: FAU_GEN.1 Audit data generation
FAU_SAR.1.1 The TSF shall provide [assignment: authorised users] with the capability to read [assignment: list of
audit information] from the audit records.
[assignment: authorised users]
‒ Administrator
[assignment: list of audit information]
‒ Table 6-1 shows auditable events
FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for the user to interpret the information.
FAU_SAR.2 Restricted audit review
Hierarchical to: No other components
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
33
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Dependencies: FAU_SAR.1 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.
FAU_STG.1 Protected audit trail storage
Hierarchical to: No other components
Dependencies: FAU_GEN.1 Audit data generation
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 [selection, choose one of: prevent, detect] unauthorized modifications to the
stored audit records in the audit trail.
[selection, choose one of: prevent, detect]
‒ prevent
FAU_STG.4 Prevention of audit data loss
Hierarchical to: FAU_STG.3 Action in case of possible audit data loss
Dependencies: FAU_STG.1 Protected audit trail storage
FAU_STG.4.1 The TSF shall [selection, choose one of: “ignore audited events”, “prevent audited events, except
those taken by the authorised user with special rights”, “overwrite the oldest stored audit records”]
and [assignment: other actions to be taken in case of audit storage failure] if the audit trail is full.
[selection, choose one of: “ignore audited events”, “prevent audited events, except those taken by the
authorised user with special rights”, “overwrite the oldest stored audit records”]
‒ overwrite the oldest stored audit records
[assignment: other actions to be taken in case of audit storage failure]
‒ None
Class FDP: User data protection
FDP_ACC.1(a) Subset access control
Hierarchical to: No other components
Dependencies: FDP_ACF.1 Security attribute based access control
FDP_ACC.1.1(a) The TSF shall enforce the CommonAccess Control SFPin Table 6-2 on the list of users as subjects,
objects, and operations among subjects and objects covered by the Common Access Control SFP
in Table 6-2.
FDP_ACC.1(b) Subset access control
Hierarchical to: No other components
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
34
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Dependencies: FDP_ACF.1 Security attribute based access control
FDP_ACC.1.1(b) The TSF shall enforce the TOE Function Access Control SFP in Table 6-3 on users as subjects,
TOE functions as objects, and the right to use the functions as operations.
FDP_ACF.1(a) Security attribute based access control
Hierarchical to: No other components
Dependencies: FDP_ACC.1 Subset access control
FMT_MSA.3 Static attribute initialisation
FDP_ACF.1.1(a) The TSF shall enforce the Common Access Control SFP in Table 6-2 to objects based on the
following: the list of users as subjects and objects controlled under the Common Access Control
SFP in Table 6-2, and for each, the indicated security attributes in Table 6-2.
FDP_ACF.1.2(a) The TSF shall enforce the following rules to determine if an operation among controlled subjects and
controlled objects is allowed: rules specified in the Common Access Control SFP in Table 6-2
governing access among controlled users as subjects and controlled objects using controlled
operations on controlled objects.
Table 6-2 Rules Controlling Operations between Controlled Subjects and Objects
Object
Document data
attributes
Operation Subject Rules Controlling Operation
D.DOC +PRT
+SCN
+CPY
+FAXOUT
+DSR
Delete
Read
U.NORMAL Denied, except for his/her own
documents
Documents are owned by the
U.NORMAL that created the
document
+FAXIN Delete
Read
U.NORMAL Denied, except for his/her own
documents
Received fax documents are owned
by the U.NORMAL assigned by the
“Fax Receiving Function (FAXIN)”
in the Available Function List
D.FUNC +PRT
+SCN
+CPY
+FAXOUT
+DSR
Delete U.NORMAL Denied, except for his/her own
documents
Documents are owned by the
U.NORMAL that created the
document
Modify U.NORMAL Denied
+FAXIN Delete U.NORMAL Denied, except for his/her own
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
35
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FDP_ACF.1.3(a) The TSF shall explicitly authorise access of subjects to objects based on the following additional rules:
[assignment: rules, based on security attributes, that explicitly authorize access of subjects to objects].
[assignment: rules, based on security attributes, that explicitly authorize access of subjects to objects]
‒ For a U.ADMINISTRATOR, the "Delete" operation is permitted for D.DOC with the
document data attribute “+PRT”.
‒ For a U.ADMINISTRATOR, the "Read" and "Delete" operations are permitted for
D.DOC with the document data attributes “+SCN”, “+CPY”, “+FAXIN”, “+FAXOUT”, and
“+DSR”
‒ For a U.ADMINISTRATOR, the "Delete" operation is permitted for D.FUNC with the
document data attributes “+PRT”, “+SCN”, “+CPY”, “+FAXIN”, “+FAXOUT”, and “+DSR”
FDP_ACF.1.4(a) The TSF shall explicitly deny access of subjects to objects based on the [assignment: rules, based on
security attributes, that explicitly deny access of subjects to objects].
[assignment: rules, based on security attributes, that explicitly deny access of subjects to objects]
‒ For a U.ADMINISTRATOR, the "Modify" operation is not permitted for D.FUNC with the
document data attributes “+PRT”, “+SCN”, “+CPY”, “+FAXIN”, “+FAXOUT”, and “+DSR”
FDP_ACF.1(b) Security attribute based access control
Hierarchical to: No other components
Dependencies: FDP_ACC.1 Subset access control
FMT_MSA.3 Static attribute initialisation
FDP_ACF.1.1(b) The TSF shall enforce the TOE Function Access Control SFP to objects based on the following:
users and [assignment: list of TOE functions and the security attribute(s) used to determine the
TOE Function Access Control SFP].
[assignment: list of TOE functions and the security attribute(s) used to determine the TOE
Function Access Control SFP]
‒ See Table 6-3
FDP_ACF.1.2(b) The TSF shall enforce the following rules to determine if an operation among controlled subjects and
documents
Received fax documents are owned
by the U.NORMAL assigned by the
“Fax Receiving Function (FAXIN)” in
the Available Function List
Modify U.NORMAL Denied
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
36
©SEIKO EPSON CORPORATION 2020. All rights reserved.
controlled objects is allowed: [selection: the user is explicitly authorized by U.ADMINISTATOR to
use a function, a user that is authorized to use the TOE is automatically authorized to use the
functions [assignment: list of functions], [assignment: other conditions]].
[selection: the user is explicitly authorized by U.ADMINISTATOR to use a function, a user that is
authorized to use the TOE is automatically authorized to use the functions [assignment: list of
functions], [assignment: other conditions]]
‒ [assignment: other conditions]
[assignment: other conditions]
‒ See Table 6-3
Table 6-3 Rules Controlling Operations between Controlled Subjects and Objects
FDP_ACF.1.3(b) The TSF shall explicitly authorise access of subjects to objects based on the following additional rules:
Object Operation Subject
Security
Attribute
Rules Controlling Operation
F.PRT Job execution
Job deletion
U.NORMAL Available
Function List
(PRT)
For subjects to which the print
function (PRT) is assigned in the
Available Function List, operation is
permitted
F.SCN Job execution
Job deletion
U.NORMAL Available
Function List
(SCN)
For subjects to which the scan
function (SCN) is assigned in the
Available Function List, operation is
permitted
F.CPY Job execution
Job deletion
U.NORMAL Available
Function List
(CPY)
For subjects to which the copy
function (CPY) is assigned in the
Available Function List, operation is
permitted
F.FAX Job execution
Job deletion
U.NORMAL Available
Function List
(FAXIN)
Available
Function List
(FAXOUT)
For subjects to which the fax
receiving function (FAXIN) and fax
sending function (FAXOUT) are
assigned in the Available Function
List, operation is permitted
F.DSR Job execution
Job deletion
U.NORMAL Available
Function List
(DSR)
For subjects to which the document
storage and retrieval function
(DSR) is assigned in the Available
Function List, operation is permitted
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
37
©SEIKO EPSON CORPORATION 2020. All rights reserved.
[assignment: rules, based on security attributes, that explicitly authorize access of subjects to objects].
[assignment: rules, based on security attributes, that explicitly authorise access of subjects to objects]
‒ For a U.ADMINISTRATOR, the "Job deletation" operation is permitted for “F.PRT”
‒ For a U.ADMINISTRATOR, the "Job execution" and "Job deletation" operations are
permitted for “F.SCN”, “F.CPY”, “F.FAX”, and “F.DSR”
FDP_ACF.1.4(b) The TSF shall explicitly deny access of subjects to objects based on the [assignment: rules, based on
security attributes, that explicitly deny access of subjects to objects].
[assignment: rules, based on security attributes, that explicitly deny access of subjects to objects]
‒ None
FDP_RIP.1 Subset residual information protection
Hierarchical to: No other components
Dependencies: No dependencies
FDP_RIP.1.1 The TSF shall ensure that any previous information content of a resource is made unavailable upon
the [selection: allocation of the resource to, deallocation of the resource from] the following objects:
D.DOC, [assignment: list of objects].
[selection: allocation of the resource to, deallocation of the resource from]
‒ deallocation of the resource from
[assignment: list of objects]
‒ None
Class FIA: Identification and authentication
FIA_AFL.1 Authentication failure handling
Hierarchical to: No other components
Dependencies: FIA_UAU.1 Timing of authentication
FIA_AFL.1.1 The TSF shall detect when [selection: [assignment: positive integer number], an administrator
configurable positive integer within [assignment: range of acceptable values]] unsuccessful
authentication attempts occur related to [assignment: list of authentication events].
[selection: [assignment: positive integer number], an administrator configurable positive integer
within [assignment: range of acceptable values]]
‒ [assignment: positive integer number]
[assignment: positive integer number]
‒ 1
[assignment: list of authentication events]
‒ Logon from the operation panel by an administrator
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
38
©SEIKO EPSON CORPORATION 2020. All rights reserved.
‒ Logon from the operation panel by a normal user
‒ Logon from Web Config by an administrator
‒ Authentication upon receipt of a Password Print Job
FIA_AFL.1.2 When the defined number of unsuccessful authentication attempts has been [selection: met, surpassed],
the TSF shall [assignment: list of actions].
[selection: met, surpassed]
‒ met
[assignment: list of actions]
‒ See Table 6-4
Table 6-4 Action List
Logon Pattern Action upon unsuccessful authentication
Logon from the operation panel by an
administrator
Lock the relevant administrator out for 0.6 seconds
Logon from the operation panel by a normal
user
Lock the relevant normal user out for 0.6 seconds
Logon from Web Config by an administrator Lock the relevant administrator out for 1 second
Authentication upon receipt of a Password
Print Job
Lock the relevant normal user out for 1 second
FIA_ATD.1 User attribute definition
Hierarchical to: No other components
Dependencies: No dependencies
FIA_ATD.1.1 The TSF shall maintain the following list of security attributes belonging to individual users:
[assignment: list of security attributes].
[assignment: list of security attributes]
‒ See Table 6-5
Table 6-5 Security Attribute List
User Security Attribute
U.NORMAL User ID of normal users
User role
Available Function List
U.ADMINISTRATOR User role
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
39
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FIA_SOS.1 Verification of secrets
Hierarchical to: No other components
Dependencies: No dependencies
FIA_SOS.1.1 The TSF shall provide a mechanism to verify that secrets (normal user passwords, administrator
password) meet [assignment: a defined quality metric].
[assignment: a defined quality metric]
‒ Length: 8 characters or more (maximum 20)
‒ Character types: must include at least one of the following character types
• Upper-case letters
• Lower-case letters
• Numbers
• Symbols (!"#$%&'()*+,-./:;<=>?@[¥]^_`{|}~ )
FIA_UAU.1 Timing of authentication
Hierarchical to: No other components
Dependencies: FIA_UID.1 Timing of identification
FIA_UAU.1.1 The TSF shall allow [assignment: list of TSF-mediated actions that do not conflict with access-
controlled Functions of the TOE] on behalf of the user to be performed before the user is
authenticated.
[assignment: list of TSF-mediated actions that do not conflict with access-controlled Functions of
the TOE]
‒ Printer information display on operation panel
‒ Printer information print from operation panel
‒ Network information display on operation panel
‒ Network information print from operation panel
‒ Job list display on operation panel
‒ Help display on operation panel
‒ Printer information display on Web Config
‒ Network information display on Web Config
‒ Fax information display on operation panel
‒ Fax information print from operation panel
‒ Printer maintenance function execution from operation panel
‒ Printer status display on printer driver
FIA_UAU.1.2 The TSF shall require each user to be successfully authenticated before allowing any other TSF-
mediated actions on behalf of that user.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
40
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FIA_UAU.7 Protected authentication feedback
Hierarchical to: No other components
Dependencies: FIA_UAU.1 Timing of authentication
FIA_UAU.7.1 The TSF shall provide only [assignment: list of feedback] to the user while the authentication is in
progress.
[assignment: list of feedback]
‒ See Table 6-6
Table 6-6 Feedback List
Action Feedback
Logon from the operation panel by an
administrator
* characters equaling the number of characters entered
Logon from the operation panel by a normal
user
* characters equaling the number of characters entered
Logon from Web Config by an administrator Mask characters equaling the number of characters entered
*Masked character types depend on the browser
FIA_UID.1 Timing of identification
Hierarchical to: No other components
Dependencies: No dependencies
FIA_UID.1.1 The TSF shall allow [assignment: list of TSF-mediated actions that do not conflict with access-
controlled Functions of the TOE] on behalf of the user to be performed before the user is identified.
[assignment: list of TSF-mediated actions that do not conflict with access-controlled Functions of
the TOE]
‒ Printer information display on operation panel
‒ Printer information print from operation panel
‒ Network information display on operation panel
‒ Network information print from operation panel
‒ Job list display on operation panel
‒ Help display on operation panel
‒ Printer information display on Web Config
‒ Network information display on Web Config
‒ Fax information display on operation panel
‒ Fax information print from operation panel
‒ Printer maintenance function execution from operation panel
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
41
©SEIKO EPSON CORPORATION 2020. All rights reserved.
‒ Printer status display on printer driver
FIA_UID.1.2 The TSF shall require each user to be successfully identified before allowing any other TSF-mediated
actions on behalf of that user.
FIA_USB.1 User-subject binding
Hierarchical to: No other components
Dependencies: FIA_ATD.1 User attribute definition
FIA_USB.1.1 The TSF shall associate the following user security attributes with subjects acting on the behalf of that
user: [assignment: list of user security attributes].
[assignment: list of user security attributes]
‒ See Table 6-5
FIA_USB.1.2 The TSF shall enforce the following rules on the initial association of user security attributes with the
subjects acting on behalf of users: [assignment: rules for the initial association of attributes].
[assignment: rules for the initial association of attributes]
‒ None
FIA_USB.1.3 The TSF shall enforce the following rules governing changes to the user security attributes with the
subjects acting on behalf of users: [assignment: rules for the changing of attributes].
[assignment: rules for the changing of attributes]
‒ None
Class FMT: Security management
FMT_MSA.1(a) Management of security attributes
Hierarchical to: No other components
Dependencies: [FDP_ACC.1 Subset access control, or
FDP_IFC.1 Subset information flow control]
FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MSA.1.1(a) The TSF shall enforce the Common Access Control SFP in Table 6-2, [assignment: access control
SFP(s), information flow control SFP(s)] to restrict the ability to [selection: change_default, query,
modify, delete, [assignment: other operations]] the security attributes [assignment: list of security
attributes] to [assignment: the authorized identified roles].
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
42
©SEIKO EPSON CORPORATION 2020. All rights reserved.
[assignment: access control SFP(s), information flow control SFP(s)]
‒ None
[selection: change_default, query, modify, delete, [assignment: other operations]]
‒ See Table 6-7
‒ [assignment: other operations]
[assignment: other operations]
‒ See Table 6-7
[assignment: list of security attributes]
‒ See Table 6-7
[assignment: the authorized identified roles]
‒ See Table 6-7
Table 6-7 Security Attributes, Operations, and User Roles for which Operations are Permitted
Security Attribute Operation
User role for which
operation is permitted
User ID of normal users [Selected operations] delete U.ADMINISTRATOR
[Added operations] Newly create
User role [Selected operations] modify Nobody
Available Function List [Selected operations] modify U.ADMINISTRATOR
Document data attributes [Selected operations] modify Nobody
FMT_MSA.1(b) Management of security attributes
Hierarchical to: No other components
Dependencies: [FDP_ACC.1 Subset access control, or
FDP_IFC.1 Subset information flow control]
FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MSA.1.1(b) The TSF shall enforce the TOE Function Access Control SFP in Table 6-3, [assignment: access
control SFP(s), information flow control SFP(s)] to restrict the ability to [selection: change_default,
query, modify, delete, [assignment: other operations]] the security attributes [assignment: list of
security attributes] to [assignment: the authorised identified roles].
[assignment: access control SFP(s), information flow control SFP(s)]
‒ None
[selection: change_default, query, modify, delete, [assignment: other operations]]
‒ See Table 6-8
[assignment: list of security attributes]
‒ See Table 6-8
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
43
©SEIKO EPSON CORPORATION 2020. All rights reserved.
[assignment: the authorised identified roles]
‒ See Table 6-8
Table 6-8 Security Attributes, Operations, and User Roles for which Operations are Permitted
Security Attribute Operation
User role for which
operation is permitted
User role [Selected operations] modify Nobody
Available Function List [Selected operations] modify U.ADMINISTRATOR
Function type [Selected operations] modify Nobody
FMT_MSA.3(a) Static attribute initialisation
Hierarchical to: No other components
Dependencies: FMT_MSA.1 Management of security attributes
FMT_SMR.1 Security roles
FMT_MSA.3.1(a) The TSF shall enforce the Common Access Control SFP in Table 6-2, [assignment: access control
SFP, information flow control SFP] to provide [selection, choose one of: restrictive, permissive,
[assignment: other property]] default values for security attributes that are used to enforce the SFP.
[assignment: access control SFP, information flow control SFP]
‒ None
[selection, choose one of: restrictive, permissive, [assignment: other property]]
‒ restrictive
FMT_MSA.3.2(a) The TSF shall allow the [assignment: the authorized identified roles] to specify alternative initial
values to override the default values when an object or information is created.
[assignment: the authorized identified roles]
‒ nobody
FMT_MSA.3(b) Static attribute initialisation
Hierarchical to: No other components
Dependencies: FMT_MSA.1 Management of security attributes
FMT_SMR.1 Security roles
FMT_MSA.3.1(b) The TSF shall enforce the TOE Function Access Control Policy in Table 6-3, [assignment: access
control SFP, information flow control SFP] to provide [selection, choose one of: restrictive, permissive,
[assignment: other property]] default values for security attributes that are used to enforce the SFP.
[assignment: access control SFP, information flow control SFP]
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
44
©SEIKO EPSON CORPORATION 2020. All rights reserved.
‒ None
[selection, choose one of: restrictive, permissive, [assignment: other property]]
‒ restrictive
FMT_MSA.3.2(b) The TSF shall allow the [assignment: the authorized identified roles] to specify alternative initial
values to override the default values when an object or information is created.
[assignment: the authorized identified roles]
‒ nobody
FMT_MTD.1 Management of TSF Data
Hierarchical to: No other components
Dependencies: FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MTD.1.1(a) The TSF shall restrict the ability to [selection: change_default, query, modify, delete, clear,
[assignment: other operations]] the [assignment: list of TSF Data] to [selection, choose one of:
Nobody, [selection: U.ADMINISTRATOR, [assignment: the authorized identified roles except
U.NORMAL]]].
[selection: change_default, query, modify, delete, clear, [assignment: other operations]]
‒ See Table 6-9
‒ [assignment: other operations]
[assignment: other operations]
‒ See Table 6-9
[assignment: list of TSF Data]
‒ See Table 6-9
[selection, choose one of: Nobody, [selection: U.ADMINISTRATOR, [assignment: the authorized
identified roles except U.NORMAL]]]
‒ See Table 6-9
Table 6-9 Management of TSF Data
Category TSF data Operation
User role for which
operation is permitted
D.PROT Administrator user ID [Selected operations] modify Nobody
Password policy [Selected operations] modify U.ADMINISTRATOR
Non-operation timer
setting
[Selected operations] modify
U.ADMINISTRATOR
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
45
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Administrator
authentication settings
(operation panel)
[Selected operations] modify
U.ADMINISTRATOR
User restriction
settings
[Selected operations] modify
U.ADMINISTRATOR
IPsec settings [Selected operations] modify U.ADMINISTRATOR
Time settings [Selected operations] modify U.ADMINISTRATOR
Network settings [Selected operations] modify U.ADMINISTRATOR
Hash value for
verifying integrity of
firmware
[Selected operations] modify Nobody
D.CONF Administrator
password
[Selected operations] modify U.ADMINISTRATOR
[Selected operations] query Nobody
Passwords to access
external devices such
as a mail server or file
server
[Selected operations] modify U.ADMINISTRATOR
[Added operations] Newly create
[Selected operations] query Nobody
IPsec preshared key [Selected operations] modify U.ADMINISTRATOR
[Selected operations] query Nobody
FMT_MTD.1.1(b) The TSF shall restrict the ability to [selection: change_default, query, modify, delete, clear,
[assignment: other operations]] the [assignment: list of TSF Data associated with a U.NORMAL or
TSF Data associated with documents or jobs owned by a U.NORMAL] to [selection, choose one of:
Nobody, [selection: U.ADMINISTRATOR, the U.NORMAL to whom such TSF Data are
associated]].
[selection: change_default, query, modify, delete, clear, [assignment: other operations]]
‒ See Table 6-10
‒ [assignment: other operations]
[assignment: other operations]
‒ See Table 6-10
[assignment: list of TSF Data associated with a U.NORMAL or TSF Data associated with documents
or jobs owned by a U.NORMAL]
‒ See Table 6-10
[selection, choose one of: Nobody, [selection: U.ADMINISTRATOR, the U.NORMAL to whom
such TSF Data are associated]]
‒ See Table 6-10
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
46
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Table 6-10 Management of TSF Data
Category TSF data Operation
User role for which
operation is permitted
D.PROT User ID of normal
users
[Selected operations] delete U.ADMINISTRATOR
[Added operations] Newly create
List of recipients for
scan/fax/email or
address book
[Selected operations] delete U.ADMINISTRATOR
[Added operations] Newly create
Job status log [Selected operations] modify Nobody
D.CONF Normal user
passwords
[Selected operations] delete U.ADMINISTRATOR
[Added operations] Newly create
[Selected operations] query Nobody
FMT_SMF.1 Specification of Management Functions
Hierarchical to: No other components
Dependencies: No dependencies
FMT_SMF.1.1 The TSF shall be capable of performing the following management functions: [assignment: list of
management functions to be provided by the TSF].
[assignment: list of management functions to be provided by the TSF]
‒ See Table 6-11
Table 6-11 Management Function List
Management Functionality
Registration/deletion of user ID for normal users by U.ADMINISTRATOR
Registration/deletion of list of recipients for scan/fax/email or address book by U.ADMINISTRATOR
Change of password policy by U.ADMINISTRATOR
Change of non-operation timer settings by U.ADMINISTRATOR
Change of administrator authentication settings (operation panel) by U.ADMINISTRATOR
Change of user restriction settings by U.ADMINISTRATOR
Change of IPsec settings by U.ADMINISTRATOR
Change of time settings by U.ADMINISTRATOR
Change of network settings by U.ADMINISTRATOR
Registration/deletion of user password for normal users by U.ADMINISTRATOR
Change of administrator password by U.ADMINISTRATOR
Registration/change of passwords to access external devices such as a mail server or file server by
U.ADMINISTRATOR
Change of IPsec preshared key by U.ADMINISTRATOR
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
47
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FMT_SMR.1 Security roles
Hierarchical to: No other components
Dependencies: FIA_UID.1 Timing of identification
FMT_SMR.1.1 The TSF shall maintain the roles U.ADMINISTRATOR, U.NORMAL, [selection: Nobody,
[assignment: the authorised identified roles]].
[selection: Nobody, [assignment: the authorised identified roles]]
‒ Nobody
FMT_SMR.1.2 The TSF shall be able to associate users with roles, except for the role “Nobody” to which no user
shall be associated.
Class FPT: Protection of the TSF
FPT_FDI_EXP.1 Restricted forwarding of data to external interfaces
Hierarchical to: No other components
Dependencies: FMT_SMF.1 Specification of Management Functions
FMT_SMR.1 Security roles
FPT_FDI_EXP.1.1 The TSF shall provide the capability to restrict data received on any external Interface from being
forwarded without further processing by the TSF to the TSF to any Shared-medium Interface.
FPT_STM.1 Reliable time stamps
Hierarchical to: No other components
Dependencies: No dependencies
FPT_STM.1.1 The TSF shall be able to provide reliable time stamps.
FPT_TST.1 TSF testing
Hierarchical to: No other components
Dependencies: No dependencies
FPT_TST.1.1 The TSF shall run a suite of self tests [selection: during initial start-up, periodically during normal
operation, at the request of the authorised user, at the conditions [assignment: conditions under which
self test should occur]] to demonstrate the correct operation of [selection: [assignment: parts of TSF],
the TSF].
[selection: during initial start-up, periodically during normal operation, at the request of the
authorised user, at the conditions [assignment: conditions under which self test should occur]]
‒ during initial start-up
[selection: [assignment: parts of TSF], the TSF]
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
48
©SEIKO EPSON CORPORATION 2020. All rights reserved.
‒ [assignment: parts of TSF]
[assignment: parts of TSF]
‒ Self-Test Function
FPT_TST.1.2 The TSF shall provide authorised users with the capability to verify the integrity of [selection:
[assignment: parts of TSF], TSF Data].
[selection: [assignment: parts of TSF], TSF Data]
‒ [assignment: parts of TSF]
[assignment: parts of TSF]
‒ Hash value for verifying integrity of firmware
FPT_TST.1.3 The TSF shall provide authorised users with the capability to verify the integrity of stored TSF
executable code.
Class FTA: TOE access
FTA_SSL.3 TSF-initiated termination
Hierarchical to: No other components
Dependencies: No dependencies
FTA_SSL.3.1 The TSF shall terminate an interactive session after a [assignment: time interval of user inactivity].
[assignment: time interval of user inactivity]
‒ See Table 6-12
Table 6-12 User Inactive Time Interval
Action User inactive time interval
Logon from the operation panel by an
administrator
Set time in non-operation timer settings
(can be set by an administrator with a range from 10 seconds
to 240 minutes)
Logon from the operation panel by a normal
user
Set time in non-operation timer settings
(can be set by an administrator with a range from 10 seconds
to 240 minutes)
Logon from Web Config by an administrator 20 minutes
Class FTP: Trusted paths/channels
FTP_ITC.1 Inter-TSF trusted channel
Hierarchical to: No other components
Dependencies: No dependencies
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
49
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FTP_ITC.1.1 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 The TSF shall permit the TSF, another trusted IT product to initiate communication via the trusted
channel.
FTP_ITC.1.3 The TSF shall initiate communication via the trusted channel for communication of D.DOC,
D.FUNC, D.PROT, and D.CONF over any Shared-medium Interface.
6.2. Security Assurance Requirements
Table 6-13 lists the security assurance requirements for 2600.2-PP, Protection Profile for Hardcopy Devices,
Operational Environment B, and related SFR packages, EAL 2 augmented by ALC_FLR.2.
Table 6-13 IEEE 2600.2 Security Assurance Requirements
Assurance class Assurance components
ADV: Development ADV_ARC.1 Security architecture description
ADV_FSP.2 Security-enforcing functional specification
ADV_TDS.1 Basic design
AGD: Guidance documents AGD_OPE.1 Operational user guidance
AGD_PRE.1 Preparative procedures
ALC: Life-cycle support ALC_CMC.2 Use of a CM system
ALC_CMS.2 Parts of the TOE CM coverage
ALC_DEL.1 Delivery procedures
ALC_FLR.2 Flaw reporting procedures (augmentation of EAL 2)
ASE: Security Target evaluation ASE_CCL.1 Conformance claims
ASE_ECD.1 Extended components definition
ASE_INT.1 ST introduction
ASE_OBJ.2 Security objectives
ASE_REQ.2 Derived security requirements
ASE_SPD.1 Security problem definition
ASE_TSS.1 TOE summary specification
ATE: Tests ATE_COV.1 Evidence of coverage
ATE_FUN.1 Functional testing
ATE_IND.2 Independent testing – sample
AVA: Vulnerability assessment AVA_VAN.2 Vulnerability analysis
6.3. Security Requirements Rationale
This section describes the rationale behind security functional requirements, security assurance requirements,
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
50
©SEIKO EPSON CORPORATION 2020. All rights reserved.
and dependency analysis.
Security Functional Requirements rationale
Table 6-14 demonstrate the completeness of SFRs that fulfill the objectives of the TOE. Bold typeface items
provide principal (P) fulfillment of the objectives, and normal typeface items provide supporting (S) fulfillment.
Table 6-14 Completeness of Security Requirements
O.DOC.NO_DIS
O.DOC.NO_ALT
O.FUNC.NO_ALT
O.PROT.NO_ALT
O.CONF.NO_DIS
O.CONF.NO_ALT
O.USER.AUTHORIZED
O.INTERFACE.MANAGED
O.SOFTWARE.VERIFIED
O.AUDIT.LOGGED
O.
AUDIT_STORAGE.PROTECTED
O.
AUDIT_ACCESS.AUTHORIZED
FAU_GEN.1 P
FAU_GEN.2 P
FAU_SAR.1 P P
FAU_SAR.2 P P
FAU_STG.1 P P
FAU_STG.4 P P
FDP_ACC.1(a) P P P
FDP_ACC.1(b) P
FDP_ACF.1(a) S S S
FDP_ACF.1(b) S
FDP_RIP.1 P
FIA_AFL.1 S
FIA_ATD.1 S
FIA_SOS.1 S
FIA_UAU.1 P P
FIA_UAU.7 S
FIA_UID.1 S S S S S S P P S
FIA_USB.1 P
FMT_MSA.1(a) S S S
FMT_MSA.1(b) S
FMT_MSA.3(a) S S S
FMT_MSA.3(b) S
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
51
©SEIKO EPSON CORPORATION 2020. All rights reserved.
FMT_MTD.1 P P P
FMT_SMF.1 S S S S S S
FMT_SMR.1 S S S S S S S
FPT_FDI_EXP.1 P
FPT_STM.1 S
FPT_TST.1 P
FTA_SSL.3 P P
FTP_ITC.1 P P P P P P
Table 6-15 shows the sufficiency of the SFR for achieving TOE objectives.
Table 6-15 Sufficiency of Security Requirements
Objective SFR Aim
O.DOC.NO_DIS
(Protection of D.DOC from
unauthorized disclosure)
FDP_ACC.1(a) Establish access control objectives and
implement protection
FDP_ACF.1(a) Provide access control functions and support
access control objectives
FDP_RIP.1 Make residual data unusable and
implement protection
FIA_UID.1 Demand user identification and support access
control and security roles
FMT_MSA.1(a) Manage security attributes and support access
control functions
FMT_MSA.3(a) Manage default security attributes and support
access control functions
FMT_SMF.1 Demand attribute management functions and
support security attribute management
FMT_SMR.1 Demand security roles and support security
attribute management
FTP_ITC.1 Demand the use of a trusted channel when
communicating on a share media interface,
and implement protection
O.DOC.NO_ALT
(Protection of D.DOC from
unauthorized alteration)
FDP_ACC.1(a) Establish access control objectives and
implement protection
FDP_ACF.1(a) Provide access control functions and support
access control objectives
FIA_UID.1 Demand user identification and support access
control and security roles
FMT_MSA.1(a) Manage security attributes and support access
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
52
©SEIKO EPSON CORPORATION 2020. All rights reserved.
control functions
FMT_MSA.3(a) Manage default security attributes and support
access control functions
FMT_SMF.1 Demand attribute management functions and
support security attribute management
FMT_SMR.1 Demand security roles and support security
attribute management
FTP_ITC.1 Demand the use of a trusted channel when
communicating on a share media interface,
and implement protection
O.FUNC.NO_ALT
(Protection of D.FUNC from
unauthorized alteration)
FDP_ACC.1(a) Establish access control objectives and
implement protection
FDP_ACF.1(b) Provide access control functions and support
access control objectives
FIA_UID.1 Demand user identification and support access
control and security roles
FMT_MSA.1(a) Manage security attributes and support access
control functions
FMT_MSA.3(a) Manage default security attributes and support
access control functions
FMT_SMF.1 Demand attribute management functions and
support security attribute management
FMT_SMR.1 Demand security roles and support security
attribute management
FTP_ITC.1 Demand the use of a trusted channel when
communicating on a share media interface,
and implement protection
O.PROT.NO_ALT
(Protection of D.PROT from
unauthorized alteration)
FIA_UID.1 Demand user identification and support access
control and security roles
FMT_MTD.1 Restrict access and implement protection
FMT_SMF.1 Demand attribute management functions and
support security attribute management
FMT_SMR.1 Demand security roles and support security
attribute management
FTP_ITC.1 Demand the use of a trusted channel when
communicating on a share media interface,
and implement protection
O.CONF.NO_DIS FAU_SAR.1 Provide security audit records and
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
53
©SEIKO EPSON CORPORATION 2020. All rights reserved.
(Protection of D.CONF from
unauthorized disclosure)
implement audit objectives
FAU_SAR.2 Restrict the reading of security audit
records and implement audit objectives
FIA_UID.1 Demand user identification and support access
control and security roles
FMT_MTD.1 Restrict access and implement protection
FMT_SMF.1 Demand attribute management functions and
support security attribute management
FMT_SMR.1 Demand security roles and support security
attribute management
FTP_ITC.1 Demand the use of a trusted channel when
communicating on a share media interface,
and implement protection
O.CONF.NO_ALT
(Protection of D.CONF from
unauthorized alteration)
FAU_STG.1 Protect from unauthorized deletion and
modification, and implement auditing
objectives
FAU_STG.4 Prevent loss of audit data and implement
auditing objectives
FIA_UID.1 Demand user identification and support access
control and security roles
FMT_MTD.1 Restrict access and implement protection
FMT_SMF.1 Demand attribute management functions and
support security attribute management
FMT_SMR.1 Demand security roles and support security
attribute management
FTP_ITC.1 Demand the use of a trusted channel when
communicating on a share media interface,
and implement protection
O.USER.AUTHORIZED
(Granting of permission for use of TOE
to normal users and administrator)
FDP_ACC.1(b) Establish access control objectives and
grant permissions
FDP_ACF.1(b) Provide access control functions and support
access control objectives
FIA_AFL.1 Demand access control and grant permissions
FIA_ATD.1 Link security attributes to users and support
granting of permissions
FIA_SOS.1 Demand confidential specifications and
support granting of permissions
FIA_UAU.1 Demand user authentication and grant
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
54
©SEIKO EPSON CORPORATION 2020. All rights reserved.
permissions
FIA_UAU.7 Demand user authentication and grant
permissions
FIA_UID.1 Demand user identification and grant
permissions
FIA_USB.1 Distinguish security attributes of subject
linked to user role and grant permissions
FMT_MSA.1(b) Manage security attributes and support access
control functions
FMT_MSA.3(b) Manage default security attributes and support
access control functions.
FMT_SMR.1 Demand security roles and support granting of
permissions
FTA_SSL.3 End a suspended session and grant
permissions
O.INTERFACE.MANAGED
(external interface management)
FIA_UAU.1 Demand user authentication and manage
external interface
FIA_UID.1 Demand user authentication and manage
external interface
FPT_FDI_EXP.1 (As needed) demand an administrator to
manage data transfer to a shared media
interface from an external interface and
manage external interface
FTA_SSL.3 End a suspended session and manage
external interface
O.SOFTWARE.VERIFIED
(software integrity verification)
FPT_TST.1 Demand self-test and verify software
O.AUDIT.LOGGED
(record of auditable events)
FAU_GEN.1 Demand logging of relevant events and
implement auditing objectives
FAU_GEN.2 Demand logging of information linked to
auditable events and implement auditing
objectives
FIA_UID.1 Link user identification to events and support
auditing objectives
FPT_STM.1 Demand timestamps linked to events and
support auditing objectives
O. AUDIT_STORAGE.PROTECTED
(Protection of audit data from
FAU_STG.1 Protect from unauthorized deletion and
modification, and implement auditing
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
55
©SEIKO EPSON CORPORATION 2020. All rights reserved.
unauthorized access, deletion, and
modification)
objectives
FAU_STG.4 Prevent loss of audit data and implement
auditing objectives
O. AUDIT_ACCESS.AUTHORIZED
(audit of security audit records)
FAU_SAR.1 Provide security audit records and
implement audit objectives
FAU_SAR.2 Restrict the reading of security audit
records and implement audit objectives
Security Assurance Requirements rationale
This Security Target has been developed for Hardcopy Devices used in restrictive commercial information
processing environments that require a relatively high level of document security, operational accountability,
and information assurance. The TOE environment will be exposed to only a low level of risk because it is
assumed that the TOE will be located in a restricted or monitored environment that provides almost constant
protection from unauthorized and unmanaged access to the TOE and its data interfaces. Agents cannot
physically access any nonvolatile storage without disassembling the TOE except for removable nonvolatile
storage devices, where protection of User and TSF Data are provided when such devices are removed from
the TOE environment. Agents have limited or no means of infiltrating the TOE with code to effect a change, and
the TOE self-verifies its executable code to detect unintentional malfunctions. As such, the Evaluation
Assurance Level 2 is appropriate.
EAL 2 is augmented with ALC_FLR.2, Flaw reporting procedures. ALC_FLR.2 ensures that instructions and
procedures for the reporting and remediation of identified security flaws are in place, and their inclusion is
expected by the consumers of this TOE.
Dependency Analysis
Table 6-16 shows the results of dependency analysis in this ST regarding TOE security function requirements.
Table 6-16 Dependency Analysis Results for TOE Security Function Requirements
Function
requirement
Dependency demanded in CC Dependency relation in this ST
FAU_GEN.1 • FPT_STM.1 • FPT_STM.1
FAU_GEN.2 • FAU_GEN.1
• FIA_UID.1
• FAU_GEN.1
• FIA_UID.1
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.4 • FAU_STG.1 • FAU_STG.1
FDP_ACC.1(a) • FDP_ACF.1 • FDP_ACF.1(a)
FDP_ACC.1(b) • FDP_ACF.1 • FDP_ACF.1(b)
FDP_ACF.1(a) • FDP_ACC.1 • FDP_ACC.1(a)
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
56
©SEIKO EPSON CORPORATION 2020. All rights reserved.
• FMT_MSA.3 • FMT_MSA.3(a)
FDP_ACF.1(b) • FDP_ACC.1
• FMT_MSA.3
• FDP_ACC.1(b)
• FMT_MSA.3(b)
FDP_RIP.1 • None • None
FIA_AFL.1 • FIA_UAU.1 • FIA_UAU.1
FIA_ATD.1 • None • None
FIA_SOS.1 • None • None
FIA_UAU.1 • FIA_UID.1 • FIA_UID.1
FIA_UAU.7 • FIA_UAU.1 • FIA_UAU.1
FIA_UID.1 • None • None
FIA_USB.1 • FIA_ATD.1 • FIA_ATD.1
FMT_MSA.1(a) • [FDP_ACC.1 or FDP_IFC.1]
• FMT_SMR.1
• FMT_SMF.1
• FDP_ACC.1(a)
• FMT_SMR.1
• FMT_SMF.1
FMT_MSA.1(b) • [FDP_ACC.1 or FDP_IFC.1]
• FMT_SMR.1
• FMT_SMF.1
• FDP_ACC.1(b)
• FMT_SMR.1
• FMT_SMF.1
FMT_MSA.3(a) • FMT_MSA.1
• FMT_SMR.1
• FMT_MSA.1(a)
• FMT_SMR.1
FMT_MSA.3(b) • FMT_MSA.1
• FMT_SMR.1
• FMT_MSA.1(b)
• FMT_SMR.1
FMT_MTD.1 • FMT_SMR.1
• FMT_SMF.1
• FMT_SMR.1
• FMT_SMF.1
FMT_SMF.1 • None • None
FMT_SMR.1 • FIA_UID.1 • FIA_UID.1
FPT_FDI_EXP.1 • FMT_SMF.1
• FMT_SMR.1
• FMT_SMF.1
• FMT_SMR.1
FPT_STM.1 • None • None
FPT_TST.1 • None • None
FTA_SSL.3 • None • None
FTP_ITC.1 • None • None
As above, all dependencies are fulfilled.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
57
©SEIKO EPSON CORPORATION 2020. All rights reserved.
7. TOE Summary Specification
This section describes the TOE summary specification.
7.1. User Identification and Authentication Function
User identification and authentication functions refer to functions to identify and authenticate users of the TOE.
The security function requirements for user identification and authentication are as below.
- FIA_AFL.1, FIA_ATD.1, FIA_SOS.1, FIA_UAU.1, FIA_UAU.7, FIA_UID.1, FIA_USB.1, FTA_SSL.3
(1) FIA_AFL.1 Authentication failure handling
In the event of a failed logon or authentication, the TOE locks the relevant account as per Table 7-1. Lockout
are implemented for an individual interface rather than an individual user.
Table 7-1 Action List Upon Authentication Failure
Logon or Authentication Pattern Action upon unsuccessful authentication
Logon from the operation panel by an
administrator
Lock the relevant administrator out for 0.6 seconds
Logon from the operation panel by a normal
user
Lock the relevant normal user out for 0.6 seconds
Logon from Web Config by an administrator Lock the relevant administrator out for 1 second
Authentication upon receipt of a print job
with a password
Lock the relevant normal user out for 1 second
(2) FIA_ATD.1 User attribute definitions
The TOE defines and maintains user attributes as shown in Table 7-2.
Table 7-2 Security Attribute List
User Security Attribute
U.NORMAL User ID of normal users
User role
Available Function List
U.ADMINISTRATOR User role
(3) FIA_SOS.1 Verification of secrets
The TOE verifies whether a password (password for normal user or administrator) conforms with a defined
quality scale. The quality scale is as below.
- Length: 8 characters or more (maximum 20)
- Character types: must include at least one of the following character types
• Upper-case letters
• Lower-case letters
• Numbers
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
58
©SEIKO EPSON CORPORATION 2020. All rights reserved.
• Symbols (!"#$%&'()*+,-./:;<=>?@[¥]^_`{|}~ )
(4) FIA_UAU.1 Timing of authentication
FIA_UID.1 Timing of identification
The TOE verifies that the User ID and password of a normal user entered when the normal user logs in
matches the User ID and password of the normal user registered in the TOE. The TOE verifies that a
Password Print Job issued by a normal user matches the User ID and password of the normal user
registered in the TOE. The TOE verifies that the User ID and password of an administrator entered when
the administrator logs in matches the User ID and password of the administrator registered in the TOE.
The TOE permits the following actions before normal user or administrator identification and authentication
is implemented.
- Printer information display on operation panel
- Printer information print from operation panel
- Network information display on operation panel
- Network information print from operation panel
- Job list display on operation panel
- Help display on operation panel
- Printer information display on Web Config
- Network information display on Web Config
- Fax information display on operation panel
- Fax information print from operation panel
- Printer maintenance function execution from operation panel
- Printer status display on printer driver
(5) FIA_UAU.7 Protected authentication feedback
The TOE displays the dummy characters shown in Table 7-3 on the logon screen when a password is
entered upon logon from the operation panel or Web Config.
Table 7-3 Dummy Characters during Password Input
Action Dummy character
Logon from the operation panel by an
administrator
* characters equaling the number of characters entered
Logon from the operation panel by a normal
user
* characters equaling the number of characters entered
Logon from Web Config by an administrator Mask characters equaling the number of characters entered
*Masked character types depend on the browser
(6) FIA_USB.1 User-subject binding
If user identification and authentication is successful, the TOE links the User ID of the normal user, user
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
59
©SEIKO EPSON CORPORATION 2020. All rights reserved.
role, and Available Function List user attributes to the subject as shown in Table 7-4.
Table 7-4 Initial Linking Rules for Attributes
User Subject User Security Attribute
Normal user U.NORMAL User ID of normal users
User role
Available Function List
Administrator U.ADMINISTRATOR User role
(7) FTA_SSL.3 TSF-initiated termination
The TOE performs automatic logoff if there is no operation from the operation panel or Web Config for a
certain continuous period of time as shown in Table 7-5.
Table 7-5 User Inactive Time Interval
Action User inactive time interval
Logon from the operation panel by an
administrator
Set time in non-operation timer settings
(can be set by an administrator with a range from 10 seconds
to 240 minutes)
Logon from the operation panel by a normal
user
Set time in non-operation timer settings
(can be set by an administrator with a range from 10 seconds
to 240 minutes)
Logon from Web Config by an administrator 20 minutes
7.2. Document Access Control Function
The document access control function is a function to restrict operations on user data. The security function
requirements for the document access control function are as below.
- FDP_ACC.1(a), FDP_ACF.1(a), FMT_MSA.3(a)
(1) FDP_ACC.1(a) Subset access control
FDP_ACF.1(a) Security attribute based access control
For D.DOC and D.FUNC generated by the basic functions in Table 7-6, the TOE follows access control
rules for each user, and only permits access to data for permitted users.
Table 7-6 Document Access Control Function Access Control Rules
Data Security Attribute Operation User Access control rule
D.DOC
(+PRT)
User ID of normal
users
Document data
attributes
“+PRT”
Print
Delete
Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+PRT”
and a normal user that matches the
normal user User ID
‒ Printing is the operation of
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
60
©SEIKO EPSON CORPORATION 2020. All rights reserved.
print data being input from the
printer driver and temporarily
stored, and then output as a
hard copy
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+PRT”
D.DOC
(+SCN)
User ID of normal
users
Document data
attributes
“+SCN”
Email
attachment
sending
Sending to
specified folder
Delete
Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+SCN”
and a normal user that matches the
normal user User ID
‒ Email attachment sending is
an operation to attach a
D.DOC to an email and send
it, and it completes through a
series of operations with
scanning
‒ Specified folder sending is an
operation to send D.DOC to a
shared folder over a network,
and it completes through a
series of operations with
scanning
Email
attachment
sending
Sending to
specified folder
Delete
Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+SCN”
D.DOC
(+CPY)
User ID of normal
users
Document data
attributes
“+CPY”
Copy print
Delete
Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+CPY”
and a normal user that matches the
normal user User ID
‒ Copy print completes through
a series of operations with
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
61
©SEIKO EPSON CORPORATION 2020. All rights reserved.
scan and hardcopy output
Copy print
Delete
Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+CPY”
D.DOC
(+FAXIN)
Document data
attributes
“+FAXIN”
Fax receiving
and printing
Email
attachment
sending
Sending to
specified folder
Fax forwarding
Preview display
on operation
panel
Delete
Normal user For normal users, to which the fax
receiving function (FAXIN) is
assigned in the Available Function
List, operation is only permitted for
data that has the document data
attribute “+FAXIN”
‒ Email attachment sending is
an operation to attach a
D.DOC to an email and send
it, and it completes through a
series of operations with fax
receiving
‒ Specified folder sending is an
operation to send D.DOC to a
shared folder over a network,
and it completes through a
series of operations with fax
receiving
‒ Fax forwarding is an operation
to transfer a D.DOC to a
separate fax address, and it
completes through a series of
operations with fax receiving
‒ Preview display on operation
panel is an operation to display
a D.DOC on the operation
panel, and it completes
through a series of operations
with fax receiving
Fax receiving
and printing
Email
Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+FAXIN”
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
62
©SEIKO EPSON CORPORATION 2020. All rights reserved.
attachment
sending
Sending to
specified folder
Fax forwarding
Preview display
on operation
panel
Delete
D.DOC
(+FAXOUT)
User ID of normal
users
Document data
attributes
“+FAXOUT”
Fax sending
Preview display
on operation
panel
Delete
Normal user For normal users, operation is only
permitted for data that has the
document data attribute
“+FAXOUT” and a normal user that
matches the normal user User ID
‒ Preview display on operation
panel is an operation to display
a D.DOC on the operation
panel, and it completes
through a series of operations
with fax sending
Fax sending
Preview display
on operation
panel
Delete
Administrator For an administrator, operation is
only permitted for data with the
document data attribute
“+FAXOUT”
D.DOC
(+DSR)
User ID of normal
users
Document data
attributes
“+DSR”
Print document
stored in box
Preview display
on operation
panel
Email
attachment
sending
Sending to
specified folder
Delete
Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+DSR”
and a normal user that matches the
normal user User ID
‒ Printing a document stored in
a box is the operation to output
a hard copy of a D.DOC stored
in a personal box
‒ Preview display on operation
panel is an operation to display
a D.DOC on the operation
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
63
©SEIKO EPSON CORPORATION 2020. All rights reserved.
panel
‒ Email attachment sending is
an operation to attach a
D.DOC to an email and send
it, and it completes through a
series of operations with
document storage and retrieval
‒ Specified folder sending is an
operation to send a D.DOC to
a shared folder over a network,
and it completes through a
series of operations with
document storage and retrieval
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+DSR”
D.FUNC
(+PRT)
User ID of normal
users
Document data
attributes
“+PRT”
Delete Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+PRT”
and a normal user that matches the
normal user User ID
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+PRT”
Alteration Normal user
Administrator
Operation not permitted
D.FUNC
(+SCN)
User ID of normal
users
Document data
attributes
“+SCN”
Delete Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+SCN”
and a normal user that matches the
normal user User ID
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+SCN”
Alteration Normal user
Administrator
Operation not permitted
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
64
©SEIKO EPSON CORPORATION 2020. All rights reserved.
D.FUNC
(+CPY)
User ID of normal
users
Document data
attributes
“+CPY”
Delete Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+CPY”
and a normal user that matches the
normal user User ID
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+CPY”
Alteration Normal user
Administrator
Operation not permitted
D.FUNC
(+FAXIN)
Document data
attributes
“+FAXIN”
Delete Normal user For normal users, to which the fax
receiving function (FAXIN) is
assigned in the Available Function
List, operation is only permitted for
data that has the document data
attribute “+FAXIN”
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute “+FAXIN”
Alteration Normal user
Administrator
Operation not permitted
D.FUNC
(+FAXOUT)
User ID of normal
users
Document data
attributes
“+FAXOUT”
Delete Normal user For normal users, operation is only
permitted for data that has the
document data attribute
“+FAXOUT” and a normal user that
matches the normal user User ID
Delete Administrator For an administrator, operation is
only permitted for data with the
document data attribute
“+FAXOUT”
Alteration Normal user
Administrator
Operation not permitted
D.FUNC
(+DSR)
User ID of normal
users
Document data
attributes
“+DSR”
Delete Normal user For normal users, operation is only
permitted for data that has the
document data attribute “+DSR”
and a normal user that matches the
normal user User ID
Delete Administrator For an administrator, operation is
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
65
©SEIKO EPSON CORPORATION 2020. All rights reserved.
only permitted for data with the
document data attribute “+DSR”
Alteration Normal user
Administrator
Operation not permitted
(2) FMT_MSA.3(a) Static attribute initialisation
For D.DOC and D.FUNC that are newly generated in response to implemented MFP functions, the TOE
configures the attributes shown in Table 7-7 as initial values.
Table 7-7 Security Attribute Initial Values
Function Data Security Attribute Initial Value
MFP function
(print)
D.DOC (+PRT) “User ID for a normal user” of a normal user who created data
Document data attributes (+PRT)
D.FUNC (+PRT)
MFP function
(scan)
D.DOC (+SCN) User ID for a normal user of a normal user who created data
*However, for administrator the identifier is “Administrator”
Document data attributes (+SCN)
D.FUNC (+SCN)
MFP function
(copy)
D.DOC (+CPY) User ID for a normal user of a normal user who created data
*However, for administrator the identifier is “Administrator”
Document data attributes (+CPY)
D.FUNC (+CPY)
MFP function
(fax receiving)
D.DOC (+FAXIN) Document data attributes (+FAXIN)
D.FUNC (+FAXIN)
MFP function
(fax sending)
D.DOC (+FAXOUT) User ID for a normal user of a normal user who created data
*However, for administrator the identifier is “Administrator”
Document data attributes (+FAXOUT)
D.FUNC (+FAXOUT)
MFP function
(Document
Storage and
Retrieval
Functions)
D.DOC (+DSR) User ID for a normal user of a normal user who created data
*However, for administrator the identifier is “Administrator”
Document data attributes (+DSR)
D.FUNC (+DSR)
Note, the owner of documents related to fax receiving is a normal user to whom the Available Function List
fax receiving function (FAXIN) has been granted by an administrator, and the owner of documents related
to fax sending is a normal user to whom the Available Function List fax sending function (FAXOUT) has
been granted by an administrator. Furthermore, the initial value of the security attributes shown in Table
7-7 are default values, and access is restricted by these security attributes meaning they are restrictive,
and no function exists to define initial values that differ from the default values.
7.3. Access Control Function for TOE Function
The access control function for TOE functions is a function to restrict operation of TOE functions. The security
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
66
©SEIKO EPSON CORPORATION 2020. All rights reserved.
function requirements for the access control function for TOE functions are as below.
- FDP_ACC.1(b), FDP_ACF.1(b), FMT_MSA.3(b)
(1) FDP_ACC.1(b) Subset access control
FDP_ACF.1(b) Security attribute based access control
For basic functions in Table 7-8, the TOE follows access control rules for each user, and only permits
permitted users to execute jobs.
Table 7-8 Access Control Rules of Access Control Function for TOE Functions
Function Operation User Access control rule
MFP function
(print)
Job execution
Job deletion
Normal user For normal users to which the print
(PRT) function is assigned in the
Available Function List, operation is
permitted
Job deletion Administrator For an administrator, operation is only
permitted for functions with the
function type “print”
MFP function
(scan)
Job execution
Job deletion
Normal user For normal users to which the scan
(SCN) function is assigned in the
Available Function List, operation is
permitted
Job execution
Job deletion
Administrator For an administrator, operation is only
permitted for functions with the
function type “scan attribute”
MFP function
(copy)
Job execution
Job deletion
Normal user For normal users to which the copy
(CPY) function is assigned in the
Available Function List, operation is
permitted
Job execution
Job deletion
Administrator For an administrator, operation is only
permitted for functions with the
function type “copy attribute”
MFP function
(fax)
Job execution
Job deletion
Normal user For normal users to which the fax
receiving function (FAXIN) and fax
sending function (FAXOUT) are
assigned in the Available Function List,
operation is permitted
Job execution
Job deletion
Administrator For an administrator, operation is only
permitted for functions with the
function type “fax attribute”
MFP function Job execution Normal user For normal users to which the
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
67
©SEIKO EPSON CORPORATION 2020. All rights reserved.
(document
storage and
retrieval)
Job deletion document storage and retrieval (DSR)
function is assigned in the Available
Function List, operation is permitted
Job execution
Job deletion
Administrator For an administrator, operation is only
permitted for functions with the
function type “document storage and
retrieval attribute”
(2) FMT_MSA.3(b) Static attribute initialisation
For newly registered U.NORMAL, the TOE configures the Available Function List as the security attributes,
but initial values disable use of all functions. The initial value of the security attributes are default values,
and access is restricted by these security attributes meaning they are restrictive, and no function exists to
define initial values that differ from the default values.
7.4. Security Management Function
The security management function is a function to manage security functions. The security function
requirements for security management functions are as below.
- FMT_MSA.1(a), FMT_MSA.1(b), FMT_MTD.1, FMT_SMF.1, FMT_SMR.1
(1) FMT_MSA.1(a) Management of security attributes
The TOE permits the following operations for administrator.
- Deletion, and new creation for User ID of normal users
- Available Function List modify
There are no roles that can modify the document data attributes and user roles.
(2) FMT_MSA.1(b) Management of security attributes
The TOE permits the following operations for administrator.
- Available Function List modify
There are no roles that can modify the function type and user roles.
(3) FMT_MTD.1 Management of TSF Data
The TOE only permits operations on TSF data by roles for which the operations in Table 7-9 are permitted.
Table 7-9 Management of TSF Data
TSF data Operation
User role for which operation is
permitted
User ID of normal users delete, newly create Administrator
Administrator user ID modify None
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
68
©SEIKO EPSON CORPORATION 2020. All rights reserved.
List of recipients for
scan/fax/email or address book
delete, newly create Administrator
Job status log modify None
Password policy modify Administrator
Non-operation timer setting modify Administrator
Administrator authentication
settings (operation panel)
modify Administrator
User restriction settings modify Administrator
IPsec settings modify Administrator
Time settings modify Administrator
Network settings modify Administrator
Hash value for verifying integrity
of firmware
modify None
Normal user passwords delete, newly create Administrator
query None
Administrator password modify Administrator
query None
Passwords to access external
devices such as a mail server or
file server
Newly create, modify Administrator
query None
IPsec preshared key modify Administrator
query None
(4) FMT_SMF.1 Specification of Management Functions
The TOE provides the security management functions below.
Table 7-10 Management Function List
Management Functionality
Registration/deletion of user ID for normal users by U.ADMINISTRATOR
Registration/deletion of list of recipients for scan/fax/email or address book by U.ADMINISTRATOR
Change of password policy by U.ADMINISTRATOR
Change of non-operation timer settings by U.ADMINISTRATOR
Change of administrator authentication settings (operation panel) by U.ADMINISTRATOR
Change of user restriction settings by U.ADMINISTRATOR
Change of IPsec settings by U.ADMINISTRATOR
Change of time settings by U.ADMINISTRATOR
Change of network settings by U.ADMINISTRATOR
Registration/deletion of U.NORMAL user password for normal users by U.ADMINISTRATOR
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
69
©SEIKO EPSON CORPORATION 2020. All rights reserved.
Change of U.ADMINISTRATOR administrator password by U.ADMINISTRATOR
Registration/change of passwords to access external devices such as a mail server or file server by
U.ADMINISTRATOR
Change of IPsec preshared key by U.ADMINISTRATOR
(5) FMT_SMR.1 Security roles
The TOE has the following roles, and links users to a role.
- Normal user
- Administrator
7.5. Residual Data Overwrite Function
The residual data overwrite function is a function to completely erase deleted or temporarily stored documents
from an HDD or Flash ROM and make them unrecoverable. The security function requirements for the residual
data overwrite function are as below.
- FDP_RIP.1
(1) FDP_RIP.1 Subset residual information protection
The TOE erases D.DOC saved on the HDD or Flash ROM after jobs performed by basic functions complete.
The space used for D.DOC is sequentially overwritten with a specific value (0x00) to erase it. Overwriting
to erase from the HDD is performed when the TOE starts up, and when residual data is discovered by the
audit process. The TOE can also perform overwriting through manual operation from the operation panel.
7.6. Self-Test Function
The self test function is a function that verifies that part of the TSF operates normally and part of TSF data and
TSF implementation code are complete when the MFP starts up. The security function requirements for the self
test function are as below.
- FPT_TST.1
(1) FPT_TST.1 TSF test
The TOE performs the following self tests when the MFP starts up.
- It provides a function that calculates a hash value from the firmware file and checks that it matches
the value stored in the TOE (a hash value to verifying integrity of the firmware), and by doing so verifies
the integrity of part of the TSF data (firmware hash value) and the TSF implementation code as well
as partially verifying the normal TSF operation
If an abnormality is detected in the self test, the TOE displays an error message on the MFP’s operation
panel and does not permit any subsequent operations.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
70
©SEIKO EPSON CORPORATION 2020. All rights reserved.
7.7. Audit Log Function
The audit log function is a function that records TOE usage and security-related events as an audit log for
reference. The security function requirements for the audit log function are as below.
- FAU_GEN.1, FAU_GEN.2, FAU_SAR.1, FAU_SAR.2, FAU_STG.1, FAU_STG.4, FPT_STM.1
(1) FAU_GEN.1 Audit data generation
If an auditable event shown in Table 7-11 occurs, the TOE creates audit data and records it as an audit log.
Table 7-11 Auditable Events
Auditable Event Audit Data Additional information
Audit log function start (success) • Date of auditable event
occurrence
• Type of auditable event
• Subject identification information
of auditable event
• Result of auditable event
• None
Audit log function end (success) • None
Use of authentication mechanism
(success/failure)
• None
Use of identification mechanism
(success/failure)
• None
Use of management functions
(success/failure)
• None
Change of time (success/failure) • None
IPsec communication fail • Communication
recipient IP address
The identification mechanism and authentication mechanism are unified, so if identification and
authentication fail, there is no need to identify if it is an "identification-only failure". As such, user
identification test is not applicable as additional information for the auditable event "use of identification
mechanism (success/failure)".
(2) FAU_GEN.2 User identity association
If an auditable event is brought about by a user’s action, the TOE links the identification information of the
user who caused it to the auditable event.
(3) FAU_SAR.1 Audit review
The TOE permits administrator to read audit logs. The TOE also converts audit logs into a format the
administrator can interpret. Administrator logons to Web Config to obtain audit logs (CSV format).
(4) FAU_SAR.2 Restricted audit review
The TOE only permits administrator to read audit logs.
EPSON LX-10020M/WF-M21000 with FAX Security Target Rev.05
71
©SEIKO EPSON CORPORATION 2020. All rights reserved.
(5) FAU_STG.1 Protected audit trail storage
The TOE does not permit any user to edit audit logs. Also, the TOE permits only administrators to delete
audit logs.
(6) FAU_STG.4 Prevention of audit data loss
When the audit logs are full, the TOE overwrites the audit logs starting with the oldest log.
(7) FPT_STM.1 Reliable time stamps
The TOE has an internal system clock. When an auditable event occurs, the date and time of the
occurrence is recorded in the audit log using the system clock. The system clock obtains the time accurately
from an NTP server, and it can also be synchronized.
7.8. Network Protection Function
The network protection function is a function to prevent information leakage and data tampering from the
network due to eavesdropping when using the LAN. The security function requirements for the network
protection function are as below.
- FPT_FDI_EXP.1, FTP_ITC.1
(1) FPT_FDI_EXP.1 Restricted information transfer to external interfaces
The TOE places fixed restrictions on wired LAN and telephone line information transfer as follows.
- The TOE does not directly transfer information input from a wired LAN to a telephone line without
additional processing by TSF
- The TOE does not directly transfer information input from a telephone line to a wired LAN without
additional processing by TSF
(2) FTP_ITC.1 Inter-TSF trusted channel
During communication between the MFP and servers/client PC, the TOE communicates using a trusted
channel. The TOE provides IPsec encryption as a trusted channel. Table 7-12 shows the specifications
regarding IPsec encrypted communication.
Table 7-12 IPsec Specifications
Item Details
Encryption algorithm AES(128bits,192bits,256bits)