Certification Report
EAL 3+ Evaluation of Extreme Networks ExtremeXOS
Network Operating System v12.3.6.2
Issued by:
Communications Security Establishment Canada
Certification Body
Canadian Common Criteria Evaluation and Certification Scheme
© Government of Canada, Communications Security Establishment Canada, 2012
Document number: 383-4-146-CR
Version: 1.0
Date: 28 March 2012
Pagination: i to iii, 1 to 9
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DISCLAIMER
The Information Technology (IT) product identified in this certification report, and its
associated certificate, has been evaluated at an approved evaluation facility – established
under the Canadian Common Criteria Evaluation and Certification Scheme (CCS) – using
the Common Methodology for Information Technology Security Evaluation, Version 3.1
Revision 3, for conformance to the Common Criteria for Information Technology Security
Evaluation, Version 3.1 Revision 3. This certification report, and its associated certificate,
apply only to the identified version and release of the product in its evaluated configuration.
The evaluation has been conducted in accordance with the provisions of the CCS, and the
conclusions of the evaluation facility in the evaluation report are consistent with the evidence
adduced. This report, and its associated certificate, are not an endorsement of the IT product
by the Communications Security Establishment Canada, or any other organization that
recognizes or gives effect to this report, and its associated certificate, and no warranty for the
IT product by the Communications Security Establishment Canada, or any other organization
that recognizes or gives effect to this report, and its associated certificate, is either expressed
or implied.
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FOREWORD
The Canadian Common Criteria Evaluation and Certification Scheme (CCS) provides a
third-party evaluation service for determining the trustworthiness of Information Technology
(IT) security products. Evaluations are performed by a commercial Common Criteria
Evaluation Facility (CCEF) under the oversight of the CCS Certification Body, which is
managed by the Communications Security Establishment Canada.
A CCEF is a commercial facility that has been approved by the CCS Certification Body to
perform Common Criteria evaluations; a significant requirement for such approval is
accreditation to the requirements of ISO/IEC 17025:2005, the General Requirements for the
Competence of Testing and Calibration Laboratories. Accreditation is performed under the
Program for the Accreditation of Laboratories - Canada (PALCAN), administered by the
Standards Council of Canada.
The CCEF that carried out this evaluation is CGI IT Security Evaluation & Test Facility
located in Ottawa, Canada.
By awarding a Common Criteria certificate, the CCS Certification Body asserts that the
product complies with the security requirements specified in the associated security target. A
security target is a requirements specification document that defines the scope of the
evaluation activities. The consumer of certified IT products should review the security target,
in addition to this certification report, in order to gain an understanding of any assumptions
made during the evaluation, the IT product's intended environment, its security requirements,
and the level of confidence (i.e., the evaluation assurance level) that the product satisfies the
security requirements.
This certification report is associated with the certificate of product evaluation dated 28
March 2012, and the security target identified in Section 4 of this report.
The certification report, certificate of product evaluation and security target are posted on the
CCS Certified Products list (CPL) and the Common Criteria Portal (the official website of
the Common Criteria Project).
Reproduction of this report is authorized provided the report is reproduced in its entirety.
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TABLE OF CONTENTS
Disclaimer....................................................................................................................................... i
Foreword........................................................................................................................................ii
Executive Summary...................................................................................................................... 1
1 Identification of Target of Evaluation ................................................................................ 2
2 TOE Description ................................................................................................................... 2
3 Evaluated Security Functionality........................................................................................ 2
4 Security Target...................................................................................................................... 2
5 Common Criteria Conformance.......................................................................................... 2
6 Security Policy....................................................................................................................... 3
7 Assumptions and Clarification of Scope............................................................................. 3
7.1 SECURE USAGE ASSUMPTIONS................................................................................... 3
7.2 ENVIRONMENTAL ASSUMPTIONS ............................................................................... 3
7.3 CLARIFICATION OF SCOPE.......................................................................................... 4
8 Evaluated Configuration...................................................................................................... 4
9 Documentation ...................................................................................................................... 5
10 Evaluation Analysis Activities ............................................................................................. 5
11 ITS Product Testing.............................................................................................................. 6
11.1 ASSESSMENT OF DEVELOPER TESTS .......................................................................... 6
11.2 INDEPENDENT FUNCTIONAL TESTING ........................................................................ 7
11.3 INDEPENDENT PENETRATION TESTING....................................................................... 7
11.4 CONDUCT OF TESTING ............................................................................................... 8
11.5 TESTING RESULTS...................................................................................................... 8
12 Results of the Evaluation...................................................................................................... 8
13 Evaluator Comments, Observations and Recommendations ........................................... 8
14 Acronyms, Abbreviations and Initializations..................................................................... 8
15 References.............................................................................................................................. 9
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Executive Summary
The Extreme Networks ExtremeXOS Network Operating System v12.3.6.2 (hereafter
referred to as EXOS), from Extreme Networks, Inc., is the Target of Evaluation for this
Evaluation Assurance Level (EAL) 3 augmented evaluation.
EXOS is network switching software, designed to provide network traffic management and
control. The TOE runs on network switch appliances, it is designed specifically for the
Extreme Networks Black Diamond and Summit network switches. It provides logical
connections for management of network traffic flow and for management access. It is a
software-only TOE.
CGI IT Security Evaluation & Test Facility is the CCEF that conducted the evaluation. This
evaluation was completed on 20 March 2012 and was carried out in accordance with the
rules of the Canadian Common Criteria Evaluation and Certification Scheme (CCS).
The scope of the evaluation is defined by the security target, which identifies assumptions
made during the evaluation, the intended environment for EXOS, the security requirements,
and the level of confidence (evaluation assurance level) at which the product is intended to
satisfy the security requirements. Consumers are advised to verify that their operating
environment is consistent with that specified in the security target, and to give due
consideration to the comments, observations and recommendations in this certification
report.
The results documented in the Evaluation Technical Report (ETR)1
for this product provide
sufficient evidence that it meets the EAL 3 augmented assurance requirements for the
evaluated security functionality. The evaluation was conducted using the Common
Methodology for Information Technology Security Evaluation, Version 3.1 Revision 3, for
conformance to the Common Criteria for Information Technology Security Evaluation,
Version 3.1 Revision 3. The following augmentation is claimed: ALC_FLR.2 – Flaw
reporting procedures.
Communications Security Establishment Canada, as the CCS Certification Body, declares
that the EXOS evaluation meets all the conditions of the Arrangement on the Recognition of
Common Criteria Certificates and that the product will be listed on the CCS Certified
Products List (CPL) and the Common Criteria portal (the official website of the Common
Criteria Project).
1
The ETR is a CCS document that contains information proprietary to the developer and/or the evaluator, and
is not releasable for public review.
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1 Identification of Target of Evaluation
The Target of Evaluation (TOE) for this Evaluation Assurance Level (EAL) 3 augmented
evaluation is Extreme Networks ExtremeXOS Network Operating System v12.3.6.2
(hereafter referred to as EXOS), from Extreme Networks, Inc.
2 TOE Description
EXOS is network switching software, designed to provide network traffic management and
control. The TOE runs on network switch appliances, and is designed specifically for the
Extreme Networks Black Diamond and Summit network switches. It provides logical
connections for management of network traffic flow and for management access. It is a
software-only TOE.
A detailed description of the EXOS architecture is found in Section 1.4.1 of the Security
Target (ST).
3 Evaluated Security Functionality
The complete list of evaluated security functionality for EXOS is identified in Section 1.4.3
of the ST.
4 Security Target
The ST associated with this Certification Report is identified by the following nomenclature:
Title: Extreme Networks, Inc. ExtremeXOS Network Operating System v12.3.6.2
Security Target
Version: 0.9
Date: 12 March 2012
5 Common Criteria Conformance
The evaluation was conducted using the Common Methodology for Information Technology
Security Evaluation, Version 3.1 Revision 3, for conformance to the Common Criteria for
Information Technology Security Evaluation, Version 3.1 Revision 3.
EXOS is:
a. Common Criteria Part 2 conformant, with security functional requirements based only
upon functional components in Part 2; and
b. Common Criteria Part 3 conformant, with security assurance requirements based only
upon assurance components in Part 3; and
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c. Common Criteria EAL 3 augmented, containing all security assurance requirements in
the EAL 3 package, as well as the following: ALC_FLR.2 – Flaw reporting procedures.
6 Security Policy
EXOS implements a role-based access control policy to control user access to the system, as
well as an information flow control policy to control information entering the system; details
of these security policies can be found in Section 7 of the ST.
In addition, EXOS implements policies pertaining to security audit, user data protection,
identification and authentication, and security management. Further details on these security
policies may be found in Section 7 of the ST.
7 Assumptions and Clarification of Scope
Consumers of EXOS should consider assumptions about usage and environmental settings as
requirements for the product’s installation and its operating environment. This will ensure
the proper and secure operation of the TOE.
7.1 Secure Usage Assumptions
The following Secure Usage Assumptions are listed in the ST:
 The TOE administrators will periodically review the audit records generated by the
TOE.
 The TOE will be placed in a network infrastructure such that information to be
controlled will always flow through the TOE.
 The TOE does not have the ability to run general purpose applications and does not
host public data.
 Only administrators have access to the administrative interfaces to ensure the network
is secure.
 The users who manage the TOE are non-hostile, appropriately trained, and follow all
guidance.
7.2 Environmental Assumptions
The following Environmental Assumption is listed in the ST:
 The processing resources of the TOE will be located within controlled access
facilities, which will prevent unauthorized physical access.
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7.3 Clarification of Scope
EXOS offers protection against inadvertent or casual attempts to breach system security by
unsophisticated attackers possessing basic attack potential. EXOS is not intended for
situations which involve determined attempts by hostile or well-funded attackers using
sophisticated attack techniques.
8 Evaluated Configuration
The evaluated configuration for EXOS comprises the TOE running on the following
appliances:
 BlackDiamond 8500/8800/8900 Series Switch
 Summit X150 Series
 Summit X250e Series
 Summit X350 Series
 Summit X450 Series
 Summit X450a Series
 Summit X450e Series
 Summit X650 Series
 SummitStack
Section 1.4 of the ST provides more details about the evaluated configuration and
architecture.
The publication entitled: Extreme Networks, Inc. ExtremeXOS Network Operating System
v12.3.6.2 Guidance Documentation Supplement, v0.7 describes the procedures necessary to
install and operate EXOS in its evaluated configuration.
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9 Documentation
The following Extreme Networks, Inc. documents provided to the consumer are as follows:
a. Summit Family Switches Hardware Installation Guide, Summit x150, x250e, x350, x450,
x450a, x450e, x650 Series, SummitStack, Published: July 2011, Part Number: 100286-00
Rev. 12;
b. BlackDiamond 8800 Series Switches Hardware Installation Guide, BlackDiamond 8806
Switch, BlackDiamond 8810 Switch, Published: July 2011, Part Number: 100284-00
Rev. 12;
c. ExtremeXOS Concepts Guide, Software Version 12.3, Published: August 2009, Part
Number: 100339-00 Rev. 02;
d. ExtremeXOS Command Reference Guide, Software Version 12.3, Published: August
2009, Part Number: 100340-00 Rev. 02; and
e. Extreme Networks, Inc. ExtremeXOS Network Operating System v12.3.6.2 Guidance
Documentation Supplement, v0.7
10 Evaluation Analysis Activities
The evaluation analysis activities involved a structured evaluation of EXOS, including the
following areas:
Development: The evaluators analyzed the EXOS functional specification and design
documentation; they determined that the design completely and accurately describes the TOE
security functionality (TSF) interfaces, the TSF subsystems and how the TSF implements the
security functional requirements (SFRs). The evaluators analyzed the EXOS security
architectural description and determined that the initialization process is secure and that the
security functions are protected against tamper and bypass. The evaluators also
independently verified that the correspondence mappings between the design documents are
correct.
Guidance Documents: The evaluators examined the EXOS preparative user guidance and
operational user guidance and determined that it sufficiently and unambiguously describes
how to securely transform the TOE into its evaluated configuration and how to use and
administer the product. The evaluators examined and tested the preparative and operational
guidance, and determined that they are complete and sufficiently detailed to result in a secure
configuration.
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Life-cycle support: An analysis of the EXOS configuration management system and
associated documentation was performed. The evaluators found that the EXOS configuration
items were clearly marked and that the access control measures as described in the
configuration management documentation are effective in preventing unauthorized access to
the configuration items. The developer’s configuration management system was also
observed during the site visit, and it was found to be mature and well-developed.
During the site visit the evaluators examined the development security procedures and
determined that they detailed sufficient security measures for the development environment
to protect the confidentiality and integrity of the EXOS design and implementation. The
evaluators confirmed that the developer used a documented model of the TOE life-cycle and
that the life-cycle model provides for the necessary control over the development and
maintenance of the TOE.
The evaluators examined the delivery documentation and determined that it described all of
the procedures required to maintain the integrity of EXOS during distribution to the
consumer.
The evaluators reviewed the flaw remediation procedures used by Extreme Networks, Inc.
for EXOS. During a site visit, the evaluators examined the evidence generated by adherence
to the procedures. The evaluators concluded that the procedures are adequate to track and
correct security flaws, and distribute the flaw information and corrections to consumers of
the product.
Vulnerability assessment: The evaluators conducted an independent vulnerability analysis
of EXOS. Additionally, the evaluators conducted a review of public domain vulnerability
databases, and a search of all evaluation deliverables. The evaluators identified potential
vulnerabilities for testing applicable to EXOS in its operational environment.
All these evaluation activities resulted in PASS verdicts.
11 ITS Product Testing
Testing at EAL 3 consists of the following three steps: assessing developer tests, performing
independent functional tests, and performing penetration tests.
11.1 Assessment of Developer Tests
The evaluators verified that the developer has met their testing responsibilities by examining
their test evidence, and reviewing their test results, as documented in the ETR2
.
2
The ETR is a CCS document that contains information proprietary to the developer and/or the evaluator, and
is not releasable for public review.
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The evaluators analyzed the developer’s test coverage and depth analysis and found them to
be complete and accurate. The correspondence between the tests identified in the developer’s
test documentation and the functional specification and TOE design was complete.
11.2 Independent Functional Testing
During this evaluation, the evaluator developed independent functional tests by examining
design and guidance documentation, examining the developer's test documentation,
executing a sample of the developer's test cases, and creating test cases that augmented the
developer tests.
All testing was planned and documented to a sufficient level of detail to allow repeatability
of the testing procedures and results. Resulting from this test coverage approach is the
following list of CGI IT Security Evaluation & Test Facility test goals:
a. Repeat of Developer's Tests: The objective of this test goal is to repeat a subset of the
developer's tests;
b. Security Audit; The objective of this test goal is to verify that the audit functionality of
the TOE works correctly with regards to logging authentication attempts and audit start-
up/shutdown
c. Identification and authentication; the objective of this test goal is to verify that users are
required to authenticate before taking any actions and that user accounts can be managed;
d. Data Flow Control; The objective of this test goal is to confirm that the Switch Flow
Traffic Flow SFP can be properly implemented; and
e. Remote Management; The objective of this test goal is to demonstrate the TOE can be
remotely managed by an authorized administrator via SNMP.
11.3 Independent Penetration Testing
Subsequent to the independent review of public domain vulnerability databases and all
evaluation deliverables, limited independent evaluator penetration testing was conducted.
The penetration tests focused on:
a. Attempting to bypass the flow control rules defined by the TOE ; and
b. Compromising the TSF and gaining access to VLAN traffic that should be inaccessible.
The independent penetration testing did not uncover any exploitable vulnerabilities in the
intended operating environment.
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11.4 Conduct of Testing
EXOS was subjected to a comprehensive suite of formally documented, independent
functional and penetration tests. The testing took place at the Information Technology
Security Evaluation and Test (ITSET) Facility at CGI IT Security Evaluation & Test Facility.
The CCS Certification Body witnessed a portion of the independent testing. The detailed
testing activities, including configurations, procedures, test cases, expected results and
observed results are documented in a separate Test Results document.
11.5 Testing Results
The developer’s tests and the independent functional tests yielded the expected results,
giving assurance that EXOS behaves as specified in its ST and functional specification and
TOE design.
12 Results of the Evaluation
This evaluation has provided the basis for an EAL 3+. The overall verdict for the evaluation
is PASS. These results are supported by evidence in the ETR.
13 Evaluator Comments, Observations and Recommendations
The evaluator recommends that suitable protections are in place in the IT environment to
secure any devices interacting with the TOE, such as TFTP, syslog and SNMP servers.
14 Acronyms, Abbreviations and Initializations
Acronym/Abbreviation/
Initialization
Description
CCEF Common Criteria Evaluation Facility
CCS Canadian Common Criteria Evaluation and
Certification Scheme
CPL Certified Products list
CM Configuration Management
EAL Evaluation Assurance Level
ETR Evaluation Technical Report
IT Information Technology
ITSET Information Technology Security Evaluation
and Testing
PALCAN Program for the Accreditation of Laboratories
- Canada
SFR Security Functional Requirement
ST Security Target
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Acronym/Abbreviation/
Initialization
Description
TOE Target of Evaluation
TSF TOE Security Functionality
15 References
This section lists all documentation used as source material for this report:
a. CCS Publication #4, Technical Oversight, Version 1.8, October 2010.
b. Common Criteria for Information Technology Security Evaluation, Version 3.1
Revision 3, July 2009.
c. Common Methodology for Information Technology Security Evaluation, CEM,
Version 3.1 Revision 3, July 2009.
d. Extreme Networks, Inc. ExtremeXOS Network Operating System v12.3.6.2 Security
Target, 0.9, 12 March 2012
e. EAL3+ Common Criteria Evaluation of Extreme Networks, Inc. ExtremeXOS
Network Operating System v12.3.6.2 Evaluation Technical Report (ETR), v1.0, 20
March 2012