ETSI GS NFV-SEC 031 V5.2.1 (2024-11)

Network Function Virtualisation (NFV) Release 5; Security; Security Assurance Specification (SCAS) for NFVO

DGS/NFV-SEC031

General Information

• Status: Not Published
• Technical Committee: NFV SEC - Security
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Due Date: 04-Dec-2024
• Completion Date: 22-Nov-2024

Standards Content (Sample)

GROUP SPECIFICATION
Network Function Virtualisation (NFV) Release 5;
Security;
Security Assurance Specification (SCAS) for NFVO
Disclaimer
The present document has been produced and approved by the Network Functions Virtualisation (NFV) ETSI Industry
Specification Group (ISG) and represents the views of those members who participated in this ISG.
It does not necessarily represent the views of the entire ETSI membership.

2 ETSI GS NFV-SEC 031 V5.2.1 (2024-11)

Reference
DGS/NFV-SEC031
Keywords
assurance, MANO, NFV, NFVO, orchestration,
SCAS, security, test
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ETSI
3 ETSI GS NFV-SEC 031 V5.2.1 (2024-11)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 5
3.1 Terms . 5
3.2 Symbols . 6
3.3 Abbreviations . 6
4 Catalogue of security requirements and related test cases for NFVO product . 6
4.1 Introduction . 6
4.2 Security functional requirements and related test cases . 6
4.2.1 Introduction. 6
4.2.2 Security functional requirements deriving from ETSI specifications and related test cases . 6
4.2.2.1 Verification of VNF package integrity and authenticity during on-boarding procedure . 6
4.2.2.2 Verification of NSD integrity after on-boarding procedure . 7
4.2.2.3 Anti-rollback protection for VNF package . 8
4.3 Security requirements and related test cases related to hardening . 9
4.3.1 Introduction. 9
4.3.2 Secure NFVO VNF Image Repositories - Integrity Protection . 9
4.3.3 Secure NFVO VNF Image Repositories - Confidentiality Protection . 11
4.4 Baseline vulnerability testing requirements . 12
4.4.1 Introduction. 12
Annex A (informative): Aspects specific to the network product class NFVO . 13
A.1 Network product class description for the NFVO . 13
A.1.1 Introduction . 13
A.1.2 Minimum set of functions defining the NFVO network product class . 13
A.2 Assets and threats specific to the NFVO . 13
A.2.1 Critical assets . 13
A.2.2 Threats related to orchestration procedures . 13
A.2.2.1 VNF Image Tampering . 13
A.2.2.2 VNF Image Eavesdropping . 14
A.2.2.3 Failure to perform the anti-rollback protection . 14
History . 15

ETSI
4 ETSI GS NFV-SEC 031 V5.2.1 (2024-11)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
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Foreword
This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Network Functions
Virtualisation (NFV).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

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5 ETSI GS NFV-SEC 031 V5.2.1 (2024-11)
1 Scope
The present document defines the security assurance of Network Functions Virtualisation Orchestrator (NFVO)
products, which is part of MANO system. The outcome of the present document expects the security assets, security
threats, security requirements and test cases for evaluating the security NFVO products. In the present document, the
security assurance methodology introduced in 3GPP specifications will be leveraged. Security test cases including
testing goals, testing steps, and evidence of testing results will be produced for evaluating whether the security
requirements are implemented by NFVO based products.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI GS NFV-SEC 028: "Network Functions Virtualisation (NFV) Release 5; Security; Security
Assurance Specification (SCAS) for Generic NFV-MANO".
[2] ETSI GS NFV-IFA 010: "Network Functions Virtualisation (NFV) Release 5; Management and
Orchestration; Functional requirements specification".
[3] ETSI GS NFV-SEC 021: "Network Functions Virtualisation (NFV) Release 4; Security; VNF
Package Security Specification".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI GS NFV 003: "Network Functions Virtualisation (NFV); Terminology for Main Concepts in
NFV".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in ETSI GS NFV 003 [i.1] apply.
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6 ETSI GS NFV-SEC 031 V5.2.1 (2024-11)
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI GS NFV 003 [i.1] apply.
4 Catalogue of security requirements and related test
cases for NFVO product
4.1 Introduction
The present clause describes security functional requirements and the corresponding test cases for NFVO products. It is
noted that the requirements for interfaces external to NFV-MANO in ETSI GS NFV-SEC 028 [1] are applicable to the
interfaces for NFVO by default. Exceptions shall be listed with justifications.
4.2 Security functional requirements and related test cases
4.2.1 Introduction
All test cases in clause 4.2 of ETSI GS NFV SEC 028 [1] can be applied to NFVO products with the exceptions listed
in the following clauses.
4.2.2 Security functional requirements deriving from ETSI specifications
and related test cases
4.2.2.1 Verification of VNF package integrity and authenticity during on-boarding
procedure
Requirement Name: Verification of VNF package integrity and authenticity during on-boarding procedure
Requirement Reference: ETSI GS NFV-IFA 010 [2], clause 6.5.1
Requirement Description:
"The NFVO shall support the capability to verify the integrity and authenticity of the VNF Package". As specified in
ETSI GS NFV-IFA 010 [2], clause 6.5.1, Nfvo.VnfPkgm.002.
Threat Reference: ETSI GS NFV-SEC 028 [1], clause B.3.4.1, Software Tampering
Test case:
Test Name: TC_VERIFICATION_VNF_PACKAGE_INTEGRITY_AUTHENTICATION
Purpose:
To test whether NFVO under test will verify the integrity and authenticity of the VNF package during on-boarding
procedure.
Procedure and execution steps:
Pre-Conditions:
The NFVO documentation describes information regarding integrity and authenticity protection of VNF package.
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7 ETSI GS NFV-SEC 031 V5.2.1 (2024-11)
A valid VNF package and an invalid VNF package (e.g. a tampered image in VNF package) are available.
A VNF package signed by the private key of A acting as the legitimate VNF vendor, and the same VNF package signed
by the private key of B acting as the malicious VNF vendor.
The certificate or the public key which is used to verify the digital signature of VNF package has been pre-configured in
the NFVO.
There is a simulated BSS in the test environment. The tester is able to trace traffic between the NFVO and the BSS.
Execution Steps:
Test case 1: Verify the integrity of the VNF package.
1) The tester intercepts the traffic between the BSS and the NFVO.
2) During VNF package on-boarding, the tester uploads the valid VNF package into the NFVO as BSS. The
NFVO validates the digital signature of the VNF package using the pre-configured certificate.
3) During VNF package on-boarding, the tester uploads the invalid VNF package into the NFVO as BSS. The
NFVO validates the digital signature of the VNF package using the pre-configured certificate.
Test case 2: Verify the authenticity of the VNF package.
1) The tester interce
...