ETSI GS NFV-SEC 028 V5.1.1 (2024-05)

Network Functions Virtualisation (NFV) Release 5; Security; Security Assurance Specification (SCAS) for Generic NFV-MANO

RGS/NFV-SEC028ed511

General Information

• Status: Not Published
• Technical Committee: NFV SEC - Security
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Due Date: 16-May-2024
• Completion Date: 14-May-2024

Standards Content (Sample)

GROUP SPECIFICATION
Network Functions Virtualisation (NFV) Release 5;
Security;
Security Assurance Specification (SCAS)
for Generic NFV-MANO
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 028 V5.1.1 (2024-05)

Reference
RGS/NFV-SEC028ed511
Keywords
MANO, NFV, SCAS, security, test

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ETSI
3 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Catalogue of security requirements and related test cases for generic part of NFV-MANO
products . 8
4.1 Introduction . 8
4.2 Security functional requirements and related test cases . 8
4.2.1 Introduction. 8
4.2.2 Security functional requirements on the NFV-MANO deriving from ETSI specifications and related
test cases . 9
4.2.2.1 Security functional requirements deriving from ETSI NFV specifications - general approach . 9
4.2.2.2 Security functional requirements deriving from ETSI specifications - general Interface aspects . 9
4.2.2.2.1 Introduction . 9
4.2.2.2.2 Protection at the transport layer . 9
4.2.3 Technical Baseline . 11
4.2.3.1 Introduction . 11
4.2.4 Operating systems . 11
4.2.4.1 General operating system requirements and related test cases . 11
4.2.5 Web servers . 11
4.2.5.1 General web servers' requirements and related test cases . 11
4.2.6 Network devices . 11
4.2.6.1 General network devices requirements and related test cases . 11
4.2.6.2 GTP-C and GTP-U Filtering . 11
4.2.6.2.1 GTP-C Filtering . 11
4.2.6.2.2 GTP-U Filtering. 11
4.3 Security requirements and related test cases related to hardening . 11
4.3.1 Introduction. 11
4.3.2 Technical Baseline . 12
4.3.2.1 Introduction . 12
4.3.3 Operating Systems . 12
4.3.3.1 Introduction . 12
4.3.4 Web Servers . 12
4.3.4.1 Introduction . 12
4.3.5 Network Devices . 12
4.3.5.0 Introduction . 12
4.3.5.1 Traffic Separation . 12
4.3.6 Network Functions in service-based architecture . 12
4.3.6.0 Introduction . 12
4.3.6.1 No code execution or inclusion of external resources by JSON parsers . 12
4.3.6.2 Unique key values in IEs . 12
4.3.6.3 The valid format and range of values for IEs . 12
4.4 Baseline vulnerability testing requirements . 13
4.4.1 Introduction. 13
4.4.2 Port Scanning . 13
4.4.3 Vulnerability Scanning . 13
4.4.4 Robustness and fuzz testing . 13
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4 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
4.4.5 White/Grey Box Vulnerability Scanning . 13
4.4.6 Container Image Vulnerability Scanning . 14
Annex A (informative): Generic NFV-MANO class description . 16
A.1 Overview . 16
A.2 Minimum set of functions defining Generic NFV-MANO class . 16
A.3 Generic model . 16
A.3.1 Generic NFV-MANO product model overview . 16
A.3.2 Functions defined by ETSI . 16
A.3.3 Other functions . 16
A.3.4 Operating System (OS) . 16
A.3.5 Interfaces . 17
Annex B (informative): Generic NFV-MANO assets and threats . 18
B.1 Introduction . 18
B.2 Generic critical assets . 18
B.3 Generic threats . 18
B.3.1 Generic threats format . 18
B.3.2 Threats relating to ETSI-defined interfaces and functions . 18
B.3.2.1 Weak cryptographic algorithms . 18
B.3.3 Spoofing identity . 19
B.3.3.1 Default Accounts . 19
B.3.3.2 Weak Password Policies . 19
B.3.3.3 Password peek . 19
B.3.3.4 Direct Root Access . 19
B.3.3.5 IP Spoofing . 19
B.3.3.6 Malware . 19
B.3.3.7 Eavesdropping . 19
B.3.4 Tampering . 19
B.3.4.1 Software Tampering . 19
B.3.4.2 Ownership File Misuse . 19
B.3.4.3 External Device Boot . 19
B.3.4.4 Log Tampering . 20
B.3.4.5 OAM Traffic Tampering . 20
B.3.4.6 File Write Permissions Abuse . 20
B.3.4.7 User Session Tampering . 20
B.3.5 Repudiation . 20
B.3.5.1 Lack of User Activity Trace . 20
B.3.6 Information disclosure . 20
B.3.6.1 Poor key generation . 20
B.3.6.2 Poor key management . 20
B.3.6.3 Weak cryptographic algorithms . 20
B.3.6.4 Insecure Data Storage . 20
B.3.6.5 System Fingerprinting. 20
B.3.6.6 Malware . 20
B.3.6.7 Personal Identification Information Violation . 21
B.3.6.8 Insecure Default Configuration. 21
B.3.6.9 File/Directory Read Permissions Misuse . 21
B.3.6.10 Insecure Network Services . 21
B.3.6.11 Unnecessary Services . 21
B.3.6.12 Log Disclosure . 21
B.3.6.13 Unnecessary Applications . 21
B.3.6.14 Eavesdropping . 21
B.3.6.15 Security threat caused by lack of generic NFV-MANO product traffic isolation . 21
B.3.7 Denial of service . 21
B.3.7.1 Compromised/Misbehaving User Equipments . 21
B.3.7.2 Implementation Flaw . 21
B.3.7.3 Insecure Network Services . 21
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5 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
B.3.7.4 Human Error . 21
B.3.8 Elevation of privilege . 22
B.3.8.1 Misuse by authorized users . 22
B.3.8.2 Over-Privileged Processes/Services . 22
B.3.8.3 Folder Write Permission Abuse . 22
B.3.8.4 Root-Owned File Write Permission Abuse . 22
B.3.8.5 High-Privileged Files . 22
B.3.8.6 Insecure Network Services . 22
B.3.8.7 Elevation of Privilege via Unnecessary Network Services . 22
Annex C (informative): Change History . 23
History . 24

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6 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
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 Web server (https://ipr.etsi.org/).
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.
Trademarks
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
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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7 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
1 Scope
The present document defines the security assurance of generic NFV-MANO products. The outcome of the present
document expects the security assets, security threats, security requirements and test cases for evaluating the generic
security of NFV-MANO 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 NFV-MANO 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 at
https://docbox.etsi.org/Reference/.
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 TS 133 117: "Universal Mobile Telecommunications System (UMTS); LTE; 5G; Catalogue
of general security assurance requirements (3GPP TS 33.117)".
[2] ETSI GS NFV-SOL 013: "Network Functions Virtualisation (NFV) Release 3; Protocols and Data
Models; Specification of common aspects for RESTful NFV MANO APIs".
[3] ETSI GS NFV-SEC 022: "Network Functions Virtualisation (NFV) Release 2; Security; Access
Token Specification for API Access".
[4] IETF RFC 5246: "The Transport Layer Security (TLS) Protocol Version 1.2".
[5] IETF RFC 8446: "The Transport Layer Security (TLS) Protocol Version 1.3".
[6] ETSI TS 133 210: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal
Mobile Telecommunications System (UMTS); LTE; 5G; Network Domain Security (NDS); IP
network layer security (3GPP TS 33.210)".
[7] ETSI GS NFV-SEC 012: "Network Functions Virtualisation (NFV) Release 3; Security; System
architecture specification for execution of sensitive NFV components".
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 TR 133 926: "LTE; 5G; Security Assurance Specification (SCAS) threats and critical assets
in 3GPP network product classes (3GPP TR 33.926)".
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8 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
[i.2] ETSI GR NFV 003: "Network Functions Virtualisation (NFV); Terminology for Main Concepts in
NFV".
[i.3] ETSI TR 133 916: "LTE; 5G; Security Assurance Methodology (SCAM) for 3GPP network
products (3GPP TR 33.916)".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in ETSI GR NFV 003 [i.2] and the following apply:
Basic Vulnerability Testing (BVT): process of running security tools against a network product
NOTE: BVT is defined by the use of Free and Open Source Software (FOSS) and Commercial Off-The-Shelf
(COTS) security testing tools on the external interfaces of the network product.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI GR NFV 003 [i.2] and the following apply:
CVE Common Vulnerabilities and Exposures
4 Catalogue of security requirements and related test
cases for generic part of NFV-MANO products
4.1 Introduction
The present clause describes security functional requirements and the corresponding test cases for generic part of
NFV-MANO products.
4.2 Security functional requirements and related test cases
4.2.1 Introduction
The present clause describes the security functional requirements and the corresponding test cases, independent of a
specific NFV-MANO product class. In particular the proposed security requirements are classified in two groups:
- Security functional requirements deriving from ETSI specifications and detailed in clause 4.2.2.
- General security functional requirements which include requirements not already addressed in the ETSI
specifications but whose support is also important to ensure a NFV-MANO product conforms to a common
security baseline detailed in clause 4.2.3.
By default all test cases in clause 4.2 of ETSI TS 133 117 [1] can be applied to generic NFV-MANO products. Any
additions, deletions or modification are listed separately from clause 4.2.2 to clause 4.2.6.
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9 ETSI GS NFV-SEC 028 V5.1.1 (2024-05)
4.2.2 Security functional requirements on the NFV-MANO deriving from
ETSI specifications and related test cases
4.2.2.1 Sec
...