Universal Mobile Telecommunications System (UMTS); LTE; Catalogue of general security assurance requirements (3GPP TS 33.117 version 14.6.0 Release 14)

RTS/TSGS-0333117ve60

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Status
Published
Publication Date
08-Oct-2019
Technical Committee
Current Stage
12 - Completion
Completion Date
09-Oct-2019
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ETSI TS 133 117 V14.6.0 (2019-10) - Universal Mobile Telecommunications System (UMTS); LTE; Catalogue of general security assurance requirements (3GPP TS 33.117 version 14.6.0 Release 14)
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ETSI TS 133 117 V14.6.0 (2019-10)
TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Catalogue of general security assurance requirements
(3GPP TS 33.117 version 14.6.0 Release 14)
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3GPP TS 33.117 version 14.6.0 Release 14 1 ETSI TS 133 117 V14.6.0 (2019-10)
Reference
RTS/TSGS-0333117ve60
Keywords
LTE,SECURITY,UMTS
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3GPP TS 33.117 version 14.6.0 Release 14 2 ETSI TS 133 117 V14.6.0 (2019-10)
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Legal Notice

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ETSI
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3GPP TS 33.117 version 14.6.0 Release 14 3 ETSI TS 133 117 V14.6.0 (2019-10)
Contents

Intellectual Property Rights ................................................................................................................................ 2

Legal Notice ....................................................................................................................................................... 2

Modal verbs terminology .................................................................................................................................... 2

Foreword ............................................................................................................................................................. 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

3 Definitions and abbreviations ................................................................................................................... 6

3.1 Definitions .......................................................................................................................................................... 6

3.2 Abbreviations ..................................................................................................................................................... 7

4 Catalogue of security requirements and related test cases ....................................................................... 7

4.1 Introduction ........................................................................................................................................................ 7

4.1.1 Pre-requisites for testing ............................................................................................................................... 7

4.1.2 Use of tools in testing ................................................................................................................................... 7

4.1.3 Documentation Requirements ....................................................................................................................... 8

4.2 Security functional requirements and related test cases ..................................................................................... 8

4.2.1 Introduction................................................................................................................................................... 8

4.2.2 Security functional requirements deriving from 3GPP specifications and related test cases ........................ 8

4.2.2.1 Security functional requirements deriving from 3GPP specifications – general approach ..................... 8

4.2.3 Technical baseline......................................................................................................................................... 9

4.2.3.1 Introduction ............................................................................................................................................. 9

4.2.3.2 Protecting data and information .............................................................................................................. 9

4.2.3.2.1 Protecting data and information – general ......................................................................................... 9

4.2.3.2.2 Protecting data and information – Confidential System Internal Data ............................................... 9

4.2.3.2.3 Protecting data and information in storage ...................................................................................... 10

4.2.3.2.4 Protecting data and information in transfer ...................................................................................... 11

4.2.3.2.5 Logging access to personal data ...................................................................................................... 12

4.2.3.3 Protecting availability and integrity ...................................................................................................... 13

4.2.3.3.1 System handling during overload situations .................................................................................... 13

4.2.3.3.2 Boot from intended memory devices only ....................................................................................... 13

4.2.3.3.3 System handling during excessive overload situations .................................................................... 14

4.2.3.3.4 System robustness against unexpected input. .................................................................................. 15

4.2.3.3.5 Network Product software package integrity................................................................................... 16

4.2.3.4 Authentication and authorization .......................................................................................................... 17

4.2.3.4.1 Authentication policy ...................................................................................................................... 17

4.2.3.4.2 Authentication attributes.................................................................................................................. 20

4.2.3.4.2.1 Account protectionby at least one authentication attribute. ....................................................... 20

4.2.3.4.3 Password policy ............................................................................................................................... 23

4.2.3.4.4 Specific Authentication use cases .................................................................................................... 30

4.2.3.4.5 Policy regarding consecutive failed login attempts ......................................................................... 31

4.2.3.4.6 Authorization and access control ..................................................................................................... 33

4.2.3.5 Protecting sessions ................................................................................................................................ 35

4.2.3.5.1 Protecting sessions – logout function .............................................................................................. 35

4.2.3.5.2 Protecting sessions – Inactivity timeout .......................................................................................... 35

4.2.3.6 Logging ................................................................................................................................................. 36

4.2.3.6.1 Security event logging ..................................................................................................................... 36

4.2.3.6.2 Log transfer to centralized storage .................................................................................................. 38

4.2.3.6.3 Protection of security event log files ............................................................................................... 39

4.2.4 Operating systems ....................................................................................................................................... 40

4.2.4.1 General operating system requirements and related test cases .............................................................. 40

4.2.4.1.1 Availability and Integrity................................................................................................................. 40

4.2.4.1.2 Authentication and Authorization.................................................................................................... 44

4.2.4.2 UNIX® specific requirements and related test cases ............................................................................ 46

4.2.4.2.1 General ............................................................................................................................................ 46

4.2.4.2.2 System account identification .......................................................................................................... 46

ETSI
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3GPP TS 33.117 version 14.6.0 Release 14 4 ETSI TS 133 117 V14.6.0 (2019-10)

4.2.5 Web Servers ................................................................................................................................................ 46

4.2.5.1 HTTPS .................................................................................................................................................. 46

4.2.5.2 Logging ................................................................................................................................................. 47

4.2.5.2.1 Webserver logging ........................................................................................................................... 47

4.2.5.3 HTTP User sessions .............................................................................................................................. 47

4.2.5.4 HTTP input validation........................................................................................................................... 49

4.2.6 Network devices ......................................................................................................................................... 50

4.2.6.1 Protection of data and information ........................................................................................................ 50

4.2.6.2 Protecting availability and integrity ...................................................................................................... 50

4.2.6.2.1 Packet filtering................................................................................................................................. 50

4.2.6.2.2 Interface robustness requirements ................................................................................................... 51

4.2.6.2.3 GTP-C Filtering ............................................................................................................................... 51

4.2.6.2.4 GTP-U Filtering .................................................................................................................................... 54

4.3 Security requirements and related test cases related to hardening .................................................................... 56

4.3.1 Introduction................................................................................................................................................. 56

4.3.2 Technical Baseline ...................................................................................................................................... 56

4.3.2.1 No unnecessary or insecure services / protocols ................................................................................... 56

4.3.2.2 Restricted reachability of services ......................................................................................................... 58

4.3.2.3 No unused software ............................................................................................................................... 59

4.3.2.4 No unused functions .............................................................................................................................. 61

4.3.2.5 No unsupported components ................................................................................................................. 62

4.3.2.6 Remote login restrictions for privileged users....................................................................................... 63

4.3.2.7 Filesystem Authorization privileges ...................................................................................................... 64

4.3.3 Operating Systems ...................................................................................................................................... 65

4.3.3.1 General operating system requirements and test cases .......................................................................... 65

4.3.3.1.1 IP-Source address spoofing mitigation ............................................................................................ 65

4.3.3.1.2 Minimized kernel network functions ............................................................................................... 67

4.3.3.1.3 No automatic launch of removable media ....................................................................................... 71

4.3.3.1.4 SYN Flood Prevention .................................................................................................................... 72

4.3.3.1.5 Protection from buffer overflows .................................................................................................... 73

4.3.3.1.6 External file system mount restrictions ........................................................................................... 74

4.3.4 Web Servers ................................................................................................................................................ 75

4.3.4.1 General .................................................................................................................................................. 75

4.3.4.2 No system privileges for web server ..................................................................................................... 75

4.3.4.3 No unused HTTP methods .................................................................................................................... 76

4.3.4.4 No unused add-ons ................................................................................................................................ 77

4.3.4.5 No compiler, interpreter, or shell via CGI or other server-side scripting .............................................. 78

4.3.4.6 No CGI or other scripting for uploads................................................................................................... 79

4.3.4.7 No execution of system commands with SSI ........................................................................................ 79

4.3.4.8 Access rights for web server configuration ........................................................................................... 80

4.3.4.9 No default content ................................................................................................................................. 80

4.3.4.10 No directory listings .............................................................................................................................. 81

4.3.4.11 Web server information in HTTP headers ............................................................................................ 82

4.3.4.12 Web server information in error pages .................................................................................................. 83

4.3.4.13 Minimized file type mappings............................................................................................................... 83

4.3.4.14 Restricted file access ............................................................................................................................. 84

4.3.4.15 Execute rights exclusive for CGI/Scripting directory ........................................................................... 85

4.3.5 Network Devices ........................................................................................................................................ 85

4.3.5.1 Traffic Separation ................................................................................................................................. 85

4.4 Basic vulnerability testing requirements .......................................................................................................... 86

Annex A (informative): Change history ............................................................................................... 91

History .............................................................................................................................................................. 92

ETSI
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3GPP TS 33.117 version 14.6.0 Release 14 5 ETSI TS 133 117 V14.6.0 (2019-10)
Foreword

This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).

The contents of the present document are subject to continuing work within the TSG and may change following formal

TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an

identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.

y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,

updates, etc.

z the third digit is incremented when editorial only changes have been incorporated in the document.

ETSI
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3GPP TS 33.117 version 14.6.0 Release 14 6 ETSI TS 133 117 V14.6.0 (2019-10)
1 Scope

The present document contains objectives, requirements and test cases that are deemed applicable, possibly after

adaptation, to several network product classes.

Several network product classes share very similar if not identical security requirements for some aspects. Therefore,

these are collected in this "catalogue" document applicable to many network product classes. In addition to this

catalogue, requirements specific to different network product classes will be captured in separate documents.

2 References

The following documents contain provisions which, through reference in this text, constitute provisions of the present

document.

- References are either specific (identified by date of publication, edition number, version number, etc.) or

non-specific.
- For a specific reference, subsequent revisions do not apply.

- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including

a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same

Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TR 41.001: "GSM Specification set".

[3] IETF RFC 3871: "Operational Security Requirements for Large Internet Service Provider (ISP) IP

Network Infrastructure".

[4] 3GPP TR 33.926: "Security Assurance Specification (SCAS) threats and critical assets in 3GPP

network product classes".

[5] 3GPP TS 33.310: "Network Domain Security (NDS); Authentication Framework (AF)".

3 Definitions and abbreviations
3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following

apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP

TR 21.905 [1].

Machine Accounts: These will be used for authentication and authorization from system to system or between

applications on a system and cannot be assigned to a single person or a group of persons.

Personal data: any information relating to an identified or identifiable natural person ('data subject').

Identifiable person: one who can be identified, directly or indirectly, in particular by reference to an identification

number, name or to one or more factors specific to his physical, physiological, mental, economic, cultural or social

identity.
NOTE: personal data can be gathered from user data and traffic data.

Sensitive data: data that may be used for authentication or may help to identify the user, such as user names,

passwords, PINs, cryptographic keys, IMSIs, IMEIs, MSISDNs, or IP addresses of the UE, as well as files of a system

that are needed for the functionality such as firmware images, patches, drivers or kernel modules.

ETSI
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3GPP TS 33.117 version 14.6.0 Release 14 7 ETSI TS 133 117 V14.6.0 (2019-10)

System group account: a predefined system account in the network product, usually with special privileges, which has

a predefined user id and hence cannot be tied to a single user (individual) in a normal operating environment.

EXAMPLE: the 'root' account.
3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An

abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in

3GPP TR 21.905 [1].
CIS Center for Internet Security
4 Catalogue of security requirements and related test
cases
4.1 Introduction
4.1.1 Pre-requisites for testing

The SCAS tests, as described in the present specification, are to be applied to a network product whose software and

hardware has been brought into use so that the network product can provide the intended functionality, either in a real

network environment or in a simulated environment. This implies that, before any testing is performed, the hardware

and software has been installed correctly, the network product is powered on, and communication has been established

over all standardized interfaces and OAM interfaces related with the network product's functionality, as described in the

vendor's documentation.

Communication over external non standardized Interfaces that may exist and are marked as optional, according to the

vendor's documentation, shall also be established during testing unless they are explicitly marked as "not

recommended" in the vendor's documentation.

For each of the enabled external communication interfaces there may be various optional capabilities. During testing, all

such capabilities shall be enabled unless they are explicitly marked as "not recommended" in the vendor's

documentation.

In some cases a testcase might require configuration changes as part of the execution steps or pre-conditions. After such

test is executed and prior any further test execution it needs to be ensured that the state of the ToE is restored back in

the original state.

SCAS testing is not about security in operations and deployments. So, in particular, SCAS testing is independent of any

operator guidelines or considerations on specific deployment scenarios.
4.1.2 Use of tools in testing

The following text shall apply to all test cases described in the present document:

The present document takes into account that the landscape of testing tools evolves more rapidly than SCAS

specifications. It is therefore allowed that, for each requirement, the actual test carried out may deviate from the

stepwise description of the test case in the present document if the following conditions are fulfilled:

(1) The test is carried out by preferably using Commercial-of-the-Shelf (COTS) and Free-Open-Source-Software

(FOSS) tools that are available for other testers that may want to repeat the test. In case a tool not in any of these

two categories is used then evidence of the quality assurance of the tool needs to be provided. This applies only

to tools used to perform the actual test and not supportive tools needed for setting up the testing environment like

for example traffic generators/ simulators.
ETSI
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3GPP TS 33.117 version 14.6.0 Release 14 8 ETSI TS 133 117 V14.6.0 (2019-10)

In cases where a test lab is not able to obtain the necessary tools to perform the test, vendor proprietary test tools

may be used by the test lab as long the test tool is controlled under a suitable quality management system

(QMS). The test lab ensures that this QMS is in place in order to avail of a vendor’s test tool.

Additionally in cases where the accredited test lab does not have the necessary test environment to perform a

test, it shall be possible for the accredited test lab personnel to perform the test in a vendor's test lab. In such

cases the accredited lab should record details of test environment, test set-up used and how the test was

performed.

(2) The tester provides evidence, e.g. by referring to the documentation of the tool, that the tool is suitable to verify

the requirement, and the scope of testing is equal or larger to the one of the test case described in the present

document. The evidence needs to be sufficiently detailed for experts in the field of testing, not for the general

public.

(3) The tester provides evidence that the tool has been actually used for testing the network product (e.g. by

providing a trace).
4.1.3 Documentation Requirements
When a test case makes
...

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