LTE; Security assurance specification for the PGW network product class (3GPP TS 33.250 version 14.1.0 Release 14)

RTS/TSGS-0333250ve10

General Information

Status
Published
Publication Date
08-Oct-2019
Technical Committee
Current Stage
12 - Completion
Completion Date
09-Oct-2019
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ETSI TS 133 250 V14.1.0 (2019-10) - LTE; Security assurance specification for the PGW network product class (3GPP TS 33.250 version 14.1.0 Release 14)
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ETSI TS 133 250 V14.1.0 (2019-10)
TECHNICAL SPECIFICATION
LTE;
Security assurance specification
for the PGW network product class
(3GPP TS 33.250 version 14.1.0 Release 14)
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3GPP TS 33.250 version 14.1.0 Release 14 1 ETSI TS 133 250 V14.1.0 (2019-10)
Reference
RTS/TSGS-0333250ve10
Keywords
LTE,SECURITY
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3GPP TS 33.250 version 14.1.0 Release 14 2 ETSI TS 133 250 V14.1.0 (2019-10)
Intellectual Property Rights
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Legal Notice

This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).

The present document may refer to technical specifications or reports using their 3GPP identities. These shall be

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ETSI
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3GPP TS 33.250 version 14.1.0 Release 14 3 ETSI TS 133 250 V14.1.0 (2019-10)
Contents

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

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

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

Foreword ............................................................................................................................................................. 4

1 Scope ........................................................................................................................................................ 5

2 References ................................................................................................................................................ 5

3 Definitions and abbreviations ................................................................................................................... 5

3.1 Definitions .......................................................................................................................................................... 5

3.2 Abbreviations ..................................................................................................................................................... 6

4 PGW-specific security requirements and related test cases ..................................................................... 6

4.1 Introduction ........................................................................................................................................................ 6

4.2 PGW-specific security functional adaptations of requirements and related test cases ....................................... 6

4.2.1 Introduction................................................................................................................................................... 6

4.2.2 Security functional requirements on the PGW deriving from 3GPP specifications and related test

cases .............................................................................................................................................................. 6

4.2.2.1 Security functional requirements on the PGW deriving from 3GPP specifications – General

approach .................................................................................................................................................. 6

4.2.2.2 Per-user based packet filtering ................................................................................................................ 6

4.2.2.3 Charging ID Uniqueness ......................................................................................................................... 7

4.2.2.4 TEID UNIQUENESS.............................................................................................................................. 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 – unauthorized viewing .................................................................. 9

4.2.3.2.3 Protecting data and information in storage ........................................................................................ 9

4.2.3.2.4 Protecting data and information in transfer ....................................................................................... 9

4.2.3.2.5 Logging access to personal data ........................................................................................................ 9

4.2.3.3 Protecting availability and integrity ........................................................................................................ 9

4.2.3.4 Authentication and authorization ............................................................................................................ 9

4.2.3.5 Protecting sessions ................................................................................................................................ 10

4.2.3.5.1 Unpredictable GTP TEID ................................................................................................................................... 10

4.2.3.6 Logging ................................................................................................................................................. 11

4.2.4 Operating systems ....................................................................................................................................... 11

4.2.5 Web servers ................................................................................................................................................ 11

4.2.6 Network devices ......................................................................................................................................... 11

4.2.6.1 Protection of Data and Information ....................................................................................................... 11

4.2.6.2 Protecting availability and integrity ...................................................................................................... 11

4.2.6.3 IP Address reallocation interval ............................................................................................................ 11

4.2.6.4 MS/UE-Mutual Access Prevention ....................................................................................................... 12

4.3 PGW-specific adaptations of hardening requirements and related test cases ................................................... 13

4.3.1 Introduction................................................................................................................................................. 13

4.3.2 Technical baseline....................................................................................................................................... 13

4.3.3 Operating systems ....................................................................................................................................... 13

4.3.4 Web servers ................................................................................................................................................ 13

4.3.5 Network devices ......................................................................................................................................... 13

4.3.5.1 Traffic separation .................................................................................................................................. 13

4.3.5.2 User Plane Traffic Differentiation ......................................................................................................... 14

4.4 PGW-specific adaptations of basic vulnerability testing requirements and related test cases .......................... 15

Annex A (informative): Change history ............................................................................................... 16

History .............................................................................................................................................................. 17

ETSI
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3GPP TS 33.250 version 14.1.0 Release 14 4 ETSI TS 133 250 V14.1.0 (2019-10)
Foreword

This Technical Specification has been produced by the 3rd 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 33.250 version 14.1.0 Release 14 5 ETSI TS 133 250 V14.1.0 (2019-10)
1 Scope

The present document contains requirements and test cases that are specific to the PGW network product class. It refers

to the Catalogue of General Security Assurance Requirements and formulates specific adaptions of the requirements

and test cases given there, as well as specifying requirements and test cases unique to the PGW network product class.

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 Release specifications".
[3] 3GPP TS 33.117: "Catalogue of General Security Assurance Requirements".

[4] 3GPP TR 33.916: "Security assurance scheme for 3GPP network products for 3GPP network

product classes".

[5] 3GPP TS 33.401: "3GPP System Architecture Evolution (SAE); Security architecture".

[6] 3GPP TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal

Terrestrial Radio Access Network (E-UTRAN) access".
[7] 3GPP TS 33.102: "3G security; Security architecture".

[8] 3GPP TS 32.251: "Telecommunication management; Charging management; Packet Switched

(PS) domain charging".

[9] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".

[10] 3GPP TR 33.926: "Security Assurance Specification (SCAS) threats and critical assets in 3GPP

network product classes".
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].
ETSI
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3GPP TS 33.250 version 14.1.0 Release 14 6 ETSI TS 133 250 V14.1.0 (2019-10)
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].
4 PGW-specific security requirements and related test
cases
4.1 Introduction

The structure of the present document is aligned with TS 33.117[3] such that the PGW-specific adaptation of a generic

requirement in 33.117[3], clause 4, can be always found in clause 4 of present document.

The text on pre-requisites for testing in clause 4.1.2 of TS 33.117 [3] applies also to the present document.

4.2 PGW-specific security functional adaptations of
requirements and related test cases
4.2.1 Introduction
4.2.2 Security functional requirements on the PGW deriving from 3GPP
specifications and related test cases
4.2.2.1 Security functional requirements on the PGW deriving from 3GPP
specifications – General approach

In addition to the requirements and test cases in TS 33.117[3], clause 4.2.2, a PGW shall satisfy the following:

It is assumed for the purpose of the present SCAS that a PGW conforms to all mandatory security-related provisions

pertaining to a PGW in:
- 3GPP TS 33.401[5]: "EPS security architecture";

- other 3GPP specifications that make reference to TS 33.401[5] or are referred to from TS 33.401[5] (e.g. TS

23.401 [6], TS 23.060[9], etc.);
- 3GPP TS 32.251[8]: " Packet Switched (PS) domain charging".

Since the PDN GW is the gateway which terminates the SGi interface, the security procedures pertaining to the PGW

are typically related to gateway functions. For example:
- Per-user based packet filtering (by e.g. deep packet inspection).

- Every IP-CAN bearer shall be assigned a unique identity number for billing purposes. (i.e. the Charging Id).

- The TEID is a unique identifier within one IP address of a logical node.
4.2.2.2 Per-user based packet filtering
Requirement Name: Per-user based packet filtering
Requirement Reference: TS 23.401 [6], clause 4.4.3.3
ETSI
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3GPP TS 33.250 version 14.1.0 Release 14 7 ETSI TS 133 250 V14.1.0 (2019-10)

Requirement Description: This requirement is identical to per-user based packet filtering (by e.g. deep packet

inspection) as specified in TS 23.401, clause 4.4.3.3.
Threat References: TR 33.926 [10], clause B.2.3.1 Failure to assign uni
...

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