ETSI TS 103 596-2 V1.1.1 (2021-05)

ETSI TS 103 596-2 V1.1.1 (2021-05)






TECHNICAL SPECIFICATION
Methods for Testing and Specification (MTS);
Test Specification for CoAP;
Part 2: Security Tests

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2 ETSI TS 103 596-2 V1.1.1 (2021-05)

Reference
DTS/MTS-TSTCoAP-2
Keywords
security, testing

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ETSI

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3 ETSI TS 103 596-2 V1.1.1 (2021-05)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 6
3.3 Abbreviations . 6
4 Security Test Objectives . 7
5 Security testing techniques (preliminary consideration) . 7
5.1 Fuzz Testing . 7
5.1.1 General Description . 7
5.1.2 Example Approach . 7
5.1.3 CoAP-specific Considerations . 8
5.2 Penetration Testing . 9
5.3 Testing for vulnerabilities . 9
5.4 Further approaches . 9
6 Test Configurations . 10
7 CoAP Security Test Purposes . 10
7.0 Introduction . 10
7.1 Authentication/authorization . 11
7.2 Encryptions. 12
7.3 Specific protocol security considerations . 12
8 Vulnerability Test Samples . 12
Annex A (informative): Sample security test catalogue . 14
A.1 Introduction . 14
History . 15


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4 ETSI TS 103 596-2 V1.1.1 (2021-05)
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.
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Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Methods for Testing and
Specification (MTS).
The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [4].
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.
Introduction
The present document provides an introduction and guide for developers and users investigating in security testing of
the COAP communication protocol. It will be a reference base for both client side test campaigns and server side test
campaigns addressing the security issues. It belongs to a multi-part deliverable addressing the most relevant testing
aspects of COAP: conformance, security and performance testing. While the conformance testing part presents a
complete set of test purposes, the content for security and performance parts is different and focus on evaluating
relevant testing techniques and the provision of samples that are specific for COAP. For this reason, the structure of the
present document consists of four main clauses: the first two clauses address the security test objectives, techniques and
methods to be considered for COAP. Concrete practical hints and samples and configuration notes are provided where
feasible. The latter two clauses focus on the security mechanisms and implementation notes mentioned in the COAP
protocol standard and security vulnerabilities known from relevant vulnerability databases. Concrete test purposes have

been described using the Test Description Language (TDL) standardized by ETSI.
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5 ETSI TS 103 596-2 V1.1.1 (2021-05)
1 Scope
The present document provides general security considerations and guidelines about the Constrained Application
Protocol (CoAP). The collective ideas presented in the present document are enriched with example Test Purposes
(TPs) to outline possible implementations.
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] IETF RFC 7252: "The Constrained Application Protocol (CoAP)".
[2] ETSI ES 203 119-4: "Methods for Testing and Specification (MTS); The Test Description
Language (TDL); Part 4: Structured Test Objective Specification (Extension)".
[3] IETF RFC 8323: "CoAP (Constrained Application Protocol) over TCP, TLS, and WebSockets".
[4] ETSI TS 103 596-1: "Methods for Testing and Specification (MTS); Test Specification for CoAP;
Part 1: Conformance Tests".
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] Eclipse IoT-Testware v.0.1.0.
NOTE: Available at https://projects.eclipse.org/projects/technology.iottestware.
[i.2] ETSI ES 202 951: "Methods for Testing and Specification (MTS); Model-Based Testing (MBT);
Requirements for Modelling Notations".
[i.3] ETSI TS 103 646: "Methods for Testing and Specification (MTS); Test specification for
foundational Security IoT-Profile".
[i.4] IEC 62443-4-2: "Security for industrial automation and control systems. Technical security
requirements for IACS components".
[i.5] CVE-2018-14367.
NOTE: Available at https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14367.
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6 ETSI TS 103 596-2 V1.1.1 (2021-05)
[i.6] CVE-2019-12101.
NOTE: Available at https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12101.
[i.7] ETSI TR 101 583: "Methods for Testing and Specification (MTS); Security Testing; Basic
Terminology".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
black-box testing: testing activity conducted without knowledge of the internal structure of the system under test
grey-box testing: testing activity conducted with a partial knowledge of the internal structure of a system under test
System Under Test (SUT): real open system in which the implementation under test resides
NOTE: Definition of term from ETSI ES 202 951 [i.2].
white-box testing: testing based on an analysis of the internal structure of the component or
...