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Liaison statement
Reply LS on SCTP-AUTH and DTLS

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State Posted
Submitted Date 2023-06-07
From Group 3GPP
From Contact Charles Eckel
To Group tsvwg
To Contacts Gorry Fairhurst <>
Marten Seemann <>
Cc Zaheduzzaman Sarker <>
Gorry Fairhurst <>
Marten Seemann <>
Charles Eckel <>
Transport Area Working Group Discussion List <>
Martin Duke <>
Response Contact Lionel Morand <>
Susanna Kooistra <>
Purpose For action
Deadline 2023-12-01 Action Needed
Attachments S3-233355_revision_of_S3-233054_SCTP-AUTH and DTLS
Liaisons referred by this one Updated LS to 3GPP regarding SCTP-AUTH and DTLS
Liaisons referring to this one DTLS for SCTP next steps and request for input
1 Overall description

SA3 would like to thank IETF Transport Area Working Group (TSVWG) for notifying
SA3 of the vulnerabilities related to SCTP-AUTH and DTLS over SCTP.

SA3 agrees that the vulnerabilities are serious – they are affecting
confidentiality, integrity, replay, and availability. Supporting DTLS over SCTP
in N2, Xn, F1, and E1 interfaces has been made mandatory from Release 15
onwards. Therefore, SA3’s understanding is that it is important to solve all
the security vulnerabilities, including the availability vulnerabilities. Since
the problem is related to the use of DTLS with SCTP, SA3’s understanding is
that the solution should be based on DTLS, and the solution should not rely on
unsupported DTLS features

SA3 kindly asks TSVWG to work on and publish a solution as soon as possible.

2 Actions
To: IETF Transport Area Working Group (TSVWG)
ACTION: SA3 kindly asks IETF Transport Area Working Group (TSVWG) to take the
above information into account and keep SA3 updated on TSVWG’s.

3 Dates of next TSG SA WG 3 meetings
SA3#112 14 - 18 August 2023     Goteborg, Sweden
SA3#113 6 - 10 November 2023    Chicago, USA