CVE-2022-39269: Media transport downgrade from the secure version (SRTP) to non-secure (RTP) in pjsip

First published: Thu Oct 06 2022(Updated: )

PJSIP is a free and open source multimedia communication library written in C. When processing certain packets, PJSIP may incorrectly switch from using SRTP media transport to using basic RTP upon SRTP restart, causing the media to be sent insecurely. The vulnerability impacts all PJSIP users that use SRTP. The patch is available as commit d2acb9a in the master branch of the project and will be included in version 2.13. Users are advised to manually patch or to upgrade. There are no known workarounds for this vulnerability.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Pjsip Pjsip	>=2.11<2.13
debian/asterisk	<=1:16.2.1~dfsg-1+deb10u2	1:16.28.0~dfsg-0+deb10u4 1:16.28.0~dfsg-0+deb11u3 1:20.5.2~dfsg+~cs6.13.40431414-1
debian/ring		20190215.1.f152c98~ds1-1+deb10u1 20190215.1.f152c98~ds1-1+deb10u2 20210112.2.b757bac~ds1-1 20230206.0~ds2-1.1 20230922.0~ds2-1

Remedy

https://github.com/pjsip/pjproject/commit/d2acb9af4e27b5ba75d658690406cec9c274c5cc

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