High severity7.3NVD Advisory· Published Dec 22, 2021· Updated Jun 17, 2026
CVE-2021-43804
CVE-2021-43804
Description
PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming RTCP BYE message contains a reason's length, this declared length is not checked against the actual received packet size, potentially resulting in an out-of-bound read access. This issue affects all users that use PJMEDIA and RTCP. A malicious actor can send a RTCP BYE message with an invalid reason length. Users are advised to upgrade as soon as possible. There are no known workarounds.
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Affected products
6Patches
Vulnerability mechanics
References
8- github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1envdPatchThird Party Advisory
- github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9nvdPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202210-37nvdThird Party Advisory
- www.debian.org/security/2022/dsa-5285nvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/08/msg00038.htmlnvd
- lists.debian.org/debian-lts-announce/2024/09/msg00030.htmlnvd
News mentions
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