CVE-2021-43804 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Reference

https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9 https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

LOW

Base Severity

7.3