CVE-2021-43804

high

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.

References

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

https://security.gentoo.org/glsa/202210-37

https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html

https://www.debian.org/security/2022/dsa-5285

Details

Source: MITRE

Published: 2021-12-22

Updated: 2023-02-02

Type: CWE-125

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 7.3

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

Impact Score: 3.4

Exploitability Score: 3.9

Severity: HIGH