Out-of-bounds Read Affecting pjproject package, versions *


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
2.19% (81st percentile)

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  • Snyk IDSNYK-UBUNTU1804-PJPROJECT-2326006
  • published21 Mar 2026
  • disclosed22 Dec 2021

Introduced: 22 Dec 2021

CVE-2021-43804  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:18.04 pjproject.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pjproject package and not the pjproject package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

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 Base Scores

version 3.1