CVE-2021-43845

8.2 HIGH
Published: December 27, 2021 Modified: November 04, 2025

Description

PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859
Source: security-advisories@github.com
Patch Third Party Advisory
https://github.com/pjsip/pjproject/pull/2924
Source: security-advisories@github.com
Exploit Issue Tracking Patch Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh
Source: security-advisories@github.com
Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-37
Source: security-advisories@github.com
Third Party Advisory
https://www.debian.org/security/2022/dsa-5285
Source: security-advisories@github.com
Third Party Advisory
https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://github.com/pjsip/pjproject/pull/2924
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Issue Tracking Patch Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-37
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.debian.org/security/2022/dsa-5285
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

17 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.2 / 10.0
EPSS (Exploit Probability)
0.3%
54th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

debian teluu