CVE-2021-43804: pjsip pjproject

Out-of-bounds read when parsing RTCP BYE message in PJSIP

CVSS 7.3 HighEPSS 0.023 · 83rd percentile

Published by the CVE Program (CNA: GitHub_M) at 22 Dec 2021, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
pjsip	pjproject	affected <= 2.11.1

Identifiers

CVE-2021-43804

CNA

GitHub_M

Weakness (CWE)

CWE-125

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.3	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.023, the 83rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 22 Dec 2021. New records show when each source confirmed them.

Sources

References from the CNA

github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9
github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e
lists.debian.org/debian-lts-announce/2022/03/msg00035.html mailing-list
security.gentoo.org/glsa/202210-37 vendor-advisory
lists.debian.org/debian-lts-announce/2022/11/msg00021.html mailing-list
www.debian.org/security/2022/dsa-5285 vendor-advisory
lists.debian.org/debian-lts-announce/2023/08/msg00038.html mailing-list

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.