CVE-2022-21723

Name: CVE-2022-21723
Creator: NVD / NIST
Published: 2022-01-27T00:15:07.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 4.48%

Last modified Jun 17, 2026

CVE-2022-21723 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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 versions 2.11.1 and prior, parsing an incoming SIP message that contains a malformed multipart can potentially cause out-of-bound read access. EPSS estimates a 4.48% chance of exploitation in the next 30 days.

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 versions 2.11.1 and prior, parsing an incoming SIP message that contains a malformed multipart can potentially cause out-of-bound read access. This issue affects all PJSIP users that accept SIP multipart. The patch is available as commit in the `master` branch. There are no known workarounds.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

4.48%

90.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Teluu	Pjsip	<= 2.11.1
Asterisk	Certified Asterisk	16.8.0
Sangoma	Asterisk	>= 16.0.0, < 16.24.1
Sangoma	Asterisk	>= 18.0.0, < 18.10.1
Sangoma	Asterisk	>= 19.0.0, < 19.2.1
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

http://packetstormsecurity.com/files/166227/Asterisk-Project-Security-Advisory-AST-2022-006.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2022/Mar/2Mailing List, Patch, Third Party Advisory
https://github.com/pjsip/pjproject/commit/077b465c33f0aec05a49cd2ca456f9a1b112e896Patch, Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-7fw8-54cv-r7pmPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://security.gentoo.org/glsa/202210-37Third Party Advisory
https://www.debian.org/security/2022/dsa-5285Third Party Advisory
http://packetstormsecurity.com/files/166227/Asterisk-Project-Security-Advisory-AST-2022-006.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2022/Mar/2Mailing List, Patch, Third Party Advisory
https://github.com/pjsip/pjproject/commit/077b465c33f0aec05a49cd2ca456f9a1b112e896Patch, Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-7fw8-54cv-r7pmPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html
https://security.gentoo.org/glsa/202210-37Third Party Advisory
https://www.debian.org/security/2022/dsa-5285Third Party Advisory

Timeline

Published: Jan 27, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21723?

How severe is CVE-2022-21723?

CVE-2022-21723 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 4.48% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21723?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21723?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST