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 up to and including 2.11.1 when in a dialog set (or forking) scenario, a hash key shared by multiple UAC dialogs can potentially be prematurely freed when one of the dialogs is destroyed . The issue may cause a dialog set to be registered in the hash table multiple times (with different hash keys) leading to undefined behavior such as dialog list collision which eventually leading to endless loop. A patch is available in commit db3235953baa56d2fb0e276ca510fefca751643f which will be included in the next release. There are no known workarounds for this issue.
https://github.com/pjsip/pjproject/security/advisories/GHSA-ffff-m5fm-qm62
https://github.com/pjsip/pjproject/commit/db3235953baa56d2fb0e276ca510fefca751643f
http://seclists.org/fulldisclosure/2022/Mar/1
http://packetstormsecurity.com/files/166226/Asterisk-Project-Security-Advisory-AST-2022-005.html
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
https://lists.debian.org/debian-lts-announce/2022/03/msg00040.html
https://security.gentoo.org/glsa/202210-37
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
Source: MITRE
Published: 2022-02-22
Updated: 2023-02-02
Type: CWE-416
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
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL