CVE-2021-37706

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 affected versions if the incoming STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. Users are advised to upgrade as soon as possible. There are no known workarounds.

References

https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984

https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865

http://seclists.org/fulldisclosure/2022/Mar/0

http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html

https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html

https://security.gentoo.org/glsa/202210-37

https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html

https://www.debian.org/security/2022/dsa-5285

Details

Risk Information

CVSS v2

CVSS v3