CVE-2021-32686 Information

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 PJSIP before version 2.11.1 there are a couple of issues found in the SSL socket. First a race condition between callback and destroy due to the accepted socket having no group lock. Second the SSL socket parent/listener may get destroyed during handshake. Both issues were reported to happen intermittently in heavy load TLS connections. They cause a crash resulting in a denial of service. These are fixed in version 2.11.1.

CVSS Vector

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

Reference

https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wr https://github.com/pjsip/pjproject/pull/2716 https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664cd https://github.com/pjsip/pjproject/releases/tag/2.11.1 https://www.debian.org/security/2021/dsa-4999 https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.9