Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Teluu | Pjsip | < 2.11.1 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664PatchThird Party Advisory
- https://github.com/pjsip/pjproject/pull/2716PatchThird Party Advisory
- https://github.com/pjsip/pjproject/releases/tag/2.11.1Release NotesThird Party Advisory
- https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wrThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202210-37Third Party Advisory
- https://www.debian.org/security/2021/dsa-4999Third Party Advisory
- https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664PatchThird Party Advisory
- https://github.com/pjsip/pjproject/pull/2716PatchThird Party Advisory
- https://github.com/pjsip/pjproject/releases/tag/2.11.1Release NotesThird Party Advisory
- https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wrThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlMailing ListThird Party Advisory
- 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/2021/dsa-4999Third Party Advisory
FAQ
What is CVE-2021-32686?
CVE-2021-32686 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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,...
How severe is CVE-2021-32686?
CVE-2021-32686 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32686?
Check the references section above for vendor advisories and patch information. Affected products include: Teluu Pjsip, Debian Debian Linux.