CVE-2021-32686

5.9 MEDIUM
Published: July 23, 2021 Modified: November 04, 2025

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664cd
Source: security-advisories@github.com
Patch Third Party Advisory
https://github.com/pjsip/pjproject/pull/2716
Source: security-advisories@github.com
Patch Third Party Advisory
https://github.com/pjsip/pjproject/releases/tag/2.11.1
Source: security-advisories@github.com
Release Notes Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wr
Source: security-advisories@github.com
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
Source: security-advisories@github.com
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-37
Source: security-advisories@github.com
Third Party Advisory
https://www.debian.org/security/2021/dsa-4999
Source: security-advisories@github.com
Third Party Advisory
https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664cd
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://github.com/pjsip/pjproject/pull/2716
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://github.com/pjsip/pjproject/releases/tag/2.11.1
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wr
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-37
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.debian.org/security/2021/dsa-4999
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

15 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.9 / 10.0
EPSS (Exploit Probability)
1.7%
82th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

debian teluu