CVE-2021-32686

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    CVE-2021-32686

    Published: 23 Jul 2021Last Modified: 9 Jul 2026

    Summary:

    Details: 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.

    References: https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html, https://github.com/pjsip/pjproject/releases/tag/2.11.1, https://github.com/pjsip/pjproject/security/advisories/GHSA-cv8x-p47p-99wr, https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html, https://security.gentoo.org/glsa/202210-37, https://www.debian.org/security/2021/dsa-4999, https://github.com/pjsip/pjproject/commit/d5f95aa066f878b0aef6a64e60b61e8626e664cd, https://github.com/pjsip/pjproject/pull/2716

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -513700f74787009241a11eda125284277f7dfc1c

    Affected versions

    2.11

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-32686 | CVE-DB