UBUNTU-CVE-2021-21375

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    UBUNTU-CVE-2021-21375

    Published: 10 Mar 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-21375
    Aliases:
    USN-8122-1

    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 version 2.10 and earlier, after an initial INVITE has been sent, when two 183 responses are received, with the first one causing negotiation failure, a crash will occur. This results in a denial of service.

    References: https://ubuntu.com/security/CVE-2021-21375, https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365, https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvp, https://www.cve.org/CVERecord?id=CVE-2021-21375, https://ubuntu.com/security/notices/USN-8122-1

    Affected packages

    Package

    Name: pjproject

    Purl: pkg:deb/ubuntu/[email protected]+deb8u1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1

    Affected versions

    2.1.0.0.ast20130823-1
    2.1.0.0.ast20130823-1+deb8u1build0.16.04.1

    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
    UBUNTU-CVE-2021-21375 | CVE-DB