UBUNTU-CVE-2021-26712

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    UBUNTU-CVE-2021-26712

    Published: 18 Feb 2021Last Modified: 17 Oct 2026
    Upstream:
    CVE-2021-26712

    Summary:

    Details: Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.

    References: https://ubuntu.com/security/CVE-2021-26712, http://packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.html, http://seclists.org/fulldisclosure/2021/Feb/59, https://downloads.asterisk.org/pub/security/, https://downloads.asterisk.org/pub/security/AST-2021-003.html, https://issues.asterisk.org/jira/browse/ASTERISK-29260, https://www.cve.org/CVERecord?id=CVE-2021-26712

    Affected packages

    Package

    Name: asterisk

    Purl: pkg:deb/ubuntu/asterisk?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1:16.2.1~dfsg-2build2
    1:16.2.1~dfsg-2build3
    1:16.2.1~dfsg-2ubuntu1

    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-2021-26712 | CVE-DB