USN-5008-1

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    USN-5008-1

    Published: 7 Jul 2021Last Modified: 22 Apr 2026

    Summary: avahi vulnerabilities

    Details: Thomas Kremer discovered that Avahi incorrectly handled termination signals on the Unix socket. A local attacker could possibly use this issue to cause Avahi to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2021-3468) It was discovered that Avahi incorrectly handled certain hostnames. A local attacker could possibly use this issue to cause Avahi to crash, resulting in a denial of service. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. (CVE-2021-3502)

    References: https://ubuntu.com/security/notices/USN-5008-1, https://ubuntu.com/security/CVE-2021-3468, https://ubuntu.com/security/CVE-2021-3502

    Affected packages

    Package

    Name: avahi

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.7-3.1ubuntu1.3

    Affected versions

    0.6.32-1ubuntu1

    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
    USN-5008-1 | CVE-DB