UBUNTU-CVE-2021-3502

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    UBUNTU-CVE-2021-3502

    Published: 7 May 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-3502
    Aliases:
    USN-5008-1

    Summary:

    Details: A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability.

    References: https://ubuntu.com/security/CVE-2021-3502, https://github.com/lathiat/avahi/pull/324, https://ubuntu.com/security/notices/USN-5008-1, https://www.cve.org/CVERecord?id=CVE-2021-3502

    Affected packages

    Package

    Name: avahi

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.8-5ubuntu4

    Affected versions

    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-2021-3502 | CVE-DB