USN-4797-1

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    USN-4797-1

    Published: 4 May 2022Last Modified: 29 Jun 2026

    Summary: libass vulnerabilities

    Details: It was discovered that LibASS incorrectly handled certain ASS files. A remote attacker could possibly use this issue to cause a denial of service. One of the issues, CVE-2016-7970, only affected Ubuntu 16.04 ESM. (CVE-2016-7969, CVE-2016-7970, CVE-2016-7972) It was discovered that LibASS incorrectly handled parsing operations for specific nested character strings. An attacker could possibly use this issue to cause a denial of service. This issue was only fixed in Ubuntu 16.04 LTS. (CVE-2020-24994)

    References: https://ubuntu.com/security/notices/USN-4797-1, https://ubuntu.com/security/CVE-2016-7969, https://ubuntu.com/security/CVE-2016-7970, https://ubuntu.com/security/CVE-2016-7972, https://ubuntu.com/security/CVE-2020-24994

    Affected packages

    Package

    Name: libass

    Purl: pkg:deb/ubuntu/libass?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.10.1-3ubuntu1+esm1

    Affected versions

    0.10.1-1ubuntu1
    0.10.1-3
    0.10.1-3ubuntu1

    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