UBUNTU-CVE-2021-38171

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    UBUNTU-CVE-2021-38171

    Published: 21 Aug 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-38171

    Summary:

    Details: adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.

    References: https://ubuntu.com/security/CVE-2021-38171, https://github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6, https://patchwork.ffmpeg.org/project/ffmpeg/patch/AS8P193MB12542A86E22F8207EC971930B6F19@AS8P193MB1254.EURP193.PROD.OUTLOOK.COM/, https://ubuntu.com/security/notices/USN-5472-1, https://www.cve.org/CVERecord?id=CVE-2021-38171, https://ubuntu.com/security/notices/USN-5167-1

    Affected packages

    Package

    Name: ffmpeg

    Purl: pkg:deb/ubuntu/ffmpeg@7:2.8.17-0ubuntu0.1+esm4?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -7:2.8.17-0ubuntu0.1+esm4

    Affected versions

    7:2.7.2-1build1

    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-2021-38171 | CVE-DB