UBUNTU-CVE-2021-28831

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    UBUNTU-CVE-2021-28831

    Published: 19 Mar 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-28831

    Summary:

    Details: decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

    References: https://ubuntu.com/security/CVE-2021-28831, https://ubuntu.com/security/notices/USN-5179-1, https://ubuntu.com/security/notices/USN-5179-2, https://ubuntu.com/security/notices/USN-6335-1, https://www.cve.org/CVERecord?id=CVE-2021-28831

    Affected packages

    Package

    Name: busybox

    Purl: pkg:deb/ubuntu/busybox@1:1.21.0-1ubuntu1.4+esm1?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:1.21.0-1ubuntu1.4+esm1

    Affected versions

    1:1.20.0-8.1ubuntu1
    1:1.20.0-9ubuntu1
    1:1.20.0-9ubuntu2

    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-2021-28831 | CVE-DB