UBUNTU-CVE-2021-42378

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    UBUNTU-CVE-2021-42378

    Published: 15 Nov 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-42378
    Aliases:
    USN-5179-1

    Summary:

    Details: A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function

    References: https://ubuntu.com/security/CVE-2021-42378, https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/, https://ubuntu.com/security/notices/USN-5179-1, https://www.cve.org/CVERecord?id=CVE-2021-42378

    Affected packages

    Package

    Name: busybox

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    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-2021-42378 | CVE-DB