UBUNTU-CVE-2021-23239

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    UBUNTU-CVE-2021-23239

    Published: 12 Jan 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-23239
    Aliases:
    USN-4705-1

    Summary:

    Details: The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.

    References: https://ubuntu.com/security/CVE-2021-23239, https://www.openwall.com/lists/oss-security/2021/01/11/2, https://ubuntu.com/security/notices/USN-4705-1, https://www.cve.org/CVERecord?id=CVE-2021-23239

    Affected packages

    Package

    Name: sudo

    Purl: pkg:deb/ubuntu/[email protected]+esm8?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.8.6p3-0ubuntu3
    1.8.8-2ubuntu1
    1.8.8-2ubuntu2
    1.8.9p4-1ubuntu1
    1.8.9p4-1ubuntu2
    1.8.9p5-1ubuntu1
    1.8.9p5-1ubuntu1.1
    1.8.9p5-1ubuntu1.2
    1.8.9p5-1ubuntu1.3
    1.8.9p5-1ubuntu1.4
    1.8.9p5-1ubuntu1.5+esm1
    1.8.9p5-1ubuntu1.5+esm2
    1.8.9p5-1ubuntu1.5+esm3
    1.8.9p5-1ubuntu1.5+esm5
    1.8.9p5-1ubuntu1.5+esm6
    1.8.9p5-1ubuntu1.5+esm7
    1.8.9p5-1ubuntu1.5+esm8

    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-2021-23239 | CVE-DB