UBUNTU-CVE-2019-20044

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    UBUNTU-CVE-2019-20044

    Published: 24 Feb 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-20044
    Aliases:
    USN-5325-1

    Summary:

    Details: In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the --no-PRIVILEGED option. Zsh fails to overwrite the saved uid, so the original privileges can be restored by executing MODULE_PATH=/dir/with/module zmodload with a module that calls setuid().

    References: https://ubuntu.com/security/CVE-2019-20044, https://www.zsh.org/mla/zsh-announce/141, https://ubuntu.com/security/notices/USN-5325-1, https://www.cve.org/CVERecord?id=CVE-2019-20044

    Affected packages

    Package

    Name: zsh

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.1.1-1ubuntu2.3+esm1

    Affected versions

    5.1.1-1ubuntu1
    5.1.1-1ubuntu2
    5.1.1-1ubuntu2.1
    5.1.1-1ubuntu2.2
    5.1.1-1ubuntu2.3

    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-2019-20044 | CVE-DB