UBUNTU-CVE-2018-7738

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    UBUNTU-CVE-2018-7738

    Published: 7 Mar 2018Last Modified: 22 Apr 2026
    Upstream:
    CVE-2018-7738
    Aliases:
    USN-4512-1

    Summary:

    Details: In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.

    References: https://ubuntu.com/security/CVE-2018-7738, https://ubuntu.com/security/notices/USN-4512-1, https://www.cve.org/CVERecord?id=CVE-2018-7738

    Affected packages

    Package

    Name: util-linux

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.31.1-0.4ubuntu3.7

    Affected versions

    2.30.1-0ubuntu4
    2.30.2-0.1ubuntu1
    2.30.2-0.1ubuntu2
    2.30.2-0.1ubuntu3

    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