DEBIAN-CVE-2021-4034

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    DEBIAN-CVE-2021-4034

    Published: 28 Jan 2022Last Modified: 1 Sept 2026
    Upstream:
    CVE-2021-4034

    Summary:

    Details: A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.

    References: https://security-tracker.debian.org/tracker/CVE-2021-4034

    Affected packages

    Package

    Name: policykit-1

    Purl: pkg:deb/debian/policykit-1?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.105-31.1

    Affected versions

    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
    DEBIAN-CVE-2021-4034 | CVE-DB