DEBIAN-CVE-2020-27837

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    DEBIAN-CVE-2020-27837

    Published: 28 Dec 2020Last Modified: 11 Sept 2026
    Upstream:
    CVE-2020-27837

    Summary:

    Details: A flaw was found in GDM in versions prior to 3.38.2.1. A race condition in the handling of session shutdown makes it possible to bypass the lock screen for a user that has autologin enabled, accessing their session without authentication. This is similar to CVE-2017-12164, but requires more difficult conditions to exploit.

    References: https://security-tracker.debian.org/tracker/CVE-2020-27837

    Affected packages

    Package

    Name: gdm3

    Purl: pkg:deb/debian/gdm3?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.38.2.1-1

    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-2020-27837 | CVE-DB