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    CVE-2020-27837

    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.

    Published:Dec 11, 2020
    Last Modified:Nov 21, 2024
    EPS:Dec 28, 2020
    EPSS Score:0.00056
    CVSS Score:6.4

    Affected Products

    Vendor
    Gnome
    Product
    Gnome Display Manager

    Exploits

    No exploit reference

    Related CVEs

    CVE-2020-16125 (CVSS 7.2) — gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice…
    CVE-2019-3825 (CVSS 6.3) — A vulnerability was discovered in gdm before 3.31.4. When timed login is enabled in configuration, an attacker…
    CVE-2018-14424 (CVSS 7.8) — The daemon in GDM through 3.29.1 does not properly unexport display objects from its D-Bus interface when they…
    CVE-2017-12164 (CVSS 4.1) — A flaw was discovered in gdm 3.24.1 where gdm greeter was no longer setting the ran_once boolean during autolo…
    CVE-2016-1000002 (CVSS 2.4) — gdm3 3.14.2 and possibly later has an information leak before screen lock…
    CVE-2015-7496 (CVSS 7.2) — GNOME Display Manager (gdm) before 3.18.2 allows physically proximate attackers to bypass the lock screen by h…
    CVE-2013-4169 (CVSS 6.9) — GNOME Display Manager (gdm) before 2.21.1 allows local users to change permissions of arbitrary directories vi…
    CVE-2013-7273 (CVSS 2.1) — GNOME Display Manager (gdm) 3.4.1 and earlier, when disable-user-list is set to true, allows local users to ca…
    CVE-2010-2387 (CVSS 1.9) — vicious-extensions/ve-misc.c in GNOME Display Manager (gdm) 2.20.x before 2.20.11, when GDM debug is enabled, …

    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