What is CVE-2020-27837?

CVE-2020-27837 is a medium-severity vulnerability in Gnome Display Manager, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.4/10. Published 2020-12-28.

How severe is CVE-2020-27837?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Gnome Display Manager

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.

Vulnerability class: Race Condition

EPSS: 0.002 (13.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Gnome Gnome_display_manager
N/a Gdm — versions prior to 3.38.2.1

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2020-27837?: CVE-2020-27837 is a medium-severity vulnerability in Gnome Display Manager, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.4/10. Published 2020-12-28.
How severe is CVE-2020-27837?: Medium severity. CVSS v3 base score is 6.4 out of 10.