Race Condition Affecting gdm-pam-extensions-devel package, versions *


Severity

Recommended
low

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.23% (14th percentile)

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  • Snyk IDSNYK-RHEL7-GDMPAMEXTENSIONSDEVEL-1399267
  • published26 Jul 2021
  • disclosed11 Dec 2020

Introduced: 11 Dec 2020

CVE-2020-27837  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 gdm-pam-extensions-devel.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gdm-pam-extensions-devel package and not the gdm-pam-extensions-devel package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1