DEBIAN-CVE-2020-27837

Advisory lineage Upstream: 1 Downstream: 0
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CVE-2020-27837
Published: 28 Dec 2020, 19:15
Last modified:19 Nov 2025, 02:01

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.4 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

28 Dec 2020, 19:15
Published
Vulnerability first disclosed
19 Nov 2025, 02:01
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•MEDIUM•Score: 6.4CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • debian•gdm3

    < 3.38.2.1-1 | < 3.38.2.1-1 | < 3.38.2.1-1 | < 3.38.2.1-1

References (1)