Vulnerability Details : 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.
Products affected by CVE-2020-27837
- cpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27837
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27837
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.4
|
MEDIUM | AV:L/AC:M/Au:N/C:P/I:P/A:P |
3.4
|
6.4
|
NIST | |
|
6.4
|
MEDIUM | CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
0.5
|
5.9
|
NIST |
CWE ids for CVE-2020-27837
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by: secalert@redhat.com (Primary)
References for CVE-2020-27837
-
https://bugzilla.redhat.com/show_bug.cgi?id=1906812
1906812 – (CVE-2020-27837) CVE-2020-27837 gdm: lock screen bypass when autologin is setIssue Tracking;Patch;Third Party Advisory
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