Vulnerability Details : CVE-2021-20315
A locking protection bypass flaw was found in some versions of gnome-shell as shipped within CentOS Stream 8, when the "Application menu" or "Window list" GNOME extensions are enabled. This flaw allows a physical attacker who has access to a locked system to kill existing applications and start new ones as the locked user, even if the session is still locked.
Products affected by CVE-2021-20315
- cpe:2.3:a:gnome:gnome-shell:*:*:*:*:*:*:*:*
- cpe:2.3:o:centos:stream:8:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20315
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20315
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.6
|
LOW | AV:L/AC:L/Au:N/C:N/I:P/A:P |
3.9
|
4.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
0.9
|
5.2
|
NIST |
CWE ids for CVE-2021-20315
-
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2021-20315
-
https://bugzilla.redhat.com/show_bug.cgi?id=2006285
2006285 – (CVE-2021-20315) CVE-2021-20315 gnome-shell: locking protection bypass allow unauthorized user to kill existing applications or start new onesIssue Tracking;Third Party Advisory
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