Bug 2006285 (CVE-2021-20315)

Summary: CVE-2021-20315 gnome-shell: locking protection bypass allow unauthorized user to kill existing applications or start new ones
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: adscvr, fmuellner, gnome-sig, jadahl, otaylor, philip.wyett, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: gnome-shell 3.32.2-40.el8 Doc Type: If docs needed, set a value
Doc Text:
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.
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-11-10 01:51:02 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1999758, 2006699    
Bug Blocks: 2002738, 2006774    

Description Marian Rehak 2021-09-21 11:56:19 UTC
When locking the screen the application menu bar and the window list at the bottom of the screen are visible. The user has the ability to kill open windows and also start applications when the machine is locked.

Comment 1 Riccardo Schirone 2021-09-21 15:33:23 UTC

Comment 3 Riccardo Schirone 2021-09-21 15:43:24 UTC
This issue was only ever present in Centos 8 Stream, in particular in gnome-shell-3.32.2-39.el8.x86_64 . No released RHEL version was ever affected by this.

Comment 6 Riccardo Schirone 2021-09-22 08:25:40 UTC
This issue was introduced as part of backporting the feature in https://bugzilla.redhat.com/show_bug.cgi?id=1651378 .

Comment 10 Product Security DevOps Team 2021-11-10 01:51:00 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):