Bug 1227098 (CVE-2015-3213)

Summary:	CVE-2015-3213 Gnome clutter: screenlock bypass by performing certain mouse gestures
Product:	[Other] Security Response	Reporter:	Kurt Seifried <kseifried>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jrusnack, otaylor, rstrode, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A flaw was found in the way clutter processed certain mouse and touch gestures. An attacker could use this flaw to bypass the screen lock.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-07-27 23:43:05 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1227103, 1227104
Bug Blocks:	1227100

Description Kurt Seifried 2015-06-01 22:52:37 UTC

Ray Strode of Red Hat reports:

Clutter contains APIs for recognizing finger and mouse movement based gestures.
GNOME Shell uses these APIs to recognize when the user lifts the "screen shield"
to initiate the screen unlock process (where a password would normally be 
entered). 

A bug in clutter's gesture handling code leads to a crash in some cases when 
the user performs gestures. This crash can lead to screen lock bypass. The bug 
was fixed upstream in clutter 1.16.2

External reference:
https://bugzilla.gnome.org/show_bug.cgi?id=749847

Comment 4 errata-xmlrpc 2015-07-27 22:27:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:1510 https://rhn.redhat.com/errata/RHSA-2015-1510.html