Bug 1342898 (CVE-2016-2831)

Summary: CVE-2016-2831 Mozilla: Entering fullscreen and persistent pointerlock without user permission (MFSA 2016-58)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jhorak, security-response-team, stransky
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2016-07-05 06:43:04 UTC Type: ---
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Bug Blocks: 1335788    

Description Huzaifa S. Sidhpurwala 2016-06-06 04:19:07 UTC 
Security researcher sushi Anton Larsson reported that when paired fullscreen and pointerlock requests are done in combination with closing windows, a pointerlock can be created within a fullscreen window without user permission. This pointerlock cannot then be cancelled without terminating the browser, resulting in a persistent denial of service attack. This can also used for spoofing and clickjacking attacks against the browser UI. 


External Reference:

https://www.mozilla.org/security/announce/2016/mfsa2016-58.html


Acknowledgements:

Name: the Mozilla project
Upstream: sushi Anton Larsson
Comment 1 errata-xmlrpc 2016-06-08 17:05:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 6

Via RHSA-2016:1217 https://access.redhat.com/errata/RHSA-2016:1217