Bug 1315571 (CVE-2016-1956)

Summary: CVE-2016-1956 Mozilla: Linux video memory DOS with Intel drivers (MFSA 2016-19)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2016-03-28 05:22:53 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On:    
Bug Blocks: 1313724    

Description Huzaifa S. Sidhpurwala 2016-03-08 06:04:45 UTC
Security researcher Ucha Gobejishvili reported a denial of service (DOS) attack when doing certain WebGL operations in a canvas requiring an unusually large amount buffer to be allocated from video memory. This resulted memory resource exhaustion with some Intel video cards, requiring the computer to be rebooted to return functionality. This was resolved by putting in additional checks on the amount of memory to be allocated during graphics processing.

This issue was limited to a subset of Intel drivers on Linux. Other operating systems were not affected.



External Reference:

https://www.mozilla.org/security/announce/2016/mfsa2016-19.html


Acknowledgements:

Name: the Mozilla project
Upstream: Ucha Gobejishvili

Statement:

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.