Bug 1265769 (CVE-2015-4512)

Summary: CVE-2015-4512 Mozilla: Out-of-bounds read during 2D canvas display on Linux 16-bit color depth systems (MFSA 2015-107)
Product: [Other] Security Response Reporter: Prasad Pandit <ppandit>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cschalle, gecko-bugs-nobody, jhorak, stransky
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: 2015-09-24 16:33:11 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 1261782    

Description Prasad Pandit 2015-09-23 17:34:18 UTC 
Security researcher Francisco Alonso of the NowSecure Research Team used the
Address Sanitizer tool to discover an out-of-bounds read issue during 2D canvas
rendering. This was due to an issue in the cairo graphics library when surfaces
are created with 32-bit color depth but displayed on a 16-bit color depth
system, which is unsupported. This allows an attacker to read an amount of
random memory following the heap for the 16-bit surface leading to information
disclosure.

This issue is specific to Linux in certain configurations and does not
affect Windows or OS X systems.

External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2015-107/
Comment 1 Martin Prpič 2015-09-24 12:35:44 UTC 
Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Francisco Alonso of the NowSecure Research Team as the original reporter.
Comment 2 Martin Prpič 2015-09-24 16:33:11 UTC 
This issue was fixed in Firefox version 41.