Bug 1265769 - (CVE-2015-4512) CVE-2015-4512 Mozilla: Out-of-bounds read during 2D canvas display on Linux 16-bit color depth systems (MFSA 2015-107)
CVE-2015-4512 Mozilla: Out-of-bounds read during 2D canvas display on Linux 1...
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On:
Blocks: 1261782
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Reported: 2015-09-23 13:34 EDT by Prasad J Pandit
Modified: 2015-09-24 12:42 EDT (History)
4 users (show)

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Doc Type: Bug Fix
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Last Closed: 2015-09-24 12:33:11 EDT
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Description Prasad J Pandit 2015-09-23 13:34:18 EDT
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

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

External Reference:

Comment 1 Martin Prpič 2015-09-24 08:35:44 EDT

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 12:33:11 EDT
This issue was fixed in Firefox version 41.

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