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Bug 1380450 - (CVE-2016-7568) CVE-2016-7568 gd, php: Integer overflow in gdImageWebpCtx
CVE-2016-7568 gd, php: Integer overflow in gdImageWebpCtx
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160902,repor...
: Security
Depends On: 1380452 1380453
Blocks: 1380454
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Reported: 2016-09-29 12:00 EDT by Adam Mariš
Modified: 2016-10-03 11:06 EDT (History)
18 users (show)

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Doc Text:
An integer overflow flaw, leading to a heap-based buffer overflow, was found in gd. A specially crafted image, when converted to webp, could cause the application to crash or potentially execute arbitrary code.
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Last Closed: 2016-09-30 00:08:01 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2016-09-29 12:00:19 EDT 
An integer overflow vulnerability was found in function gdImageWebpCtx of file gd_webp.c in libgd. It could lead to heap buffer overflow. Both PHP 7.0.10 and libgd 2.2.3 were affected.

PHP bug:

https://bugs.php.net/bug.php?id=73003

PHP patch:

https://github.com/php/php-src/commit/c18263e0e0769faee96a5d0ee04b750c442783c6

libgd bug:

https://github.com/libgd/libgd/issues/308

libgd patch:

https://github.com/libgd/libgd/commit/40bec0f38f50e8510f5bb71a82f516d46facde03

CVE assignment:

http://seclists.org/oss-sec/2016/q3/639
Comment 1 Adam Mariš 2016-09-29 12:04:26 EDT 
Created gd tracking bugs for this issue:

Affects: fedora-all [bug 1380453]
Comment 2 Adam Mariš 2016-09-29 12:04:37 EDT 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1380452]
Comment 3 Doran Moppert 2016-09-29 23:44:40 EDT 
This vulnerability is only present if gd is build against libwebp.  Fedora does so, but no Red Hat Enterprise Linux versions of gd do.
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