Bug 1380450 (CVE-2016-7568) - CVE-2016-7568 gd, php: Integer overflow in gdImageWebpCtx
Summary: CVE-2016-7568 gd, php: Integer overflow in gdImageWebpCtx
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-7568
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1380452 1380453
Blocks: 1380454
TreeView+ depends on / blocked
 
Reported: 2016-09-29 16:00 UTC by Adam Mariš
Modified: 2019-09-29 13:57 UTC (History)
18 users (show)

Fixed In Version:
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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.
Clone Of:
Environment:
Last Closed: 2016-09-30 04:08:01 UTC
Embargoed:

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Description Adam Mariš 2016-09-29 16:00:19 UTC 
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 16:04:26 UTC 
Created gd tracking bugs for this issue:

Affects: fedora-all [bug 1380453]
Comment 2 Adam Mariš 2016-09-29 16:04:37 UTC 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1380452]
Comment 3 Doran Moppert 2016-09-30 03:44:40 UTC 
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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