PHP "gdPngReadData()" Truncated PNG Data Denial of Service - Advisories

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PHP "gdPngReadData()" Truncated PNG Data Denial of Service

Secunia Advisory:	SA25378
Release Date:	2007-05-22
Last Update:	2007-06-01

Critical:	Less critical
Impact:	DoS
Where:	From remote
Solution Status:	Partial Fix

Software:	PHP 4.3.x PHP 4.4.x PHP 5.0.x PHP 5.1.x PHP 5.2.x

CVE reference:	CVE-2007-2756 (Secunia mirror)



Description: Xavier Roche has reported a vulnerability in PHP, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to the incorrect use of libpng within the function "gdPngReadData()" in ext/gd/libgd/gd_png.c of the GD extension when processing truncated data. This can be exploited to cause an infinite loop by e.g. tricking an application to process a specially crafted file. The vulnerability is reported in versions 4.4.7 and 5.2.2. Other versions may also be affected. Solution: Update to version 5.2.3. http://www.php.net/downloads.php#v5 Fixed in the CVS repository. http://viewcvs.php.net/viewvc.cgi/gd/...?r1=1.22&r2=1.23&pathrev=HEAD Provided and/or discovered by: Xavier Roche Changelog: 2007-06-01: Updated "Solution" section. Added link to "Original Advisory" section. Original Advisory: PHP: http://www.php.net/releases/5_2_3.php http://bugs.libgd.org/?do=details&task_id=86



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise. Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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