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

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Release Date:  2007-05-22    Last Update:  2007-06-01    Views:  15,346

Secunia Advisory SA25378

Where:

From remote

Impact:

DoS

Solution Status:

Partial Fix

CVE Reference(s):

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.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Xavier Roche

Original Advisory:
PHP:
http://www.php.net/releases/5_2_3.php

http://bugs.libgd.org/?do=details&task_id=86

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

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

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