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PHP "gdPngReadData()" Truncated PNG Data Denial of Service
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Secunia Advisory:
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SA25378
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Release Date:
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2007-05-22
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Last Update:
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2007-06-01
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Popularity:
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9,627 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Partial Fix
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| Software: | PHP 4.3.x
PHP 4.4.x
PHP 5.0.x
PHP 5.1.x
PHP 5.2.x
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| CVE reference: | CVE-2007-2756
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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
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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