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TITLE:
PHP "readwbmp()" Integer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA24814

VERIFY ADVISORY:
http://secunia.com/advisories/24814/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
PHP 5.2.x
http://secunia.com/product/13446/
PHP 5.1.x
http://secunia.com/product/6796/
PHP 5.0.x
http://secunia.com/product/3919/
PHP 4.4.x
http://secunia.com/product/5768/
PHP 4.3.x
http://secunia.com/product/922/

DESCRIPTION:
Ivan Fratric has reported a vulnerability in PHP, which potentially
can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an integer overflow within the
"readwbmp()" function in ext/gd/libgd/wbmp.c. This can be exploited
to e.g. cause a DoS by tricking a PHP script into loading a specially
crafted wbmp image.

The vulnerability is reported in version 5.2.1. Other versions may
also be affected.

SOLUTION:
Fixed in the CVS repository.
http://cvs.php.net/viewvc.cgi/php-src/ext/gd/libgd/wbmp.c?view=log

PROVIDED AND/OR DISCOVERED BY:
Ivan Fratric

ORIGINAL ADVISORY:
http://ifsec.blogspot.com/2007/04/php-521-wbmp-file-handling-integer.html

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