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PHP "_ecalloc" Integer Overflow Vulnerability
Secunia Advisory: SA22280
Release Date: 2006-10-05
Popularity: 10,150 views

Critical:
Moderately critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Workaround

Software:PHP 5.1.x

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CVE reference:CVE-2006-4812


Description:
A vulnerability has been reported in PHP, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.

The vulnerability is caused due to an integer overflow within the "_ecalloc" function. This can potentially be exploited to execute arbitrary code via specially crafted requests if a PHP script allocates memory based on attacker supplied data.

Solution:
The vulnerability has been fixed in the CVS repository:
http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_alloc.c?r1=1.161&r2=1.162

Provided and/or discovered by:
Disclosed via vendor CVS commit.

Original Advisory:
http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_alloc.c?r1=1.161&r2=1.162


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