[SA22280] PHP "_ecalloc" Integer Overflow Vulnerability

TITLE:
PHP "_ecalloc" Integer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA22280

VERIFY ADVISORY:
http://secunia.com/advisories/22280/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
PHP 5.1.x
http://secunia.com/product/6796/

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

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/

Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.