A vulnerability has been identified and fixed in php: The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders . The php-ini-5.3.8 package was missing with the MDVSA-2011:165 advisory and is now being provided, the php-timezonedb package was upgraded to the latest version for 2011. The updated packages have been patched to correct this issue.