Red Hat Bugzilla – Bug 969996
CVE-2013-3735 php: DoS (memory exhaustion, application crash) via crafted function definition
Last modified: 2015-07-31 03:06:59 EDT
Common Vulnerabilities and Exposures assigned an identifier CVE-2013-3735 to the following vulnerability:
** DISPUTED ** The Zend Engine in PHP before 5.4.16 RC1, and 5.5.0 before RC2, does not properly determine whether a parser error occurred, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash) via a crafted function definition, as demonstrated by an attack within a shared web-hosting environment. NOTE: the vendor's http://php.net/security-note.php page says "for critical security situations you should be using OS-level security by running multiple web servers each as their own user id."
We do not consider memory safety hazards caused by malformed php scripts as a security issue. Also (as per upstream) OS-level security should be used to protect systems from memory exhaustion caused by php applications.