Check Point Advisories

PHP Core Unserialize Key Name Code Execution (CVE-2015-0231)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0166
Date Published:	16 Feb 2015
Severity:	Critical
Last Updated:	Monday 16 February, 2015
Source:	PHP
Industry Reference:	CVE-2015-0231
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	PHP Group PHP prior to 5.4.37 PHP Group PHP prior to 5.5.21 PHP Group PHP prior to 5.6.5
Vulnerability Description	A code execution vulnerability has been reported in PHP core. The vulnerability is due to a use after free error when handling serialized objects with identical number key names within the unserialize() function. A remote attacker can exploit the vulnerability by sending crafted serialized data to a web application running a vulnerable version of PHP.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the PHP Core Unserialize Key Name Code Execution protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: PHP Core Unserialize Key Name Code Execution