Check Point Advisories

PHP 7 Unserialization Hash Table Resize Use After Free

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0813
Date Published:	18 Oct 2016
Severity:	Critical
Last Updated:	Tuesday 18 October, 2016
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	PHP 7
Vulnerability Description	A Use After Free vulnerability exists in PHP 7. A remote attacker can exploit this vulnerability by sending specially crafted input to the unserialize() function.

Protection Overview

This protection detects 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 7 Unserialization Hash Table Resize Use After Free 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 7 Unserialization Hash Table Resize Use After Free