Check Point Advisories

PHP7 Unserialization Use After Free

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0692
Date Published:	4 Aug 2016
Severity:	Critical
Last Updated:	Monday 08 August, 2016
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	unserialize function of the ArrayObject from the SPL in php7 webserver
Vulnerability Description	A Use-After-Free vulnerability exists in the Standard PHP library's unserializion of array objects, due to an internal array self-reference. An attacker could exploit this vulnerability by supplying crafted input to a PHP application. Successful exploitation may result in remote execution of arbitrary code on the affected system.

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 PHP7 Unserialization 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: PHP7 Unserialization Use After Free