Check Point Advisories

PHP OpenSSL Extension X.509 Certificate Memory Corruption (CVE-2013-6420)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-3759
Date Published:	26 Dec 2013
Severity:	Critical
Last Updated:	Thursday 15 May, 2014
Source:
Industry Reference:	CVE-2013-6420
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A code execution vulnerability has been reported in PHP. The vulnerability is due to a memory corruption error when handling a malicious ASN.1 data type for a timestamp in an X.509 certificate. A remote attacker can exploit this flaw by sending a malicious certificate.

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 OpenSSL Extension X.509 Certificate Memory Corruption 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 OpenSSL Extension X.509 Certificate Memory Corruption