Check Point Advisories

OpenSSL Handshake Sequence Cipher Suite Use-After-Free (CVE-2011-3210)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-171
Date Published:	10 May 2012
Severity:	High
Last Updated:	Thursday 10 May, 2012
Source:
Industry Reference:	CVE-2011-3210
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A use-after-free vulnerability has been reported in OpenSSL. The vulnerability is due to an error in the way the server handles handshake requests arriving in a certain order. A remote attacker could exploit this vulnerability by sending a malicious handshake sequence to a target server. Successful exploitation could result in arbitrary code execution, in the context of the affected application.

Protection Overview

IPS will detect and block malicious handshake requests sent to the TLS/SSL server.

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 OpenSSL Handshake Sequence Cipher Suite 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: OpenSSL Enforcement Violation.
Attack Information: OpenSSL Handshake Sequence Cipher Suite Use-After-Free