Check Point Advisories

OpenSSL tls_get_message_body Function init_msg Structure Use After Free (CVE-2016-6309)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-1089
Date Published:	6 Dec 2016
Severity:	Critical
Last Updated:	Thursday 12 January, 2017
Source:	OpenSSL 20160926
Industry Reference:	CVE-2016-6309
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	OpenSSL Project OpenSSL 1.1.0a
Vulnerability Description	A use-after-free vulnerability has been reported in the tls_get_message_body function of OpenSSL. A remote, unauthenticated attacker could exploit this vulnerability by sending a crafted message to the vulnerable server. Successful exploitation allows the attacker to execute arbitrary code on the system.

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 OpenSSL tls_get_message_body Function init_msg Structure 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 tls_get_message_body Function init_msg Structure Use After Free