Check Point Advisories

TLS Invalid Cipher Suites Denial of Service

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1493
Date Published:	30 Apr 2014
Severity:	Critical
Last Updated:	Wednesday 30 April, 2014
Source:
Protection Provided by:	Security Gateway R77 R76 R75
Who is Vulnerable?	TLS 1.1 TLS 1.2
Vulnerability Description	A denial of service vulnerability has been reported in servers using TLS protocol. The vulnerability is due to the server's inability to handle Invalid TLS cipher suites. Remote attackers can exploit this issue by sending specially crafted cipher suites to an affected server.

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, Protection tab and select the version of your choice.

Security Gateway R77 / R76 / R75 / R71 / R70

In the IPS tab, click Protections and find the TLS Invalid Cipher Suites Denial of Service protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name:  SSL Enforcement Violation.
Attack Information:  TLS Invalid Cipher Suites Denial of Service