Check Point Advisories

Weak SSL DES Cipher Suites

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0407
Date Published:	24 Apr 2017
Severity:	N/A
Last Updated:	Monday 18 December, 2017
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	SSL Clients.
Vulnerability Description	DES is a widely supported stream cipher often preferred by TLS servers and other servers using encrypted sessions. Recent cryptanalysis results one of which is the SWEET32 exploit biases in the DES keystroke to recover repeatedly encrypted plain-texts. As a result DES can no longer be seen as providing a sufficient level of security for encrypted sessions.

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 Weak SSL DES Cipher Suites 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: SSL Enforcement Violation.
Attack Information: Weak SSL DES Cipher Suites