Check Point Advisories

Weak SSL RC4 Cipher Suites (CVE-2013-2566; CVE-2015-2808)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0571
Date Published:	17 May 2015
Severity:	N/A
Last Updated:	Sunday 03 December, 2017
Source:
Industry Reference:	CVE-2013-2566 CVE-2015-2808
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70
Who is Vulnerable?	SSL Servers
Vulnerability Description	RC4 is a widely supported stream cipher, often preferred by TLS servers and other servers using encrypted sessions. It has long been known to have a variety of cryptographic weaknesses. Recent cryptanalysis results, one of which is the "Bar Mitzvah attack", exploit biases in the RC4 keystream to recover repeatedly encrypted plaintexts. As a result, RC4 can no longer be seen as providing a sufficient level of security for encrypted sessions.

Protection Overview

This protection will detect and block SSL and TLS connections using weak RC4 cipher suites.

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 / R71 / R70

In the IPS tab, click Protections and find the Weak SSL RC4 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 RC4 Cipher Suites