Check Point Advisories

Illegal TCP Options

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1335
Date Published:	8 Apr 2014
Severity:	Critical
Last Updated:	Tuesday 08 April, 2014
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Web servers
Vulnerability Description	TCP packet options may contain illegal values. Attackers can use specially crafted TCP packets for remote network attacks.

Protection Overview

IPS will detect and prevent the transferring of specially crafted TCP packets.

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 Illegal TCP Options 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: TCP Enforcement Violation.
Attack Information: Illegal TCP Options