Check Point Advisories

SSH Over DNS Tunneling

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1508
Date Published:	1 May 2014
Severity:	High
Last Updated:	Tuesday 28 March, 2017
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Servers
Vulnerability Description	SSH over DNS tunneling can be used by attackers to disclose unauthorized information. A remote attacker can use DNS tunneling methods to circumvent security products.

Protection Overview

This protection will detect and block attempts to bypass security inspection via certain SSH over DNS tunneling methods.

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 SSH Over DNS Tunneling 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: Tunneling Detection.
Attack Information: SSH Over DNS Tunneling