Check Point Advisories

Malicious Activity Over DNS Tunneling

Vulnerability
Protection

Check Point Reference:	CPAI-2019-1464
Date Published:	26 Nov 2019
Severity:	High
Last Updated:	Tuesday 26 November, 2019
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	DNS Tunneling is used to pass non-DNS information using DNS messages, which are normally allowed by security devices. Malicious users or malware may use DNS tunnels to bypass inspection by the security gateway.

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 Malicious Activity 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: Malicious Activity Over DNS Tunneling