Check Point Advisories

NAT Slipstream Bypass Attempt

Vulnerability
Protection

Check Point Reference:	CPAI-2020-1185
Date Published:	11 Nov 2020
Severity:	Critical
Last Updated:	Wednesday 11 November, 2020
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	NAT Slipstreaming allows an attacker to remotely access any TCP/UDP services bound to a victim machine, bypassing the victim's NAT/firewall (arbitrary firewall pinhole control). A remote attacker can exploit this vulnerability by enticing a user to visit a specially crafted web page.

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 NAT Slipstream Bypass Attempt 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: Content Protection Violation.
Attack Information: NAT Slipstream Bypass Attempt