Check Point Advisories

Suspicious Decimal IP Redirect

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0259
Date Published:	30 Mar 2017
Severity:	Critical
Last Updated:	Thursday 13 April, 2017
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Many exploit kits, when connecting to HTTP servers for malware download, use a non-dotted decimal IP literal as the server name. Using such notation may be indicative of malware download.

Protection Overview

This protection detects use of non-dotted decimal IP notation.

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 Suspicious Decimal IP Redirect 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: Web Client Enforcement Violation.
Attack Information: Suspicious Decimal IP Redirect