Check Point Advisories

HTTP Suspicious SMB Redirection

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0470
Date Published:	14 Apr 2015
Severity:	Critical
Last Updated:	Tuesday 02 June, 2015
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Windows-based HTTP clients
Vulnerability Description	A vulnerability has been discovered in the way numerous Windows-based applications follow HTTP redirection messages. By enticing a user to connect to a malicious Web server or by using Man in the Middle techniques, an attacker might cause a vulnerable application to initiate an SMB connection to a malicious server, thus obtaining its SMB credentials. Although the credentials are encrypted to a degree, they can be decrypted using known methods.

Protection Overview

This protection will detect attempts to redirect an HTTP connection onto an SMB connection.

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 HTTP Suspicious SMB Redirection 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: HTTP Protocol Inspection.
Attack Information: HTTP Suspicious SMB Redirection