Check Point Advisories

Microsoft Windows Explorer Invalid URL File Parsing Stack Overflow (CVE-2006-3351)

Vulnerability
Protection

Check Point Reference:	CPAI-2006-260
Date Published:	20 Oct 2009
Severity:	High
Last Updated:	Tuesday 20 October, 2009
Source:
Industry Reference:	CVE-2006-3351
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	The Microsoft Windows series of operating systems is one of the most popular systems in use on workstations, home computers, and servers. All versions of the OS include a graphical shell interface, called Windows Explorer. There exists a stack exhaustion vulnerability in Microsoft Windows Explorer. The flaw is caused by the improper parsing of URL strings contained within a .url file. An attacker can exploit this vulnerability by enticing a user to open a crafted .url file, resulting in abnormal termination of the affected program. The target application will usually terminate immediately as a result of an attack attempt. If the malicious file is stored on the Desktop of the active user, the application will continually read the file and terminate. In most cases, this renders the Windows operating system unusable until the file is manually removed.

Protection Overview

This protection will detect and block 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 Microsoft Windows Explorer Invalid URL File Parsing Stack Overflow 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: Microsoft Windows Explorer invalid URL file parsing stack overflow