Check Point Advisories

Microsoft Windows Win32k Improper User Input Validation (MS11-012; CVE-2011-0086)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-083
Date Published:	13 Mar 2011
Severity:	High
Last Updated:	Sunday 13 March, 2011
Source:
Industry Reference:	CVE-2011-0086
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	The Windows kernel-mode driver (win32k.sys) is a kernel-mode device driver and is the kernel part of the Windows subsystem. It contains the window manager and the Graphics Device Interface (GDI). It also serves as a wrapper for DirectX support. An elevation of privilege vulnerability has been discovered in the way that Windows kernel-mode drivers validate data supplied from user mode to kernel mode. The vulnerability is caused when the Windows kernel-mode drivers do not properly validate input passed from user mode. An attacker could run a specially crafted application that could exploit the vulnerability and take complete control over the affected system.

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 / R71 / R70 / R65

In the IPS tab, click Protections and find the Microsoft Windows Win32k Improper User Input Validation (MS11-012) 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 Win32k improper user input validation (MS11-012)