Check Point Advisories

Microsoft Windows Ancillary Driver Elevation of Privilege (MS11-046; CVE-2011-1249)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-290
Date Published:	14 Jun 2011
Severity:	High
Last Updated:	Tuesday 14 June, 2011
Source:
Industry Reference:	CVE-2011-1249
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	The Windows kernel is the core of the operating system. It provides system-level services such as device management and memory management, allocates processor time to processes, and manages error handling. An elevation of privilege vulnerability exists in the Ancillary Function Driver (afd.sys) due to Windows improperly validating input passed from user mode to the kernel. The vulnerability could allow an attacker to run code with elevated privileges. A local attacker who successfully exploited this vulnerability could execute arbitrary code and take complete control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

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 Ancillary Driver Elevation of Privilege (MS11-046) 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 ancillary driver elevation of privilege (MS11-046)