Check Point Advisories

Internet Explorer Improper Ref Counting Use After Free (MS12-077; CVE-2012-4787)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-1252
Date Published:	11 Dec 2012
Severity:	Critical
Last Updated:	Tuesday 15 January, 2013
Source:
Industry Reference:	CVE-2012-4787
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description	A remote code execution vulnerability has been reported in Internet Explorer. The vulnerability is due to an error in the way Internet Explorer accesses an object that has not been correctly initialized or has been deleted. A remote attacker can exploit this issue by enticing a target user to open a specially crafted web page. Successful exploitation would allow an attacker to take complete control of the target.

Protection Overview

This protection will detect and block attempts to open a specially crafted HTML page.

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

In the IPS tab, click Protections and find the Internet Explorer Improper Ref Counting Use After Free (MS12-077) 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: Internet Explorer improper ref counting use after free (MS12-077)