Check Point Advisories

Microsoft Office Excel Record Parsing Use After Free (MS11-072; CVE-2011-1986)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-415
Date Published:	21 Oct 2012
Severity:	High
Last Updated:	Sunday 21 October, 2012
Source:
Industry Reference:	CVE-2011-1986
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 Microsoft Office Excel. The vulnerability is due to lack of validation of certain record structures while handling specially crafted Excel files. A remote attacker could trigger this vulnerability by enticing an unsuspecting user to open a webpage containing a malicious Excel file. Successful exploitation would allow an attacker to gain complete control over an affected system, in the security context of the local user.

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

In the IPS tab, click Protections and find the Microsoft Office Excel Record Parsing Use After Free (MS11-072) 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 Office Excel Record Parsing Use After Free (MS11-072)