Check Point Advisories

Microsoft Office Excel Record Type Confusion (MS11-045; CVE-2011-1273)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-162
Date Published:	24 Apr 2012
Severity:	High
Last Updated:	Tuesday 04 March, 2014
Source:
Industry Reference:	CVE-2011-1273
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A remote code execution vulnerability has been reported in Microsoft Office Excel. The vulnerability is due to improper parsing of certain records leading to type confusion while handling specially crafted Excel files. A remote attacker may exploit this issue by convincing a target user to open a specially crafted Excel file with an affected version of Excel. Successful exploitation would allow an attacker to take complete control of the target system.

Protection Overview

This protection will detect and block the transferring of malformed Excel files over HTTP.

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 Office Excel Record Type Confusion (MS11-045) 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 type confusion (MS11-045)