Check Point Advisories

Microsoft Graphics Filters CGM Image Converter Buffer Overrun (MS10-105; CVE-2010-3945; CVE-2012-2524)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-337
Date Published:	14 Dec 2010
Severity:	High
Last Updated:	Tuesday 04 November, 2014
Source:
Industry Reference:	CVE-2010-3945 CVE-2012-2524
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	Computer Graphics Metafile (CGM) is a free and open international standard file format for 2D vector graphics, raster graphics, and text. A remote code execution vulnerability has been discovered in the way that Microsoft Office allocates buffer size when handling CGM image files. The vulnerability is due to an error in Microsoft Office CGM Image Converter that fails to properly allocate buffer sizes in memory. A remote attacker may trigger this issue by convincing a user to open an Office document containing a specially crafted CGM image file. By persuading a user to open the malformed file, an attacker could take complete control of an affected system.

Protection Overview

This protection will detect and block the transferring of malformed CGM 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 / R71 / R70 / R65

In the IPS tab, click Protections and find the Microsoft Graphics Filters CGM Image Converter Buffer Overrun (MS10-105) 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 graphics filters CGM image converter buffer overrun (MS10-105)