Check Point Advisories

Microsoft Graphics Filters TIFF Image Converter Buffer Overflow (MS10-105; CVE-2010-3949; CVE-2010-3950)

Vulnerability
Protection

Check Point Reference:	CPAI-2010-328
Date Published:	14 Dec 2010
Severity:	High
Last Updated:	Tuesday 14 December, 2010
Source:
Industry Reference:	CVE-2010-3949 CVE-2010-3950
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	Tagged Image File Format (TIFF) is a container format for storing images, including photographs and line art. A buffer overflow vulnerability has been discovered in the way that Microsoft Office parses specially crafted TIFF image files. The vulnerability is due to an error in Microsoft Office TIFF Image Converter that fails to properly convert data from Big Endian format to the Little Endian format while parsing TIFF image files. A remote attacker may trigger this issue by convincing a user to open an Office document containing a specially crafted TIFF 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 TIFF 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 TIFF Image Converter Buffer Overflow (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 TIFF image converter buffer overflow (MS10-105)