Check Point Advisories

Microsoft Windows GDI EMF Image File Handling Stack Overflow (MS08-021; CVE-2008-1087)

Vulnerability
Protection

Check Point Reference:	CPAI-2008-054
Date Published:	8 Apr 2008
Severity:	Critical
Last Updated:	Tuesday 08 April, 2008
Source:
Industry Reference:	CVE-2008-1087
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	A remote code execution vulnerability has been reported in the way Microsoft GDI handles the filename parameter in EMF files. The Microsoft Windows graphics device interface (GDI) enables applications to use graphics and formatted text on the video display and on the printer. EMF is a image format used in many Windows programs including Internet Explorer and Outlook. The vulnerability is due to a stack overflow error when Microsoft GDI fails to properly process a malformed file name parameter in an EMF image files. By convincing a user to open a specially crafted image file, a remote attacker could cause a denial of service condition or execute arbitrary code on an affected system. Successful exploitation may allow execution of arbitrary code on a vulnerable system.

Protection Overview

This protection will detect and block the transferring of malformed EMF 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 Windows GDI EMF Image File Handling Stack Overflow (MS08-021) 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 Windows GDI EMF image file handling stack overflow (MS08-021)