Check Point Advisories

Microsoft Windows itss.dll CHM File Handling Heap Corruption (CVE-2006-2297)

Vulnerability
Protection

Check Point Reference:	CPAI-2006-195
Date Published:	13 Jan 2010
Severity:	High
Last Updated:	Wednesday 13 January, 2010
Source:
Industry Reference:	CVE-2006-2297
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Microsoft Windows operating systems contain numerous libraries that facilitate the processing of the many file formats that are recognized by standard Windows installations. One such file format is the Microsoft compiled help files, known as CHM. A vulnerability exists in the Microsoft Windows Infotech Storage Library. The flaw is created due to a lack of verification of a user supplied value, before using it as the size argument in a memory allocation call. Exploitation of this flaw may result in process flow diversion of the vulnerable application. In case of an attack where code injection is not successful, the vulnerable application using the affected library will terminate immediately. In case of a more sophisticated attack where code injection is successful, the behavior of the target is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security context of the current 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

In the IPS tab, click Protections and find the Microsoft Windows itss.dll CHM File Handling Heap Corruption 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 itss.dll CHM file handling heap corruption