Check Point Advisories

Microsoft Windows Help File Heap Buffer Overflow (CVE-2006-1591)

Vulnerability
Protection

Check Point Reference:	CPAI-2006-214
Date Published:	26 Jul 2010
Severity:	High
Last Updated:	Sunday 14 February, 2016
Source:
Industry Reference:	CVE-2006-1591
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	There exists a buffer overflow vulnerability in Microsoft Windows. The vulnerability is caused by the improper parsing of malformed .hlp file in the Windows Help system. An attacker may exploit this vulnerability by enticing a user to open a crafted Windows help file, which will enable the attacker to inject and execute arbitrary code within the security context of the target user. In an attack case where code injection is not successful, the vulnerable winhlp32.exe application will terminate immediately. In a more sophisticated attack where code injection results is successful, the behavior of the target is entirely dependent on the intended function of the injected code. The code 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 Help File Heap Buffer Overflow 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 Help file heap buffer overflow