Check Point Advisories

Microsoft Internet Explorer MHTML URI Buffer Overflow (CVE-2006-2766)

Vulnerability
Protection

Check Point Reference:	CPAI-2006-246
Date Published:	14 Feb 2010
Severity:	Medium
Last Updated:	Sunday 29 January, 2017
Source:
Industry Reference:	CVE-2006-2766
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	There exists a buffer overflow vulnerability in the Microsoft Internet Explorer product. The flaw is caused by an improper check of the MHTML URI string. An attacker may exploit this vulnerability to cause a denial of service condition. A code execution attack is not possible as a stack integrity feature is present in the affected application. Upon exploitation, the affected application will terminate. There is no possibility of an attack resulting in code execution, thus termination is the only possibly outcome. Because the termination is unexpected, the stack protection mechanism might generate an error popup informing the user that the application shut down unexpectedly.

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 Internet Explorer MHTML URI 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: Web Client Enforcement Violation.
Attack Information: Microsoft Internet Explorer MHTML URI Buffer Overflow