Check Point Advisories

Internet Explorer COM Object Instantiation Memory Corruption (MS06-021; CVE-2006-1303)

Vulnerability
Protection

Check Point Reference:	CPAI-2006-250
Date Published:	27 Dec 2009
Severity:	High
Last Updated:	Sunday 27 December, 2009
Source:
Industry Reference:	CVE-2006-1303
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Microsoft Internet Explorer is the most widely used web browser application. The browser is capable of processing HTML, images, scripting languages, and various other popular Internet specifications. The browser is also compatible with Microsoft's Common Object Model (COM) scheme, whereby applications can register a library or an executable that provides a general interface to other applications in the system. Any application can instantiate a COM object without knowing many details about its behavior or requirements. There exists a heap memory corruption vulnerability in Microsoft Internet Explorer. The vulnerability is caused due to an improper instantiation of a COM object which can lead to memory corruption in the application. An attacker may leverage the vulnerability by enticing the target user to follow a malicious link to a crafted HTML page. In case of a simple attack, the affected Internet Explorer application will be terminated abnormally when the malicious page is opened, when the user navigates to a different page, or when the user closes the browser. In case of a sophisticated attack, where code injection and execution is successful, the behavior of the system is dependent on the nature of the injected code. Any code injected into the vulnerable component would execute in the security context of the currently logged in 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 Internet Explorer COM Object Instantiation Memory Corruption (MS06-021) 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: Web Client Enforcement Violation.
Attack Information: Microsoft Internet Explorer COM object instantiation memory corruption (MS06-021)