Check Point Advisories

Internet Explorer HTML Decoding Memory Corruption (CVE-2006-2382)

Check Point Reference: CPAI-2006-249
Date Published: 4 Jul 2010
Severity: High
Last Updated: Sunday 04 July, 2010
Source:
Industry Reference:CVE-2006-2382
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Microsoft Internet Explorer (IE) is the most widely used web browser application. The browser supports various languages as well as most of the known character sets. Character sets define the character encoding used in an HTML page. Languages that have more characters than the ASCII set defines need a multi byte character set to be able to encode all the characters in order to be displayed by the browser. There exists a heap buffer overflow vulnerability in Microsoft Internet Explorer. The flaw is caused by an improper decoding of UTF-8 encoded HTML files. An attacker can exploit this vulnerability by enticing a user to open a crafted HTML file, resulting in possible injection and execution of arbitrary code on the target system with the privileges of the currently logged-in user. In case of an attack where code injection is not successful, the affected browser will terminate abnormally. In case of an attack where code injection and execution is successful, the behavior of the host system is dependent on the intended purpose of the injected code. It is likely that the vulnerable browser will stop functioning or terminate as a result.

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

  1. In the IPS tab, click Protections and find the Internet Explorer HTML Decoding Memory Corruption protection using the Search tool and Edit the protection's settings.
  2. 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 HTML Decoding Memory Corruption

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