Check Point Advisories

Mozilla Products Regular Expressions Heap Corruption (CVE-2006-4566)

Check Point Reference: CPAI-2006-296
Date Published: 15 Oct 2009
Severity: High
Last Updated: Thursday 15 October, 2009
Source:
Industry Reference:CVE-2006-4566
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description The Firefox web browser is an application designed for tasks related to browsing the web, such as displaying HTML encoded pages, downloading files, and so forth. The browser application has a built-in JavaScript interpreter which also allows client side scripting and is normally used for dynamic web content creation. There exists a memory corruption vulnerability in Mozilla Foundation's family of browser products. The flaw is caused by a heap-based buffer overflow when parsing crafted regular expressions. A remote attacker can exploit this vulnerability to execute arbitrary code in the security context of the target browser. In an attack case where code injection is not successful, the affected application will terminate abnormally. In a more sophisticated attack where code injection results might be successful, the behaviour 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. Due to the nature of this vulnerability, it is most likely that an attack attempt will result in the termination of the client browser.

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 Mozilla Products Regular Expressions Heap 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:  Mozilla products regular expressions heap corruption

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