Check Point Advisories

Mozilla Firefox JavaScript Engine Information Disclosure (CVE-2005-0989)

Check Point Reference: CPAI-2005-220
Date Published: 29 Oct 2009
Severity: High
Last Updated: Thursday 29 October, 2009
Source:
Industry Reference:CVE-2005-0989
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description The Mozilla web browser and its derivatives, Firefox, Netscape, and K-Meleon are applications designed for tasks related to browsing the web, such as displaying HTML encoded pages, downloading files, etc. These applications have a built in functionality to interpret JavaScript code. One of the features implemented in JavaScript is string parsing using regular expressions. In particular, JavaScript is capable of doing regular expression based pattern matching and substitution. A vulnerability exists in the JavaScript interpreter of the Mozilla web browser and its derivatives. The flaw is triggered when a specially constructed web page calls a certain function with specially crafted parameters. This vulnerability can be exploited to retrieve arbitrary information from heap memory. The target system will generally not exhibit any unusual behaviour as a result of a successful attack. An attack intending to collect information about a vulnerable system will generally transpire in a silent manner. In rare cases, the affected application may terminate unexpectedly as a result of an attack under certain circumstances.

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 Firefox JavaScript Engine Information Disclosure 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 Firefox Javascript engine information disclosure

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