Check Point Advisories

Mozilla Firefox Browser CSS style Engine Memory Corruption (CVE-2009-1392)

Check Point Reference: CPAI-2009-396
Date Published: 25 Jul 2010
Severity: High
Last Updated: Monday 26 March, 2012
Source:
Industry Reference:CVE-2009-1392
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Mozilla Firefox is a web browser developed by Mozilla Foundation. The browser is capable of interpreting and rendering many types of content published on the Internet, including various versions of HTML, XML, XUL, JavaScript, various graphics formats, and so on. The browser runs on the Windows, Macintosh, Unix and Linux based platforms. A memory corruption exists vulnerability in Mozilla Firefox. This flaw is due to the way Mozilla Firefox handles first-letter CSS style elements. A remote attacker can exploit this vulnerability by persuading a target user to open a malicious webpage. Successful attacks could allow for arbitrary code injection and execution within the security privileges of the currently logged on user. If code execution is successful, the behavior of the target will depend on the intention of the attacker. In an attack case where code execution is unsuccessful, Firefox may terminate abnormally.

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 Browser CSS style Engine 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:  Mozilla Firefox Browser CSS style Engine Memory Corruption

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