Check Point Advisories

Mozilla Firefox ConstructFrame With Floating First-letter Memory Corruption (CVE-2009-2462)

Check Point Reference: CPAI-2009-409
Date Published: 31 May 2010
Severity: High
Last Updated: Thursday 12 January, 2012
Source:
Industry Reference:CVE-2009-2462
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 vulnerability is reported in Mozilla Firefox web browser. The vulnerability is due to an implementation error when handling the first letter frame. A remote attacker can exploit this vulnerability by enticing the target user to open a malicious web page. In an attack scenario, where arbitrary code is injected and executed on the target system, the behavior of the target is dependent on the intention of the malicious code. The injected code will be run with privileges of the currently logged on user. If such an attack is not executed successfully, the vulnerable application may terminate as a result of invalid memory access.

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 ConstructFrame With Floating First-letter 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 ConstructFrame with floating first-letter memory corruption

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