Check Point Advisories

Mozilla Firefox XSL Transformation Memory Corruption - Ver2 (CVE-2009-1169)

Check Point Reference: CPAI-2015-0281
Date Published: 26 Mar 2015
Severity: High
Last Updated: 26 Mar 2015
Industry Reference:CVE-2009-1169
Protection Provided by:

Security Gateway
R77, R76, 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 exists in Mozilla Firefox. The flaw is due to insufficient validation while processing a malicious XSL stylesheet. A remote attacker can exploit this vulnerability by enticing the target user to open a crafted webpage. In a successful attack that arbitrary code being injected and executed on the vulnerable target host, the behaviourof the target system is dependent on the malicious code. Note that any code executed by the attacker runs withthe privileges of the logged in user. In an attack where code execution fails, the vulnerable application will terminate abnormally while parsing themalicious document.

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

Protection tab and select the version of your choice.

Security Gateway R77 / R76 / R75 / R71 / R70

  1. In the IPS tab, click Protections and find the Mozilla Firefox XSL Transformation Memory Corruption - Ver2 protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name:  Web Client Enforcement Violation.
Attack Information:  Mozilla Firefox XSL Transformation Memory Corruption - Ver2

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