Check Point Advisories

Microsoft Internet Explorer onreadystatechange Use After Free

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1834
Date Published:	21 Sep 2014
Severity:	High
Last Updated:	Tuesday 31 December, 2024
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Internet Explorer 9
Vulnerability Description	A use after free vulnerability exists in Microsoft Internet Explorer. A remote unauthenticated attacker could exploit this vulnerability by enticing the target user to open a specially crafted web page. Successful exploitation could lead to arbitrary code execution in the security context of the target user.

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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Microsoft Internet Explorer onreadystatechange Use After Free protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Client Enforcement Violation.
Attack Information: Microsoft Internet Explorer onreadystatechange Use After Free