Check Point Advisories

Microsoft Internet Explorer Use After Free Remote Code Execution (MS15-124: CVE-2015-6148)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-1354
Date Published:	8 Dec 2015
Severity:	Critical
Last Updated:	Tuesday 08 December, 2015
Source:	Microsoft MS15-124
Industry Reference:	CVE-2015-6148
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Internet Explorer 9 Internet Explorer 10 Internet Explorer 11 Internet Explorer 11 on Windows 10
Vulnerability Description	A use after free vulnerability exists in Microsoft Internet Explorer. The vulnerability occurs when Internet Explorer attempts to retrieve the common ancestor for nodes that are already dead, resulting in dereferences to invalid pointers. A remote attacker can exploit this issue by enticing a target victim to open a specially crafted web page. Successful exploitation could cause memory corruption in a way that would allow attackers to execute code on the target.
Update/Patch Avaliable	Apply patches from: MS15-124

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

In the IPS tab, click Protections and find the Microsoft Internet Explorer Use After Free Remote Code Execution (MS15-124: CVE-2015-6148) 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 Use After Free Remote Code Execution (MS15-124: CVE-2015-6148)