Check Point Advisories

Microsoft Silverlight Double-Free Remote Code Execution (MS12-034; CVE-2012-0176)

Vulnerability
Protection

Check Point Reference:	CPAI-2012-199
Date Published:	8 May 2012
Severity:	Critical
Last Updated:	Thursday 18 April, 2024
Source:	CVE-2012-0176
Protection Provided by:	Security Gateway R70 R71 R75
Who is Vulnerable?	Microsoft Silverlight 4 when installed on all supported releases of Microsoft Windows clients Microsoft Silverlight 4 when installed on all supported releases of Microsoft Windows servers
Vulnerability Description	A remote code execution vulnerability has been reported in Microsoft Silverlight.
Update/Patch Avaliable	Apply patches from here
Vulnerability Details	The vulnerability is due to an error in the way Microsoft Silverlight frees memory while rendering specially crafted XAML glyphs. A remote attacker can exploit this issue by enticing a target user to open a web-page that contains a specially crafted Silverlight application. Successful exploitation of this vulnerability could allow an attacker to take complete control of an affected system.

Protection Overview

This protection will detect and block attempts to transfer crafted XAML glyphs.

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, Protection tab and select the version of your choice.

Security Gateway R75 / R71 / R70

In the IPS tab, click Protections and find the Microsoft Silverlight Double-Free Remote Code Execution (MS12-034) protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:
Attack Name: Web Client Enforcement Violation
Attack Information: Microsoft Silverlight Double-Free Remote Code Execution (MS12-034)