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

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Check Point Reference: CPAI-2012-199
Date Published:
Severity:
Source: Microsoft Security Bulletin MS12-034
Industry Reference(s): 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 Available
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.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  1. 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.
  2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: Web Client Enforcement Violation
Attack Information: Microsoft Silverlight Double-Free Remote Code Execution (MS12-034)