Check Point Advisories

Microsoft .Net and Silverlight Framework Remote Code Execution (MS11-078; CVE-2011-1253)

Check Point Reference: CPAI-2011-467
Date Published: 11 Oct 2011
Severity: Critical
Last Updated: Tuesday 20 December, 2011
Source:
Industry Reference:CVE-2011-1253
Protection Provided by:

Security Gateway
R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description A remote code execution vulnerability has been reported in Microsoft .NET Framework and Silverlight framework. The vulnerability is due to the way that .NET Framework and Silverlight framework restrict inheritance within classes. A remote attacker may exploit this vulnerability by enticing unsuspecting users to open a specially crafted web-page containing a malicious Silverlight application. Successful exploitation may allow an attacker to take complete control of an affected system.

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 / R71 / R70

  1. In the IPS tab, click Protections and find the Microsoft .Net and Silverlight Framework Remote Code Execution (MS11-078) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Content Protection Violation.
Attack Information:  Microsoft .Net and Silverlight framework remote code execution (MS11-078)

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