Check Point Advisories

Microsoft .NET Silverlight Manifest Resource File Information Disclosure (CVE-2015-6114)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0019
Date Published:	12 Jan 2016
Severity:	High
Last Updated:	Tuesday 12 January, 2016
Source:	Microsoft MS15-129
Industry Reference:	CVE-2015-6114
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Microsoft Silverlight 5
Vulnerability Description	An information disclosure vulnerability exists in Microsoft .NET Silverlight manifest resource parsing functionality. The vulnerability is due to an error while processing a corrupted manifest. An attacker can exploit this vulnerability by supplying a specially crafted resource through a .NET or Silverlight assembly.
Update/Patch Avaliable	Apply patches from: MS15-129

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 .NET Silverlight Manifest Resource File Information Disclosure 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 .NET Silverlight Manifest Resource File Information Disclosure