Microsoft Security Bulletin MS14-026 - Important

  • Article
  • 37 minutes to read

Vulnerability in .NET Framework Could Allow Elevation of Privilege (2958732)

Published: May 13, 2014

Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft .NET Framework. The vulnerability could allow elevation of privilege if an authenticated attacker sends specially crafted data to an affected workstation or server that uses .NET Remoting. .NET Remoting is not widely used by applications; only custom applications that have been specifically designed to use .NET Remoting would expose a system to the vulnerability.

This security update is rated Important for Microsoft .NET Framework 1.1 Service Pack 1, Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4, Microsoft .NET Framework 4.5, and Microsoft .NET Framework 4.5.1 on affected releases of Microsoft Windows.

The security update addresses the vulnerability by helping to ensure that .NET Framework properly enforces security controls for application memory. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability later in this bulletin.

Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update immediately using update management software, or by checking for updates using the Microsoft Update service.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Knowledge Base Article

  • Knowledge Base Article: 2958732
  • File Information: Yes
  • SHA1/SHA2 hashes: Yes
  • Known issues: None

Affected and Non-Affected Software

The following software has been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.

Affected Software

**Operating System** **Component** **Maximum Security Impact** **Aggregate Severity Rating** **Updates Replaced**
**Windows Server 2003**
Windows Server 2003 Service Pack 2 [Microsoft .NET Framework 1.1 Service Pack 1](https://www.microsoft.com/download/details.aspx?familyid=ca773e4c-8380-4335-95ec-e2578cf2161b) (2931352) Elevation of Privilege Important 2898860 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2003 Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=05dff6b6-8d0e-4925-aac7-c61db8c7faf6) (2932079) Elevation of Privilege Important None
Windows Server 2003 Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Server 2003 x64 Edition Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=05dff6b6-8d0e-4925-aac7-c61db8c7faf6) (2932079) Elevation of Privilege Important None
Windows Server 2003 x64 Edition Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Server 2003 with SP2 for Itanium-based Systems [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=05dff6b6-8d0e-4925-aac7-c61db8c7faf6) (2932079) Elevation of Privilege Important None
Windows Server 2003 with SP2 for Itanium-based Systems [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
**Windows Vista**
Windows Vista Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=502eeb3a-3d4c-4df0-9640-3fd85bfbeeb6) (2931354) Elevation of Privilege Important 2901113 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Vista Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Vista Service Pack 2 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Vista Service Pack 2 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Vista x64 Edition Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=502eeb3a-3d4c-4df0-9640-3fd85bfbeeb6) (2931354) Elevation of Privilege Important 2901113 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Vista x64 Edition Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Vista x64 Edition Service Pack 2 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Vista x64 Edition Service Pack 2 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
**Windows Server 2008**
Windows Server 2008 for 32-bit Systems Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=502eeb3a-3d4c-4df0-9640-3fd85bfbeeb6) (2931354) Elevation of Privilege Important 2901113 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2008 for 32-bit Systems Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Server 2008 for 32-bit Systems Service Pack 2 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 for 32-bit Systems Service Pack 2 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 for x64-based Systems Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=502eeb3a-3d4c-4df0-9640-3fd85bfbeeb6) (2931354) Elevation of Privilege Important 2901113 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2008 for x64-based Systems Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Server 2008 for x64-based Systems Service Pack 2 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 for x64-based Systems Service Pack 2 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 for Itanium-based Systems Service Pack 2 [Microsoft .NET Framework 2.0 Service Pack 2](https://www.microsoft.com/download/details.aspx?familyid=502eeb3a-3d4c-4df0-9640-3fd85bfbeeb6) (2931354) Elevation of Privilege Important 2901113 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2008 for Itanium-based Systems Service Pack 2 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
**Windows 7**
Windows 7 for 32-bit Systems Service Pack 1 [Microsoft .NET Framework 3.5.1](https://www.microsoft.com/download/details.aspx?familyid=04b48334-68aa-4c97-9b64-25ce64b76394) (2931356) Elevation of Privilege Important 2901112 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows 7 for 32-bit Systems Service Pack 1 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows 7 for 32-bit Systems Service Pack 1 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows 7 for 32-bit Systems Service Pack 1 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows 7 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 3.5.1](https://www.microsoft.com/download/details.aspx?familyid=04b48334-68aa-4c97-9b64-25ce64b76394) (2931356) Elevation of Privilege Important 2901112 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows 7 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows 7 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows 7 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
**Windows Server 2008 R2**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 3.5.1](https://www.microsoft.com/download/details.aspx?familyid=04b48334-68aa-4c97-9b64-25ce64b76394) (2931356) Elevation of Privilege Important 2901112 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Server 2008 R2 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 R2 for x64-based Systems Service Pack 1 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 [Microsoft .NET Framework 3.5.1](https://www.microsoft.com/download/details.aspx?familyid=04b48334-68aa-4c97-9b64-25ce64b76394) (2931356) Elevation of Privilege Important 2901112 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
**Windows 8 and Windows 8.1**
Windows 8 for 32-bit Systems [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=28f243a4-9432-4afa-8488-28d36900cf2b) (2931357) Elevation of Privilege Important None
Windows 8 for 32-bit Systems [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows 8 for 32-bit Systems [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows 8 for x64-based Systems [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=28f243a4-9432-4afa-8488-28d36900cf2b) (2931357) Elevation of Privilege Important None
Windows 8 for x64-based Systems [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows 8 for x64-based Systems [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows 8.1 for 32-bit Systems [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=09237d7d-c15f-4945-b464-60cb6f8d771a) (2931358) Elevation of Privilege Important None
Windows 8.1 for 32-bit Systems [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=c26acfbc-ce2f-475e-affe-f15052a774d1) (2931366) Elevation of Privilege Important None
Windows 8.1 for x64-based Systems [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=09237d7d-c15f-4945-b464-60cb6f8d771a) (2931358) Elevation of Privilege Important None
Windows 8.1 for x64-based Systems [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=c26acfbc-ce2f-475e-affe-f15052a774d1) (2931366) Elevation of Privilege Important None
**Windows Server 2012 and Windows Server 2012 R2**
Windows Server 2012 [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=28f243a4-9432-4afa-8488-28d36900cf2b) (2931357) Elevation of Privilege Important None
Windows Server 2012 [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows Server 2012 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows Server 2012 R2 [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=09237d7d-c15f-4945-b464-60cb6f8d771a) (2931358) Elevation of Privilege Important None
Windows Server 2012 R2 [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=c26acfbc-ce2f-475e-affe-f15052a774d1) (2931366) Elevation of Privilege Important None
**Windows RT and Windows RT 8.1**
Windows RT Microsoft .NET Framework 4.5[2] (2931367) Elevation of Privilege Important None
Windows RT Microsoft .NET Framework 4.5.1[2] (2931367) Elevation of Privilege Important None
Windows RT 8.1 Microsoft .NET Framework 4.5.1[2] (2931366) Elevation of Privilege Important None
**Server Core installation option**
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) [Microsoft .NET Framework 3.5.1](https://www.microsoft.com/download/details.aspx?familyid=04b48334-68aa-4c97-9b64-25ce64b76394) (2931356) Elevation of Privilege Important 2901112 in [MS14-009](http://go.microsoft.com/fwlink/?linkid=386454)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) [Microsoft .NET Framework 4](https://www.microsoft.com/download/details.aspx?familyid=b8fb92cb-aa1a-45b2-a319-6bd57819ee45)[1] (2931365) Elevation of Privilege Important None
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=db705cbb-3d8b-4511-ac08-9656a0c4dc61) (2931368) Elevation of Privilege Important None
Windows Server 2012 (Server Core installation) [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=28f243a4-9432-4afa-8488-28d36900cf2b) (2931357) Elevation of Privilege Important None
Windows Server 2012 (Server Core installation) [Microsoft .NET Framework 4.5](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows Server 2012 (Server Core installation) [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=bf28e89d-2f46-42b9-ba4e-919a69ab7bb2) (2931367) Elevation of Privilege Important None
Windows Server 2012 R2 (Server Core installation) [Microsoft .NET Framework 3.5](https://www.microsoft.com/download/details.aspx?familyid=09237d7d-c15f-4945-b464-60cb6f8d771a) (2931358) Elevation of Privilege Important None
Windows Server 2012 R2 (Server Core installation) [Microsoft .NET Framework 4.5.1](https://www.microsoft.com/download/details.aspx?familyid=c26acfbc-ce2f-475e-affe-f15052a774d1) (2931366) Elevation of Privilege Important None
[1]**.NET Framework 4 and .NET Framework 4 Client Profile affected.** The .NET Framework version 4 redistributable packages are available in two profiles: .NET Framework 4 and .NET Framework 4 Client Profile. .NET Framework 4 Client Profile is a subset of .NET Framework 4. The vulnerability addressed in this update affects both .NET Framework 4 and .NET Framework 4 Client Profile. For more information, see the MSDN article, [Installing the .NET Framework](http://msdn.microsoft.com/library/5a4x27ek).

[2]Windows RT and Windows RT 8.1 security updates are provided via Windows Update.

Non-Affected Software

Operating System
Microsoft .NET Framework 3.0 Service Pack 2
Microsoft .NET Framework 3.5 Service Pack 1
Microsoft .NET Framework 4.5.2
  **Non-Applicable Software**

Operating System
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Update FAQ ---------- **I am running Windows 8.1, Windows Server 2012 R2, or Windows RT 8.1. Is there a prerequisite for installing the updates for .NET Framework 3.5 or .NET Framework 4.5.1?**  The answer to this question depends on the distribution channel that customers use to obtain security updates. Customers who obtain security updates from Windows Update or the Microsoft Update Catalog must first install the 2919355 update, released in April, 2014, before installing the .NET Framework 3.5 update (2931358) or the .NET Framework 4.5.1 update (2931366) where applicable on Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1 systems. For more information about the prerequisite update, see [Microsoft Knowledge Base Article 2919355](http://support.microsoft.com/kb/2919355). However, customers who obtain security updates through other channels, such as the Microsoft Download Center or Windows Server Update Services (WSUS), there is no such prerequisite; the 2931358 and 2931366 updates may be installed regardless of whether or not the 2919355 update has been installed. **How do I determine which version of the Microsoft .NET Framework is installed?** You can install and run multiple versions of the .NET Framework on a system, and you can install the versions in any order. There are several ways to determine which versions of the .NET Framework are currently installed. For more information, see [Microsoft Knowledge Base Article 318785](https://support.microsoft.com/kb/318785). **What is the difference between .NET Framework 4 and .NET Framework 4 Client Profile?** The .NET Framework version 4 redistributable packages are available in two profiles: .NET Framework 4 and .NET Framework 4 Client Profile. The .NET Framework 4 Client Profile is a subset of the .NET Framework 4 profile that is optimized for client applications. It provides functionality for most client applications, including Windows Presentation Foundation (WPF), Windows Forms, Windows Communication Foundation (WCF), and ClickOnce features. This enables faster deployment and a smaller install package for applications that target the .NET Framework 4 Client Profile. For more information, see the MSDN article, [.NET Framework Client Profile](http://msdn.microsoft.com/library/cc656912). **There are multiple update packages available for some of the affected software. Do I need to install all the updates listed in the Affected Software table for the software?** Yes. Customers should apply all updates offered for the software installed on their systems. **Do I need to install these security updates in a particular sequence?** No. Multiple updates for a given system can be applied in any sequence. **Does this update contain any security-related changes to functionality?**  Yes. In addition to the changes that are listed in the Vulnerability Information section of this bulletin, this update includes changes to add newer security features to older versions of the .NET Framework. **I am using an older release of the software discussed in this security bulletin. What should I do?** The affected software listed in this bulletin has been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, see the [Microsoft Support Lifecycle](http://go.microsoft.com/fwlink/?linkid=21742) website. It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see [Select a Product for Lifecycle Information](http://go.microsoft.com/fwlink/?linkid=169555). For more information about service packs for these software releases, see [Service Pack Lifecycle Support Policy](http://go.microsoft.com/fwlink/?linkid=89213). Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an , Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, see the [Microsoft Worldwide Information](http://go.microsoft.com/fwlink/?linkid=33329) website, select the country in the Contact Information list, and then click **Go** to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the [Microsoft Support Lifecycle Policy FAQ](http://go.microsoft.com/fwlink/?linkid=169557). Severity Ratings and Vulnerability Identifiers ---------------------------------------------- The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the [May bulletin summary](https://technet.microsoft.com/library/security/ms14-may). For more information, see [Microsoft Exploitability Index](http://technet.microsoft.com/security/cc998259).

**Vulnerability Severity Rating and Maximum Security Impact by Affected Software**
**Affected Software** **TypeFilterLevel Vulnerability – CVE-2014-1806** **Aggregate Severity Rating**
**Microsoft .NET Framework 1.1 Service Pack 1**
Microsoft .NET Framework 1.1 Service Pack 1 on Microsoft Windows Server 2003 Service Pack 2 (2931352) **Important** Elevation of Privilege **Important**
**Microsoft .NET Framework 2.0 Service Pack 2**
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 Service Pack 2 (2932079) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 x64 Edition Service Pack 2 (2932079) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 when installed on Microsoft Windows Server 2003 for Itanium-based Systems Service Pack 2 (2932079) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista Service Pack 2 (2931354) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Vista x64 Edition Service Pack 2 (2931354) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 (2931354) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 (2931354) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 (2931354) **Important** Elevation of Privilege **Important**
**Microsoft .NET Framework 3.5**
Microsoft .NET Framework 3.5 on Windows 8 for 32-bit Systems (2931357) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows 8 for x64-based Systems (2931357) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 (2931357) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) (2931357) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit Systems (2931358) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based Systems (2931358) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (2931358) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) (2931358) **Important** Elevation of Privilege **Important**
**Microsoft .NET Framework 3.5.1**
Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 (2931356) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 (2931356) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2931356) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2931356) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (2931356) **Important** Elevation of Privilege **Important**
**Microsoft .NET Framework 4**
Microsoft .NET Framework 4 when installed on Microsoft Windows Server 2003 Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Microsoft Windows Server 2003 x64 Edition Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Microsoft Windows Server 2003 for Itanium-based Systems Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Vista Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Vista x64 Edition Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 for x64-based Systems Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 for Itanium-Based Systems Service Pack 2 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows 7 for 32-bit Systems Service Pack 1 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows 7 for x64-based Systems Service Pack 1 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2931365)[1] **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 (2931365)[1] **Important** Elevation of Privilege **Important**
**Microsoft .NET Framework 4.5**
Microsoft .NET Framework 4.5 when installed on Windows Vista Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows Vista x64 Edition Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 for x64-based Systems Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows 7 for 32-bit Systems Service Pack 1 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows 7 for x64-based Systems Service Pack 1 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 on Windows 8 for 32-bit Systems (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 on Windows 8 for x64-based Systems (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 on Windows Server 2012 (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 on Windows Server 2012 (Server Core installation) (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5 on Windows RT (2931367) **Important** Elevation of Privilege **Important**
**Microsoft .NET Framework 4.5.1**
Microsoft .NET Framework 4.5.1 when installed on Windows Vista Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Vista x64 Edition Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 for x64-based Systems Service Pack 2 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows 7 for 32-bit Systems Service Pack 1 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows 7 for x64-based Systems Service Pack 1 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) (2931368) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows 8 for 32-bit Systems (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows 8 for x64-based Systems (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Server 2012 (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows Server 2012 (Server Core installation) (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 when installed on Windows RT (2931367) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 on Windows 8.1 for 32-bit Systems (2931366) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 on Windows 8.1 for x64-based Systems (2931366) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 on Windows 2012 R2 (2931366) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 on Windows 2012 R2 (Server Core installation) (2931366) **Important** Elevation of Privilege **Important**
Microsoft .NET Framework 4.5.1 on Windows RT 8.1 (2931366) **Important** Elevation of Privilege **Important**

TypeFilterLevel Vulnerability – CVE-2014-1806

An elevation of privilege vulnerability exists in the way that .NET Framework handles TypeFilterLevel checks for some malformed objects.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2014-1806.

Mitigating Factors

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:

  • .NET Remoting is not widely used by applications; only custom applications that have been specifically designed to use .NET Remoting would expose a system to the vulnerability.
  • .NET Remoting endpoints are not accessible to anonymous clients by default.

Workarounds

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:

  • Enable security when registering a channel

    Enabling security when registering a channel will allow only authenticated clients to interact with the vulnerable server. For more information see Authentication with the TCP Channel.

FAQ

What is the scope of the vulnerability?
This is an elevation of privilege vulnerability.

What causes the vulnerability?
The vulnerability is caused when the .NET Framework improperly enforces types of access controls on objects in memory.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could take complete control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

How could an attacker exploit the vulnerability?
An authenticated attacker could send specially crafted data to an affected workstation or server that uses .NET Remoting, allowing the attacker to execute arbitrary code on the targeted system.

What systems are primarily at risk from the vulnerability?
Systems running affected versions of .NET Framework that use .NET Remoting are primarily at risk from this vulnerability.

What is Microsoft .NET Remoting?
Microsoft .NET Remoting is a technology that simplifies how applications communicate and share objects with other applications.

What does the update do?
The update addresses the vulnerability by ensuring that .NET Framework properly enforces security controls for application memory.

When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft received information about this vulnerability through coordinated vulnerability disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.

Detection and Deployment Tools and Guidance

Several resources are available to help administrators deploy security updates. 

  • Microsoft Baseline Security Analyzer (MBSA) lets administrators scan local and remote systems for missing security updates and common security misconfigurations. 
  • Windows Server Update Services (WSUS), Systems Management Server (SMS), and System Center Configuration Manager help administrators distribute security updates. 
  • The Update Compatibility Evaluator components included with Application Compatibility Toolkit aid in streamlining the testing and validation of Windows updates against installed applications. 

For information about these and other tools that are available, see Security Tools for IT Pros. 

Security Update Deployment

Windows Server 2003 (all editions)

Reference Table

The following table contains the security update information for this software.

Security update file names For Microsoft .NET Framework 1.1 Service Pack 1 on all supported 32-bit editions of Windows Server 2003:
WindowsServer2003-KB2931352-x86-ENU.exe

For Microsoft .NET Framework 2.0 Service Pack 2 when installed on all supported 32-bit editions of Windows Server 2003:
NDP20SP2-KB2932079-x86.exe

For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2003:
NDP40-KB2931365-x86.exe

For Microsoft .NET Framework 2.0 Service Pack 2 when installed on all supported x64-based editions of Windows Server 2003:
NDP20SP2-KB2932079-x64.exe

For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2003:
NDP40-KB2931365-x64.exe

For Microsoft .NET Framework 2.0 Service Pack 2 when installed on all supported Itanium-based editions of Windows Server 2003:
NDP20SP2-KB2932079-IA64.exe

For Microsoft .NET Framework 4 when installed on all supported Itanium-based editions of Windows Server 2003:
NDP40-KB2931365-IA64.exe
Installation switches See Microsoft Knowledge Base Article 2844699
Update log file For Microsoft .NET Framework 1.1 Service Pack 1 on Windows Server 2003 Service Pack 2:
KB2931352.log

For Microsoft .NET Framework 2.0 Service Pack 2:
Microsoft .NET Framework 2.0-KB2932079_\*-msi0.txt
Microsoft .NET Framework 2.0-KB2932079_\*.html

For Microsoft .NET Framework 4:
KB2931365\_\*\_\*-Microsoft .NET Framework 4 Client Profile-MSP0.txt
KB2931365\_\*\_\*.html
Restart requirement In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.

To help reduce the chance that a restart will be required, stop all affected services and close all applications that may use the affected files prior to installing the security update. For more information about the reasons why you may be prompted to restart, see Microsoft Knowledge Base Article 887012.
Removal information Use the Add or Remove Programs item in Control Panel.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification For Microsoft .NET Framework 1.1 Service Pack 1 on all supported 32-bit editions of Windows Server 2003:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows Server 2003\SP3\KB2931352\

For Microsoft .NET Framework 2.0 Service Pack 2:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 2.0 Service Pack 2\SP2\KB2932079
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2003:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2003:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported Itanium-based editions of Windows Server 2003:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

Windows Vista (all editions)

Reference Table

The following table contains the security update information for this software.

Security update file names For Microsoft .NET Framework 2.0 Service Pack 2 on all supported 32-bit editions of Windows Vista:
Windows6.0-KB2931354-x86.msu

For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Vista:
NDP40-KB2931365-x86.exe

For Microsoft .NET Framework 4.5 when installed on all supported 32-bit editions of Windows Vista:
NDP45-KB2931368-x86.exe

For Microsoft .NET Framework 4.5.1 when installed on all supported 32-bit editions of Windows Vista:
NDP45-KB2931368-x86.exe

For Microsoft .NET Framework 2.0 Service Pack 2 on all supported x64-based editions of Windows Vista:
Windows6.0-KB2931354-x64.msu

For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Vista:
NDP40-KB2931365-x64.exe

For Microsoft .NET Framework 4.5 when installed on all supported x64-based editions of Windows Vista:
NDP45-KB2931368-x64.exe

For Microsoft .NET Framework 4.5.1 when installed on all supported x64-based editions of Windows Vista:
NDP45-KB2931368-x64.exe
Installation switches See Microsoft Knowledge Base Article 2844699
Update log file For Microsoft .NET Framework 2.0 Service Pack 2:
Not applicable

For Microsoft .NET Framework 4:
KB2931365\_\*\_\*-Microsoft .NET Framework 4 Client Profile-MSP0.txt
KB2931365\_\*\_\*.html

For Microsoft .NET Framework 4.5:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5-MSP0.txt
KB2931368\_\*\_\*.html

For Microsoft .NET Framework 4.5.1:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5.1-MSP0.txt
KB2931368\_\*\_\*.html
Restart requirement This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information Click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification For Microsoft .NET Framework 2.0 Service Pack 2:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Vista:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Vista:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5\KB2931368
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5.1:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5.1\KB2931368
"ThisVersionInstalled" = "Y"

Windows Server 2008 (all editions)

Reference Table

The following table contains the security update information for this software.

Security update file names For Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2:
Windows6.0-KB2931354-x86.msu

For Microsoft .NET Framework 4 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2:
NDP40-KB2931365-x86.exe

For Microsoft .NET Framework 4.5 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2:
NDP45-KB2931368-x86.exe

For Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 for 32-bit Systems Service Pack 2:
NDP45-KB2931368-x86.exe

For Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2:
Windows6.0-KB2931354-x64.msu

For Microsoft .NET Framework 4 when installed on Windows Server 2008 for x64-based Systems Service Pack 2:
NDP40-KB2931365-x64.exe

For Microsoft .NET Framework 4.5 when installed on Windows Server 2008 for x64-based Systems Service Pack 2:
NDP45-KB2931368-x64.exe

For Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 for x64-based Systems Service Pack 2:
NDP45-KB2931368-x64.exe

For Microsoft .NET Framework 2.0 Service Pack 2 on all supported Itanium-based editions of Windows Server 2008:
Windows6.0-KB2931354-ia64.msu

For Microsoft .NET Framework 4 when installed on Windows Server 2008 for Itanium-based Systems Service Pack 2:
NDP40-KB2931365-IA64.exe
Installation switches See Microsoft Knowledge Base Article 2844699
Update log file For Microsoft .NET Framework 2.0 Service Pack 2:
Not applicable

For Microsoft .NET Framework 4:
KB2931365\_\*\_\*-Microsoft .NET Framework 4 Client Profile-MSP0.txt
KB2931365\_\*\_\*.html

For Microsoft .NET Framework 4.5:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5-MSP0.txt
KB2931368\_\*\_\*.html

For Microsoft .NET Framework 4.5.1:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5.1-MSP0.txt
KB2931368\_\*\_\*.html
Restart requirement This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information Click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification For Microsoft .NET Framework 2.0 Service Pack 2:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows Server 2008:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows Server 2008:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported Itanium-based editions of Windows Server 2008:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5\KB2931368
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5.1:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5.1\KB2931368
"ThisVersionInstalled" = "Y"

Windows 7 (all editions)

Reference Table

The following table contains the security update information for this software.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Security update file name For Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1:
Windows6.1-KB2931356-x86.msu

For Microsoft .NET Framework 4 when installed on Windows 7 for 32-bit Systems Service Pack 1:
NDP40-KB2931365-x86.exe

For Microsoft .NET Framework 4.5 when installed on Windows 7 for 32-bit Systems Service Pack 1:
NDP45-KB2931368-x86.exe

For Microsoft .NET Framework 4.5.1 when installed on Windows 7 for 32-bit Systems Service Pack 1:
NDP45-KB2931368-x86.exe

For Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1:
Windows6.1-KB2931356-x64.msu

For Microsoft .NET Framework 4 when installed on Windows 7 for x64-based Systems Service Pack 1:
NDP40-KB2931365-x64.exe

For Microsoft .NET Framework 4.5 when installed on Windows 7 for x64-based Systems Service Pack 1:
NDP45-KB2931368-x64.exe

For Microsoft .NET Framework 4.5.1 when installed on Windows 7 for x64-based Systems Service Pack 1:
NDP45-KB2931368-x64.exe
Installation switches See Microsoft Knowledge Base Article 2844699
Update log file For Microsoft .NET Framework 3.5.1:
Not applicable.

For Microsoft .NET Framework 4:
KB2931365 \_\*\_\*-Microsoft .NET Framework 4 Client Profile-MSP0.txt
KB2931365\_\*\_\*.html

For Microsoft .NET Framework 4.5:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5-MSP0.txt
KB2931368\_\*\_\*.html

For Microsoft .NET Framework 4.5.1:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5.1-MSP0.txt
KB2931368\_\*\_\*.html
Restart requirement This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information Click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification For Microsoft .NET Framework 3.5.1:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4 when installed on all supported 32-bit editions of Windows 7:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4 when installed on all supported x64-based editions of Windows 7:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5\KB2931368
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5.1:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5.1\KB2931368
"ThisVersionInstalled" = "Y"

Windows Server 2008 R2 (all editions)

Reference Table

The following table contains the security update information for this software.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Security update file name For Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1:
Windows6.1-KB2931356-x64.msu

For Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1:
NDP40-KB2931365-x64.exe

For Microsoft .NET Framework 4.5 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1:
NDP45-KB2931368-x64.exe

For Microsoft .NET Framework 4.5.1 when installed on Windows Server 2008 R2 for x64-based Systems Service Pack 1:
NDP45-KB2931368-x64.exe

For Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:
Windows6.1-KB2931356-ia64.msu

For Microsoft .NET Framework 4 when installed on Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:
NDP40-KB2931365-ia64.exe
Installation switches See Microsoft Knowledge Base Article 2844699
Update log file For Microsoft .NET Framework 3.5.1:
Not applicable

For Microsoft .NET Framework 4:
KB2931365\_\*\_\*-Microsoft .NET Framework 4 Client Profile-MSP0.txt
KB2931365\_\*\_\*.html

For Microsoft .NET Framework 4.5:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5-MSP0.txt
KB2931368\_\*\_\*.html

For Microsoft .NET Framework 4.5.1:
KB2931368\_\*\_\*-Microsoft .NET Framework 4.5.1-MSP0.txt
KB2931368\_\*\_\*.html
Restart requirement This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information Click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification For Microsoft .NET Framework 3.5.1:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Updates\Microsoft .NET Framework 4 Client Profile\KB2931365
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5\KB2931368
"ThisVersionInstalled" = "Y"

For Microsoft .NET Framework 4.5.1:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Microsoft .NET Framework 4.5.1\KB2931368
"ThisVersionInstalled" = "Y"

Windows 8 and Windows 8.1 (all editions)

Reference Table

The following table contains the security update information for this software.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Security update file name For Microsoft .NET Framework 3.5 on Windows 8 for 32-bit Systems:
Windows8-RT-KB2931357-x86.msu

For Microsoft .NET Framework 4.5 on Windows 8 for 32-bit Systems:
Windows8-RT-KB2931367-x86.msu

For Microsoft .NET Framework 4.5.1 on Windows 8 for 32-bit Systems:
Windows8-RT-KB2931367-x86.msu

For Microsoft .NET Framework 3.5 on Windows 8 for x64-based Systems:
Windows8-RT-KB2931357-x64.msu

For Microsoft .NET Framework 4.5 Windows 8 for x64-based Systems:
Windows8-RT-KB2931367-x64.msu

For Microsoft .NET Framework 4.5.1 on Windows 8 for x64-based Systems:
Windows8-RT-KB2931367-x64.msu

For Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit Systems:
Windows8.1-KB2931358-x86.msu

For Microsoft .NET Framework 4.5.1 on Windows 8.1 for 32-bit Systems:
Windows8.1-KB2931366-x86.msu

For Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based Systems:
Windows8.1-KB2931358-x64.msu

For Microsoft .NET Framework 4.5.1 on Windows 8.1 for x64-based Systems:
Windows8.1-KB2931366-x64.msu
Installation switches See Microsoft Knowledge Base Article 2844699
Restart requirement This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification For Microsoft .NET Framework 3.5:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4.5:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

For Microsoft .NET Framework 4.5.1:
Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.

Windows Server 2012 and Windows Server 2012 R2 (all editions)

Reference Table

The following table contains the security update information for this software.

Inclusion in Future Service Packs The update for this issue will be included in a future service pack or update rollup
Security update file name For Microsoft .NET Framework 3.5 on Windows Server 2012:
Windows8-RT-KB2931357-x64.msu

For Microsoft .NET Framework 4.5 on Windows Server 2012:
Windows8-RT-KB2931367-x64.msu

For Microsoft .NET Framework 4.5.1 on Windows Server 2012:
Windows8-RT-KB2931367-x64.msu

For Microsoft .NET Framework 3.5 on Windows Server 2012 R2:
Windows8.1-KB2931358-x64.msu

For Microsoft .NET Framework 4.5.1 on Windows Server 2012 R2:
Windows8.1-KB2931366-x64.msu
Installation switches See Microsoft Knowledge Base Article 2844699
Restart requirement This update does not require a restart. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart.
Removal information Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.
File information See Microsoft Knowledge Base Article 2958732
Registry key verification Note A registry key does not exist to validate the presence of this update. Use WMI to detect for the presence of this update.
### Windows RT and Windows RT 8.1 (all editions) The following table contains the security update information for this software.

Deployment For Microsoft .NET Framework 4.5 on Windows RT:
The 2931367 update is available via Windows Update.

For Microsoft .NET Framework 4.5.1 on Windows RT:
The 2931367 update is available via Windows Update.

For Microsoft .NET Framework 4.5.1 on Windows RT 8.1:
The 2931366 update is available via Windows Update.
Restart Requirement Yes, you must restart your system after you apply this security update.
Removal Information Click Control Panel, click System and Security, and then under Windows Update, click View update history and select from the list of updates.
File Information See Microsoft Knowledge Base Article 2958732
Acknowledgments --------------- Microsoft [thanks](http://go.microsoft.com/fwlink/?linkid=21127) the following for working with us to help protect customers: - James Forshaw of [Context Information Security](http://www.contextis.com/) for the reporting the TypeFilterLevel Vulnerability - CVE-2014-1806 Other Information ----------------- ### Microsoft Active Protections Program (MAPP) To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please go to the active protections websites provided by program partners, listed in [Microsoft Active Protections Program (MAPP) Partners](http://go.microsoft.com/fwlink/?linkid=215201). ### Support **How to obtain help and support for this security update** - Help installing updates: [Support for Microsoft Update](http://support.microsoft.com/ph/6527) - Security solutions for IT professionals: [TechNet Security Troubleshooting and Support](http://technet.microsoft.com/security/bb980617.aspx) - Help protect your computer that is running Windows from viruses and malware: [Virus Solution and Security Center](http://support.microsoft.com/contactus/cu_sc_virsec_master) - Local support according to your country: [International Support](http://support.microsoft.com/common/international.aspx) ### Disclaimer The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. ### Revisions - V1.0 (May 13, 2014): Bulletin published. *Page generated 2014-06-25 8:52Z-07:00.*