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Note

Known issues in this security update

View products that this article applies to.

Summary

This update resolves a vulnerability in the Microsoft .NET Framework that could allow remote code execution when the .NET Framework fails to properly validate input before loading libraries. An attacker who successfully exploits this vulnerability could take control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2017-0160. Important

  • All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Additional information about this security update

  • For any Windows Management Instrumentation (WMI) applications returning the following error message:

    Get-WmiObject: The method or operation is not implemented.

    To temporarily disable this update, customers can apply the following registry entry to their system.

    Warning Enabling this registry entry could allow security vulnerabilities including Remote Code Execution.

    Registry entry

    • For 32-bit process on 32-bit system and 64-bit process on 64-bit system:

      HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319@WMIDisableCOMSecurity=1

    • For 32-bit process on 64-bit system:

      HKEY_LOCAL_MACHINE \Software\Wow6432Node\Microsoft\.NETFramework\v4.0.30319@WMIDisableCOMSecurity=1

    Notes

    • This registry entry should be a DWORD entry.

    • This registry entry restores the previous unsecured state.

  • For more information about this security update as it relates to Windows 8.1 and Windows Server 2012 R2, see the following article in the Microsoft Knowledge Base:

    4014987 Security update for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, and 4.6.2 updates for Windows 8.1 and Windows Server 2012 R2: April 11, 2017

How to obtain and install the update

Method 1: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog.

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Click Start, click Administrative Tools, and then click Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then click Action.

  3. Click Import Updates.

  4. WSUS will open a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.

  5. Once the control is installed, you will see the Microsoft Update Catalog screen. Enter 4014987 in the Search box, and then click Search.

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Click Add to add them to your basket.

  7. When you have selected all the packages you need, click View Basket.

  8. Click Import to import the packages to your WSUS server.

  9. Click Close once the packages have been imported to return to WSUS.

The updates are now available for installation through WSUS.

Update deployment information

For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:

Security update deployment information: April 11, 2017

Update removal information

Note We do not recommend that you remove any security update. To remove this update, use the Programs and Features item in Control Panel.

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update does not replace any previously released update.

File information

Package Name

Package Hash SHA 1

Package Hash SHA 2

Windows8.1-KB4014550-arm.msu

F40A6317EF501A3F39228B9AB94814A3091165D6

05BD6D3F79304053B2FDAD7DBB172288DFB91133239E71BCE878C0D485D247EC

Windows8.1-KB4014550-x64.msu

C26837009B04F56491F8C45FDC548F69520105BA

269C98332771435D12494AF26E33165C0CE71B221597DFE2901FB6C30AD4D0B4

Windows8.1-KB4014550-x86.msu

2480E905B55843645A64C98B4AA9637F4C1882A7

0B9EDA2EC5FAC0B268D9447CF81602E7C1FC159113F031D46E6CD7FDC33DFBF3

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported ARM-based versions

File name

File version

File size

Date

Time

Platform

Msvcp120_clr0400.dll

12.0.52242.36242

602,080

20-Mar-2017

05:16

Not applicable

Msvcr120_clr0400.dll

12.0.52242.36242

634,336

20-Mar-2017

05:16

Not applicable

Wminet_utils.dll

4.6.1646.0

110,592

20-Mar-2017

08:00

Not applicable

System.management.dll

4.6.1646.0

415,424

20-Mar-2017

08:06

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Msvcp120_clr0400.dll

12.0.52512.0

690,016

20-Mar-2017

05:16

x64

Msvcr120_clr0400.dll

12.0.52512.0

993,632

20-Mar-2017

05:16

x64

System.management.dll

4.6.1646.0

415,424

20-Mar-2017

08:06

x86

Wminet_utils.dll

4.6.1646.0

188,080

20-Mar-2017

08:01

x64

System.management.dll

4.6.1646.0

415,424

20-Mar-2017

08:06

x86

Msvcp120_clr0400.dll

12.0.52512.0

484,552

20-Mar-2017

05:16

x86

Msvcr120_clr0400.dll

12.0.52512.0

987,848

20-Mar-2017

05:16

x86

Wminet_utils.dll

4.6.1646.0

136,368

20-Mar-2017

08:06

x86

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

System.management.dll

4.6.1646.0

415,424

20-Mar-2017

08:06

x86

Msvcp120_clr0400.dll

12.0.52512.0

484,552

20-Mar-2017

05:16

x86

Msvcr120_clr0400.dll

12.0.52512.0

987,848

20-Mar-2017

05:16

x86

Wminet_utils.dll

4.6.1646.0

136,368

20-Mar-2017

08:06

x86

How to obtain help and support for this security update

Applies to

This article applies to the following:

  • Microsoft .NET Framework 4.6.2 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

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