Applies to:

Microsoft .NET Framework 4.6 Microsoft .NET Framework 4.6.1 Microsoft .NET Framework 4.6.2 Microsoft .NET Framework 4.7 Microsoft .NET Framework 4.7.1 Microsoft .NET Framework 4.7.2

Summary

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly. An attacker who successfully exploited this vulnerability could take control of an affected system. An 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 the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).

Important

  • Starting in August, 2019, updates to .NET Framework 4.6 and above, for Windows Server 2008 SP2, Windows Server 2008 R2 SP1, and Windows 7SP1, require SHA-2 Code signing support. Please make sure that you have all the latest Windows Updates before applying this update to avoid installation issues. For more detailed information about SHA-2 code signing support updates, please see KB 4474419.

  • All updates for .NET Framework 4.7.2, 4.7.1, 4.7, 4.6.2, 4.6.1, and 4.6 require that the d3dcompiler_47.dll update is installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll, see KB 4019990.

  • 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 update

The following articles contain additional information about this update as it relates to individual product versions.

  • 4534979 Description of the Security Only Update for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 SP2 (KB4534979)

  • 4534976 Description of the Security Only Update for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 and Windows Server 2008 SP2 (KB4534976)

How to obtain and install the update

Method 1: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then select Action.

  3. Select Import Updates.

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

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4534976 for Windows 7 SP1 and Windows Server 2008 R2 SP1 or type 4534979 for Windows Server 2008 SP2 into the Search box, and then select Search.

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

  7. After you select all the packages that you require, select View Basket.

  8. To import the packages to your WSUS server, select Import.

  9. After the packages are imported, select Close 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:

20200114 Security update deployment information: January 14, 2020

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.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

x86

File name

File version

File size

Date

Time

GlobalUserInterface.CompositeFont

186,009

05-Dec-2019

23:06

msvcp120_clr0400.dll

12.0.52519.0

485,576

05-Dec-2019

23:06

msvcr120_clr0400.dll

12.0.52519.0

987,840

05-Dec-2019

23:06

VsVersion.dll

14.7.3570.0

19,736

05-Dec-2019

23:06

PresentationCore.dll

4.7.3570.0

3,637,016

05-Dec-2019

23:06

PresentationFramework.dll

4.7.3570.0

6,243,304

05-Dec-2019

23:06

PresentationFramework-SystemData.dll

4.7.3570.0

24,856

05-Dec-2019

23:06

PresentationHost_v0400.dll

4.7.3570.0

215,016

05-Dec-2019

23:06

PresentationHost_v0400.dll.mui

4.7.3570.0

85,480

05-Dec-2019

23:06

PresentationNative_v0400.dll

4.7.3570.0

827,880

05-Dec-2019

23:06

ReachFramework.dll

4.7.3570.0

677,656

05-Dec-2019

23:06

System.Core.dll

4.7.3570.0

1,552,960

05-Dec-2019

23:06

System.Printing.dll

4.7.3570.0

374,032

05-Dec-2019

23:06

System.Workflow.Activities.dll

4.7.3570.0

1,052,136

05-Dec-2019

23:06

System.Workflow.ComponentModel.dll

4.7.3570.0

1,553,896

05-Dec-2019

23:06

System.Workflow.Runtime.dll

4.7.3570.0

499,480

05-Dec-2019

23:06

System.Windows.Controls.Ribbon.dll

4.7.3570.0

743,400

05-Dec-2019

23:06

System.Xaml.dll

4.7.3570.0

642,696

05-Dec-2019

23:06

UIAutomationClient.dll

4.7.3570.0

178,664

05-Dec-2019

23:06

UIAutomationClientsideProviders.dll

4.7.3570.0

361,952

05-Dec-2019

23:06

UIAutomationProvider.dll

4.7.3570.0

49,432

05-Dec-2019

23:06

UIAutomationTypes.dll

4.7.3570.0

221,696

05-Dec-2019

23:06

WindowsBase.dll

4.7.3570.0

1,296,664

05-Dec-2019

23:06

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

89,880

05-Dec-2019

23:06

WPFFontCache_v0400.exe.mui

4.7.3570.0

19,944

05-Dec-2019

23:06

WPFFontCache_v0400.exe

4.7.3570.0

26,656

05-Dec-2019

23:06

wpfgfx_v0400.dll

4.7.3570.0

1,346,536

05-Dec-2019

23:06

Placeholder.dll

4.7.3570.0

25,576

05-Dec-2019

23:06

PenIMC2_v0400.dll

4.7.3570.0

87,016

05-Dec-2019

23:06

x64

File name

File version

File size

Date

Time

GlobalUserInterface.CompositeFont

186,009

05-Dec-2019

23:06

msvcp120_clr0400.dll

12.0.52519.0

690,008

05-Dec-2019

23:18

msvcp120_clr0400.dll

12.0.52519.0

485,576

05-Dec-2019

23:06

msvcr120_clr0400.dll

12.0.52519.0

993,632

05-Dec-2019

23:18

msvcr120_clr0400.dll

12.0.52519.0

987,840

05-Dec-2019

23:06

VsVersion.dll

14.7.3570.0

19,944

05-Dec-2019

23:17

VsVersion.dll

14.7.3570.0

19,736

05-Dec-2019

23:06

PresentationCore.dll

4.7.3570.0

3,614,704

05-Dec-2019

23:17

PresentationCore.dll

4.7.3570.0

3,637,016

05-Dec-2019

23:06

PresentationFramework.dll

4.7.3570.0

6,243,304

05-Dec-2019

23:06

PresentationFramework-SystemData.dll

4.7.3570.0

24,856

05-Dec-2019

23:06

PresentationHost_v0400.dll

4.7.3570.0

278,296

05-Dec-2019

23:17

PresentationHost_v0400.dll.mui

4.7.3570.0

85,480

05-Dec-2019

23:17

PresentationHost_v0400.dll

4.7.3570.0

215,016

05-Dec-2019

23:06

PresentationHost_v0400.dll.mui

4.7.3570.0

85,480

05-Dec-2019

23:06

PresentationNative_v0400.dll

4.7.3570.0

1,110,504

05-Dec-2019

23:17

PresentationNative_v0400.dll

4.7.3570.0

827,880

05-Dec-2019

23:06

ReachFramework.dll

4.7.3570.0

677,656

05-Dec-2019

23:06

System.Core.dll

4.7.3570.0

1,552,960

05-Dec-2019

23:06

System.Printing.dll

4.7.3570.0

374,552

05-Dec-2019

23:17

System.Printing.dll

4.7.3570.0

374,032

05-Dec-2019

23:06

System.Workflow.Activities.dll

4.7.3570.0

1,052,136

05-Dec-2019

23:06

System.Workflow.ComponentModel.dll

4.7.3570.0

1,553,896

05-Dec-2019

23:06

System.Workflow.Runtime.dll

4.7.3570.0

499,480

05-Dec-2019

23:06

System.Windows.Controls.Ribbon.dll

4.7.3570.0

743,400

05-Dec-2019

23:06

System.Xaml.dll

4.7.3570.0

642,696

05-Dec-2019

23:06

UIAutomationClient.dll

4.7.3570.0

178,664

05-Dec-2019

23:06

UIAutomationClientsideProviders.dll

4.7.3570.0

361,952

05-Dec-2019

23:06

UIAutomationProvider.dll

4.7.3570.0

49,432

05-Dec-2019

23:06

UIAutomationTypes.dll

4.7.3570.0

221,696

05-Dec-2019

23:06

WindowsBase.dll

4.7.3570.0

1,296,664

05-Dec-2019

23:06

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

101,656

05-Dec-2019

23:17

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

89,880

05-Dec-2019

23:06

WPFFontCache_v0400.exe.mui

4.7.3570.0

19,736

06-Dec-2019

00:59

WPFFontCache_v0400.exe.mui

4.7.3570.0

19,944

05-Dec-2019

23:06

WPFFontCache_v0400.exe

4.7.3570.0

27,464

06-Dec-2019

00:59

WPFFontCache_v0400.exe

4.7.3570.0

26,656

05-Dec-2019

23:06

wpfgfx_v0400.dll

4.7.3570.0

1,765,864

05-Dec-2019

23:17

wpfgfx_v0400.dll

4.7.3570.0

1,346,536

05-Dec-2019

23:06

Placeholder.dll

4.7.3570.0

26,592

05-Dec-2019

23:17

Placeholder.dll

4.7.3570.0

25,576

05-Dec-2019

23:06

PenIMC2_v0400.dll

4.7.3570.0

105,448

05-Dec-2019

23:17

PenIMC2_v0400.dll

4.7.3570.0

87,016

05-Dec-2019

23:06

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