Applies to:

Microsoft .NET Framework 2.0 Microsoft .NET Framework 3.0

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 4.6 for Windows Server 2008 Service Pack 2 (SP2) 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)

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 4534979 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.

Windows Vista and Windows Server 2008 file information

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

File information

File hash information

File name

SHA1 hash

SHA256 hash

Windows6.0-KB4532959-ia64.msu

8F95CDD6B3810E59EBAE13134B7F3CC2AA10EE45

CCCB6203633231CF48460A746D2072AC81EF296E39107F39F874A5F2A20107C8

Windows6.0-KB4532959-x64.msu

AEC58E7430030ADA86AE379B0AEAD18B2994E017

A4A7888439680284987BF4FED9A0ED18EB79FFA872839D6F941DABEF3F1583BB

Windows6.0-KB4532959-x86.msu

DDD93252E9E5C747E10420DF1B39C27E761A2072

0A2F2A4E902DCB4469F4CCA607C13264A4DA0DD1F17DC790339428172F39D345

For all supported ia64-based versions

File name

File version

File size

Date

Time

Platform

System.workflow.activities.dll

3.0.4203.8833

1,060,864

06-Dec-2019

14:07

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,531,904

06-Dec-2019

14:07

x86

System.workflow.runtime.dll

3.0.4203.8833

454,656

06-Dec-2019

14:07

x86

System.workflow.activities.dll

3.0.4203.8833

1,142,784

06-Dec-2019

14:06

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,638,400

06-Dec-2019

14:06

x86

System.workflow.runtime.dll

3.0.4203.8833

540,672

06-Dec-2019

14:06

x86

System.workflow.activities.dll

3.0.4203.8833

1,142,784

06-Dec-2019

14:06

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,638,400

06-Dec-2019

14:06

x86

System.workflow.runtime.dll

3.0.4203.8833

540,672

06-Dec-2019

14:06

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Presentationcore.dll

3.0.6920.8833

4,006,400

06-Dec-2019

14:07

x64

Presentationfontcache.exe.config

Not applicable

161

18-Oct-2018

23:19

Not applicable

Wpfgfx_v0300.dll

3.0.6920.8833

2,265,888

06-Dec-2019

14:07

x64

System.printing.dll

3.0.6920.8833

358,400

06-Dec-2019

14:07

x64

Penimc.dll

3.0.6920.8833

95,728

06-Dec-2019

14:07

x64

Presentationframework.dll

3.0.6920.8833

4,648,960

06-Dec-2019

14:07

x86

Presentationhostdll.dll

3.0.6920.8833

182,048

06-Dec-2019

14:07

x64

Reachframework.dll

3.0.6920.8833

536,576

06-Dec-2019

14:07

x86

Windowsbase.dll

3.0.6920.8833

1,118,208

06-Dec-2019

14:07

x86

System.workflow.activities.dll

3.0.4203.8833

1,060,864

06-Dec-2019

14:07

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,531,904

06-Dec-2019

14:07

x86

System.workflow.runtime.dll

3.0.4203.8833

454,656

06-Dec-2019

14:07

x86

Presentationframework.dll

3.0.6920.8833

5,292,032

06-Dec-2019

14:06

x86

Reachframework.dll

3.0.6920.8833

536,576

06-Dec-2019

14:06

x86

System.workflow.activities.dll

3.0.4203.8833

1,142,784

06-Dec-2019

14:06

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,638,400

06-Dec-2019

14:06

x86

System.workflow.runtime.dll

3.0.4203.8833

540,672

06-Dec-2019

14:06

x86

Windowsbase.dll

3.0.6920.8833

1,257,472

06-Dec-2019

14:06

x86

Presentationcore.dll

3.0.6920.8833

4,222,976

06-Dec-2019

14:06

x86

Presentationfontcache.exe.config

Not applicable

161

16-Nov-2017

03:47

Not applicable

Wpfgfx_v0300.dll

3.0.6920.8833

1,747,952

06-Dec-2019

14:06

x86

System.printing.dll

3.0.6920.8833

372,736

06-Dec-2019

14:06

x86

Penimc.dll

3.0.6920.8833

78,624

06-Dec-2019

14:06

x86

Presentationframework.dll

3.0.6920.8833

5,292,032

06-Dec-2019

14:06

x86

Presentationhostdll.dll

3.0.6920.8833

141,288

06-Dec-2019

14:06

x86

Reachframework.dll

3.0.6920.8833

536,576

06-Dec-2019

14:06

x86

Windowsbase.dll

3.0.6920.8833

1,257,472

06-Dec-2019

14:06

x86

Xpsviewer.exe

3.0.6920.8833

309,760

06-Dec-2019

14:06

x86

System.workflow.activities.dll

3.0.4203.8833

1,142,784

06-Dec-2019

14:06

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,638,400

06-Dec-2019

14:06

x86

System.workflow.runtime.dll

3.0.4203.8833

540,672

06-Dec-2019

14:06

x86

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Presentationframework.dll

3.0.6920.8833

5,292,032

06-Dec-2019

14:06

x86

Reachframework.dll

3.0.6920.8833

536,576

06-Dec-2019

14:06

x86

System.workflow.activities.dll

3.0.4203.8833

1,142,784

06-Dec-2019

14:06

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,638,400

06-Dec-2019

14:06

x86

System.workflow.runtime.dll

3.0.4203.8833

540,672

06-Dec-2019

14:06

x86

Windowsbase.dll

3.0.6920.8833

1,257,472

06-Dec-2019

14:06

x86

Presentationcore.dll

3.0.6920.8833

4,222,976

06-Dec-2019

14:06

x86

Presentationfontcache.exe.config

Not applicable

161

16-Nov-2017

03:47

Not applicable

Wpfgfx_v0300.dll

3.0.6920.8833

1,747,952

06-Dec-2019

14:06

x86

System.printing.dll

3.0.6920.8833

372,736

06-Dec-2019

14:06

x86

Penimc.dll

3.0.6920.8833

78,624

06-Dec-2019

14:06

x86

Presentationframework.dll

3.0.6920.8833

5,292,032

06-Dec-2019

14:06

x86

Presentationhostdll.dll

3.0.6920.8833

141,288

06-Dec-2019

14:06

x86

Reachframework.dll

3.0.6920.8833

536,576

06-Dec-2019

14:06

x86

Windowsbase.dll

3.0.6920.8833

1,257,472

06-Dec-2019

14:06

x86

Xpsviewer.exe

3.0.6920.8833

309,760

06-Dec-2019

14:06

x86

System.workflow.activities.dll

3.0.4203.8833

1,142,784

06-Dec-2019

14:06

x86

System.workflow.componentmodel.dll

3.0.4203.8833

1,638,400

06-Dec-2019

14:06

x86

System.workflow.runtime.dll

3.0.4203.8833

540,672

06-Dec-2019

14:06

x86

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