Applies to:

Microsoft .NET Framework 4.8

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.

Additional information about this update

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

  • 4535102 Description of the Security and Quality Rollup 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 (KB4535102)

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

Method 3: 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 4535102 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.

Update replacement information

This update replaces previously released updates .

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

Aspnet_perf.dll

4.8.4075.0

43,800

11-Dec-2019

07:15

aspnet_wp.exe

4.8.4075.0

47,608

11-Dec-2019

07:15

clr.dll

4.8.4069.0

8,044,520

11-Dec-2019

07:15

clrjit.dll

4.8.4069.0

561,640

11-Dec-2019

07:15

mscordacwks.dll

4.8.4069.0

1,315,304

11-Dec-2019

07:15

mscordbi.dll

4.8.4069.0

1,196,008

11-Dec-2019

07:15

mscoreei.dll

4.8.4018.0

581,400

11-Dec-2019

07:15

mscorlib.dll

4.8.4069.0

5,678,360

11-Dec-2019

07:15

Placeholder.dll

4.8.4110.0

25,880

11-Dec-2019

07:15

VsVersion.dll

14.8.4110.0

19,216

11-Dec-2019

07:15

PenIMC2_v0400.dll

4.8.4110.0

107,288

11-Dec-2019

07:15

peverify.dll

4.8.4069.0

190,440

11-Dec-2019

07:15

PresentationCore.dll

4.8.4110.0

3,676,952

11-Dec-2019

07:15

PresentationFramework.dll

4.8.4110.0

6,269,720

11-Dec-2019

07:15

PresentationFramework-SystemData.dll

4.8.4110.0

25,576

11-Dec-2019

07:15

PresentationHost_v0400.dll

4.8.4110.0

241,432

11-Dec-2019

07:15

PresentationHost_v0400.dll.mui

4.8.4110.0

85,264

11-Dec-2019

07:15

PresentationNative_v0400.dll

4.8.4110.0

930,584

11-Dec-2019

07:15

ReachFramework.dll

4.8.4110.0

677,656

11-Dec-2019

07:15

ServiceMonikerSupport.dll

4.8.3825.0

31,488

11-Dec-2019

07:15

SMDiagnostics.dll

4.8.3825.0

73,544

11-Dec-2019

07:15

SOS.dll

4.8.4069.0

774,936

11-Dec-2019

07:15

System.Activities.dll

4.8.3825.0

1,533,344

11-Dec-2019

07:15

System.Core.dll

4.8.4110.0

1,556,616

11-Dec-2019

07:15

System.IdentityModel.dll

4.8.3825.0

1,093,960

11-Dec-2019

07:15

System.IdentityModel.Services.dll

4.8.3825.0

198,400

11-Dec-2019

07:15

System.Printing.dll

4.8.4110.0

399,640

11-Dec-2019

07:15

System.Runtime.Serialization.dll

4.8.3825.0

1,054,112

11-Dec-2019

07:15

System.ServiceModel.Channels.dll

4.8.3825.0

157,744

11-Dec-2019

07:15

System.ServiceModel.Discovery.dll

4.8.3825.0

308,272

11-Dec-2019

07:15

System.ServiceModel.dll

4.8.3825.0

6,386,504

11-Dec-2019

07:15

System.ServiceModel.Internals.dll

4.8.3825.0

253,344

11-Dec-2019

07:15

System.ServiceModel.WasHosting.dll

4.8.3825.0

40,192

11-Dec-2019

07:15

System.Web.ApplicationServices.dll

4.8.4075.0

71,512

11-Dec-2019

07:15

System.Web.Extensions.dll

4.8.4075.0

1,849,992

11-Dec-2019

07:15

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

11-Dec-2019

07:15

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

11-Dec-2019

07:15

System.Workflow.Runtime.dll

4.8.4110.0

503,064

11-Dec-2019

07:15

System.dll

4.8.4001.0

3,560,496

11-Dec-2019

07:15

System.Web.dll

4.8.4075.0

5,416,728

11-Dec-2019

07:15

System.Windows.Controls.Ribbon.dll

4.8.4110.0

748,032

11-Dec-2019

07:15

System.Windows.Forms.dll

4.8.4042.0

5,920,392

11-Dec-2019

07:15

System.Xaml.dll

4.8.4110.0

640,048

11-Dec-2019

07:15

UIAutomationClient.dll

4.8.4110.0

178,456

11-Dec-2019

07:15

UIAutomationClientsideProviders.dll

4.8.4110.0

361,752

11-Dec-2019

07:15

UIAutomationProvider.dll

4.8.4110.0

49,432

11-Dec-2019

07:15

UIAutomationTypes.dll

4.8.4110.0

223,512

11-Dec-2019

07:15

webengine.dll

4.8.4075.0

26,904

11-Dec-2019

07:15

webengine4.dll

4.8.4075.0

572,184

11-Dec-2019

07:15

WindowsBase.dll

4.8.4110.0

1,306,392

11-Dec-2019

07:15

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

11-Dec-2019

07:15

WPFFontCache_v0400.exe.mui

4.8.4110.0

19,728

11-Dec-2019

07:17

WPFFontCache_v0400.exe

4.8.4110.0

27,464

11-Dec-2019

07:17

wpfgfx_v0400.dll

4.8.4110.0

1,626,392

11-Dec-2019

07:15

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4075.0

49,432

11-Dec-2019

07:17

Aspnet_perf.dll

4.8.4075.0

43,800

11-Dec-2019

07:15

aspnet_wp.exe

4.8.4075.0

53,032

11-Dec-2019

07:17

aspnet_wp.exe

4.8.4075.0

47,608

11-Dec-2019

07:15

clr.dll

4.8.4069.0

11,270,632

11-Dec-2019

07:17

clr.dll

4.8.4069.0

8,044,520

11-Dec-2019

07:15

clrjit.dll

4.8.4069.0

1,365,488

11-Dec-2019

07:17

clrjit.dll

4.8.4069.0

561,640

11-Dec-2019

07:15

compatjit.dll

4.8.4069.0

1,281,000

11-Dec-2019

07:17

mscordacwks.dll

4.8.4069.0

1,808,664

11-Dec-2019

07:17

mscordacwks.dll

4.8.4069.0

1,315,304

11-Dec-2019

07:15

mscordbi.dll

4.8.4069.0

1,661,720

11-Dec-2019

07:17

mscordbi.dll

4.8.4069.0

1,196,008

11-Dec-2019

07:15

mscoreei.dll

4.8.4018.0

688,920

11-Dec-2019

07:17

mscoreei.dll

4.8.4018.0

581,400

11-Dec-2019

07:15

mscorlib.dll

4.8.4069.0

5,439,464

11-Dec-2019

07:17

mscorlib.dll

4.8.4069.0

5,678,360

11-Dec-2019

07:15

VsVersion.dll

14.8.4110.0

19,224

11-Dec-2019

07:34

Placeholder.dll

4.8.4110.0

27,920

11-Dec-2019

07:34

Placeholder.dll

4.8.4110.0

25,880

11-Dec-2019

07:15

VsVersion.dll

14.8.4110.0

19,216

11-Dec-2019

07:15

PenIMC2_v0400.dll

4.8.4110.0

128,280

11-Dec-2019

07:34

PenIMC2_v0400.dll

4.8.4110.0

107,288

11-Dec-2019

07:15

peverify.dll

4.8.4069.0

273,176

11-Dec-2019

07:17

peverify.dll

4.8.4069.0

190,440

11-Dec-2019

07:15

PresentationCore.dll

4.8.4110.0

3,653,400

11-Dec-2019

07:34

PresentationCore.dll

4.8.4110.0

3,676,952

11-Dec-2019

07:15

PresentationFramework.dll

4.8.4110.0

6,269,720

11-Dec-2019

07:15

PresentationFramework-SystemData.dll

4.8.4110.0

25,576

11-Dec-2019

07:15

PresentationHost_v0400.dll

4.8.4110.0

310,040

11-Dec-2019

07:34

PresentationHost_v0400.dll.mui

4.8.4110.0

85,272

11-Dec-2019

07:34

PresentationHost_v0400.dll

4.8.4110.0

241,432

11-Dec-2019

07:15

PresentationHost_v0400.dll.mui

4.8.4110.0

85,264

11-Dec-2019

07:15

PresentationNative_v0400.dll

4.8.4110.0

1,171,736

11-Dec-2019

07:34

PresentationNative_v0400.dll

4.8.4110.0

930,584

11-Dec-2019

07:15

ReachFramework.dll

4.8.4110.0

677,656

11-Dec-2019

07:15

ServiceMonikerSupport.dll

4.8.3825.0

34,560

11-Dec-2019

07:17

ServiceMonikerSupport.dll

4.8.3825.0

31,488

11-Dec-2019

07:15

SMDiagnostics.dll

4.8.3825.0

73,544

11-Dec-2019

07:15

SOS.dll

4.8.4069.0

929,048

11-Dec-2019

07:17

SOS.dll

4.8.4069.0

774,936

11-Dec-2019

07:15

System.Activities.dll

4.8.3825.0

1,533,344

11-Dec-2019

07:15

System.Core.dll

4.8.4110.0

1,556,616

11-Dec-2019

07:15

System.IdentityModel.dll

4.8.3825.0

1,093,960

11-Dec-2019

07:15

System.IdentityModel.Services.dll

4.8.3825.0

198,400

11-Dec-2019

07:15

System.Printing.dll

4.8.4110.0

400,152

11-Dec-2019

07:34

System.Printing.dll

4.8.4110.0

399,640

11-Dec-2019

07:15

System.Runtime.Serialization.dll

4.8.3825.0

1,054,112

11-Dec-2019

07:15

System.ServiceModel.Channels.dll

4.8.3825.0

157,744

11-Dec-2019

07:15

System.ServiceModel.Discovery.dll

4.8.3825.0

308,272

11-Dec-2019

07:15

System.ServiceModel.dll

4.8.3825.0

6,386,504

11-Dec-2019

07:15

System.ServiceModel.Internals.dll

4.8.3825.0

253,344

11-Dec-2019

07:15

System.ServiceModel.WasHosting.dll

4.8.3825.0

40,192

11-Dec-2019

07:15

System.Web.ApplicationServices.dll

4.8.4075.0

71,512

11-Dec-2019

07:15

System.Web.Extensions.dll

4.8.4075.0

1,849,992

11-Dec-2019

07:15

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

11-Dec-2019

07:15

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

11-Dec-2019

07:15

System.Workflow.Runtime.dll

4.8.4110.0

503,064

11-Dec-2019

07:15

System.dll

4.8.4001.0

3,560,496

11-Dec-2019

07:15

System.Web.dll

4.8.4075.0

5,403,624

11-Dec-2019

07:17

System.Web.dll

4.8.4075.0

5,416,728

11-Dec-2019

07:15

System.Windows.Controls.Ribbon.dll

4.8.4110.0

748,032

11-Dec-2019

07:15

System.Windows.Forms.dll

4.8.4042.0

5,920,392

11-Dec-2019

07:15

System.Xaml.dll

4.8.4110.0

640,048

11-Dec-2019

07:15

UIAutomationClient.dll

4.8.4110.0

178,456

11-Dec-2019

07:15

UIAutomationClientsideProviders.dll

4.8.4110.0

361,752

11-Dec-2019

07:15

UIAutomationProvider.dll

4.8.4110.0

49,432

11-Dec-2019

07:15

UIAutomationTypes.dll

4.8.4110.0

223,512

11-Dec-2019

07:15

webengine.dll

4.8.4075.0

28,952

11-Dec-2019

07:17

webengine.dll

4.8.4075.0

26,904

11-Dec-2019

07:15

webengine4.dll

4.8.4075.0

682,776

11-Dec-2019

07:17

webengine4.dll

4.8.4075.0

572,184

11-Dec-2019

07:15

WindowsBase.dll

4.8.4110.0

1,306,392

11-Dec-2019

07:15

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

11-Dec-2019

07:34

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

11-Dec-2019

07:15

WPFFontCache_v0400.exe.mui

4.8.4110.0

19,736

11-Dec-2019

07:34

WPFFontCache_v0400.exe.mui

4.8.4110.0

19,728

11-Dec-2019

07:17

WPFFontCache_v0400.exe

4.8.4110.0

29,720

11-Dec-2019

07:34

WPFFontCache_v0400.exe

4.8.4110.0

27,464

11-Dec-2019

07:17

wpfgfx_v0400.dll

4.8.4110.0

2,058,008

11-Dec-2019

07:34

wpfgfx_v0400.dll

4.8.4110.0

1,626,392

11-Dec-2019

07:15

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