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

Notice

On July 23, 2020, update KB4565623 v2 was released to replace v1 for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 7 SP1 and Windows Server 2008 R2 SP1 and Windows Server 2008 SP2. The v1 update did not install for customers who had certain ESU configurations.  The v2 update corrects the issue for customers who could not install the v1 update.  


If you have already installed KB4565623 v1, no action is necessary.  


To obtain KB4565623 v2, see the “How to obtain and install the update” section.

IMPORTANT Verify that you have installed the required updates listed in the How to get this update section before installing this update. 

IMPORTANT Some customers who use Windows Server 2008 R2 SP1 and have activated their ESU multiple activation key (MAK) add-on before installing the January 14, 2020 updates might need to re-activate their key. Re-activation on the affected devices should only be required once.  For information on activation, see this blog post.

IMPORTANT WSUS scan cab files will continue to be available for Windows 7 SP1 and Windows Server 2008 R2 SP1. If you have a subset of devices running these operating systems without ESU, they might show as non-compliant in your patch management and compliance toolsets.

IMPORTANT Customers who have purchased the Extended Security Update (ESU) for on-premises versions of these operating systems must follow the procedures in KB4522133 to continue receiving security updates after extended support ends on January 14, 2020. For more information on ESU and which editions are supported, see KB4497181.

IMPORTANT Starting on January 15, 2020, a full-screen notification will appear that describes the risk of continuing to use Windows 7 Service Pack 1 after it reaches end of support on January 14, 2020. The notification will remain on the screen until you interact with it. This notification will only appear on the following editions of Windows 7 Service Pack 1:

Note The notification will not appear on domain-joined machines or machines in kiosk mode.

IMPORTANT Starting in August, 2019, updates to .NET Framework 4.6 and above, for 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.

IMPORTANT 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.

IMPORTANT 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.

Summary

A remote code execution vulnerability exists in .NET Framework when the software fails to check the source markup of XML file input. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the process responsible for deserialization of the XML content. To exploit this vulnerability, an attacker could upload a specially crafted document to a server utilizing an affected product to process content. The security update addresses the vulnerability by correcting how .NET Framework validates the source markup of XML content.

This security update affects how .NET Framework's System.Data.DataTable and System.Data.DataSet types read XML-serialized data. Most .NET Framework applications will not experience any behavioral change after the update is installed. For more information on how the update affects .NET Framework, including examples of scenarios which may be affected, please see the DataTable and DataSet security guidance document at https://go.microsoft.com/fwlink/?linkid=2132227.

To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).

Known issues in this update

Symptom

This update does not install, and it returns either or both of the following error messages:

  • -2146762495

  • A required certificate is not within its validity period when verifying against the current system clock or the timestamp in the signed file.

Workaround

This issue has been corrected in the latest Security and Quality Rollup for .NET Framework. 

Additional information about this update

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

  • 4566520 Description of the Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 SP2 (KB4566520)

  • 4566517 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 (KB4566517)

How to obtain and install the update

Before installing this update

Prerequisite:

To apply this update, you must have .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 installed.

You must install the updates listed below and restart your device before installing the latest Rollup. Installing these updates improves the reliability of the update process and mitigates potential issues while installing the Rollup and applying Microsoft security fixes.

  1. The March 12, 2019 servicing stack update (SSU) (KB4490628). To get the standalone package for this SSU, search for it in the Microsoft Update Catalog. This update is required to install updates that are only SHA-2 signed.

  2. The latest SHA-2 update (KB4474419) released September 10, 2019. If you are using Windows Update, the latest SHA-2 update will be offered to you automatically. This update is required to install updates that are only SHA-2 signed. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.

  3. The Extended Security Updates (ESU) Licensing Preparation Package (KB4538483) released February 11, 2020. The ESU licensing preparation package will be offered to you from WSUS. To get the standalone package for ESU licensing preparation package, search for it in the Microsoft Update Catalog.

Install this update

Release Channel

Available

Next Step

Windows Update and Microsoft Update

Yes

None. This update will be downloaded and installed automatically from Windows Update if you are an ESU customer.

Microsoft Update Catalog

Yes

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

Windows Server Update Services (WSUS)

Yes

This update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1,Windows Embedded Standard 7 Service Pack 1, Windows Embedded POSReady 7

Classification: Security Updates

Restart requirement

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

Update deployment information

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

20200714 Security update deployment information: July 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 4535102 and 4556399 for Windows 7 SP1 and Windows Server 2008 R2 SP1, and 4535105 and 4556402 for Windows Server 2008 SP2.

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

4.7.3535.0

43,496

08-Jun-2020

05:07

aspnet_wp.exe

4.7.3535.0

47,096

08-Jun-2020

05:07

clr.dll

4.7.3620.0

7,255,032

08-Jun-2020

05:07

clrjit.dll

4.7.3620.0

523,760

08-Jun-2020

05:07

dfdll.dll

4.7.3221.0

159,952

08-Jun-2020

05:07

GlobalUserInterface.CompositeFont

186,009

08-Jun-2020

05:07

mscordacwks.dll

4.7.3620.0

1,344,016

08-Jun-2020

05:07

mscordbi.dll

4.7.3620.0

1,169,696

08-Jun-2020

05:07

mscoreei.dll

4.7.3468.0

512,488

08-Jun-2020

05:07

mscorlib.dll

4.7.3620.0

5,646,328

08-Jun-2020

05:07

msvcp120_clr0400.dll

12.0.52519.0

485,576

08-Jun-2020

05:11

msvcr120_clr0400.dll

12.0.52519.0

987,840

08-Jun-2020

05:11

VsVersion.dll

14.7.3620.0

19,952

08-Jun-2020

05:07

peverify.dll

4.7.3620.0

189,208

08-Jun-2020

05:07

PresentationCore.dll

4.7.3620.0

3,637,232

08-Jun-2020

05:07

PresentationFramework.dll

4.7.3620.0

6,245,360

08-Jun-2020

05:07

PresentationFramework-SystemData.dll

4.7.3620.0

25,072

08-Jun-2020

05:07

PresentationHost_v0400.dll

4.7.3620.0

215,024

08-Jun-2020

05:07

PresentationHost_v0400.dll.mui

4.7.3620.0

85,488

08-Jun-2020

05:07

PresentationNative_v0400.dll

4.7.3620.0

827,888

08-Jun-2020

05:07

ReachFramework.dll

4.7.3570.0

677,656

08-Jun-2020

05:07

ServiceMonikerSupport.dll

4.7.3620.0

30,192

08-Jun-2020

05:07

SMDiagnostics.dll

4.7.3620.0

74,840

08-Jun-2020

05:07

SMSvcHost.exe

4.7.3515.0

139,264

08-Jun-2020

05:07

SOS.dll

4.7.3620.0

744,440

08-Jun-2020

05:07

System.Activities.dll

4.7.3620.0

1,534,008

08-Jun-2020

05:07

System.ComponentModel.DataAnnotations.dll

4.7.3221.0

127,400

08-Jun-2020

05:07

System.Core.dll

4.7.3620.0

1,552,960

08-Jun-2020

05:07

System.Data.Entity.dll

4.7.3221.0

4,035,664

08-Jun-2020

05:07

System.DirectoryServices.AccountManagement.dll

4.7.3221.0

297,648

08-Jun-2020

05:07

System.IdentityModel.dll

4.7.3620.0

1,095,736

08-Jun-2020

05:07

System.IdentityModel.Services.dll

4.7.3620.0

199,160

08-Jun-2020

05:07

System.Printing.dll

4.7.3570.0

374,032

08-Jun-2020

05:07

System.Runtime.Serialization.dll

4.7.3620.0

1,057,336

08-Jun-2020

05:07

System.ServiceModel.Channels.dll

4.7.3620.0

158,704

08-Jun-2020

05:07

System.ServiceModel.Discovery.dll

4.7.3620.0

309,232

08-Jun-2020

05:07

System.ServiceModel.dll

4.7.3620.0

6,324,792

08-Jun-2020

05:07

System.ServiceModel.Internals.dll

4.7.3620.0

261,688

08-Jun-2020

05:07

System.ServiceModel.Routing.dll

4.7.3221.0

132,208

08-Jun-2020

05:07

System.ServiceModel.WasHosting.dll

4.7.3620.0

40,944

08-Jun-2020

05:07

System.Web.ApplicationServices.dll

4.7.3535.0

71,744

08-Jun-2020

05:07

System.Web.Extensions.dll

4.7.3535.0

1,850,952

08-Jun-2020

05:07

System.Workflow.Activities.dll

4.7.3570.0

1,052,136

08-Jun-2020

05:07

System.Workflow.ComponentModel.dll

4.7.3570.0

1,553,896

08-Jun-2020

05:07

System.Workflow.Runtime.dll

4.7.3570.0

499,480

08-Jun-2020

05:07

System.Runtime.Caching.dll

4.7.3221.0

109,864

08-Jun-2020

05:07

System.Configuration.dll

4.7.3630.0

420,512

08-Jun-2020

05:07

System.Data.dll

4.7.3630.0

3,470,632

08-Jun-2020

05:11

System.Data.SqlXml.dll

4.7.3221.0

734,520

08-Jun-2020

05:07

System.Deployment.dll

4.7.3221.0

879,408

08-Jun-2020

05:07

System.DirectoryServices.Protocols.dll

4.7.3221.0

201,624

08-Jun-2020

05:07

System.dll

4.7.3451.0

3,564,168

08-Jun-2020

05:07

System.Drawing.dll

4.7.3221.0

600,864

08-Jun-2020

05:07

System.Management.dll

4.7.3221.0

415,536

08-Jun-2020

05:07

System.Net.Http.dll

4.7.3221.0

204,584

08-Jun-2020

05:07

System.Runtime.Remoting.dll

4.7.3221.0

347,472

08-Jun-2020

05:07

System.Security.dll

4.7.3221.0

325,928

08-Jun-2020

05:07

System.Transactions.dll

4.7.3221.0

309,328

08-Jun-2020

05:07

System.Web.dll

4.7.3535.0

5,416,424

08-Jun-2020

05:07

System.Windows.Controls.Ribbon.dll

4.7.3620.0

746,992

08-Jun-2020

05:07

System.Windows.Forms.dll

4.7.3515.0

5,238,920

08-Jun-2020

05:07

System.Xaml.dll

4.7.3620.0

643,128

08-Jun-2020

05:07

System.Xml.dll

4.7.3221.0

2,670,344

08-Jun-2020

05:07

UIAutomationClient.dll

4.7.3620.0

178,672

08-Jun-2020

05:07

UIAutomationClientsideProviders.dll

4.7.3620.0

361,968

08-Jun-2020

05:07

UIAutomationProvider.dll

4.7.3620.0

49,648

08-Jun-2020

05:07

UIAutomationTypes.dll

4.7.3620.0

221,680

08-Jun-2020

05:07

webengine.dll

4.7.3535.0

25,368

08-Jun-2020

05:07

webengine4.dll

4.7.3535.0

550,888

08-Jun-2020

05:07

WindowsBase.dll

4.7.3620.0

1,296,904

08-Jun-2020

05:07

WMINet_Utils.dll

4.7.3221.0

136,432

08-Jun-2020

05:07

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

89,880

08-Jun-2020

05:07

WPFFontCache_v0400.exe.mui

4.7.3620.0

19,952

08-Jun-2020

05:07

WPFFontCache_v0400.exe

4.7.3620.0

26,664

08-Jun-2020

05:07

wpfgfx_v0400.dll

4.7.3620.0

1,346,544

08-Jun-2020

05:07

Placeholder.dll

4.7.3620.0

25,584

08-Jun-2020

05:07

PenIMC2_v0400.dll

4.7.3620.0

87,024

08-Jun-2020

05:07

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.7.3535.0

47,080

08-Jun-2020

05:07

Aspnet_perf.dll

4.7.3535.0

43,496

08-Jun-2020

05:07

aspnet_wp.exe

4.7.3535.0

51,704

08-Jun-2020

05:07

aspnet_wp.exe

4.7.3535.0

47,096

08-Jun-2020

05:07

clr.dll

4.7.3620.0

10,375,456

08-Jun-2020

05:07

clr.dll

4.7.3620.0

7,255,032

08-Jun-2020

05:07

clrjit.dll

4.7.3620.0

1,222,640

08-Jun-2020

05:07

clrjit.dll

4.7.3620.0

523,760

08-Jun-2020

05:07

compatjit.dll

4.7.3620.0

1,260,528

08-Jun-2020

05:07

dfdll.dll

4.7.3221.0

191,696

08-Jun-2020

05:07

dfdll.dll

4.7.3221.0

159,952

08-Jun-2020

05:07

GlobalUserInterface.CompositeFont

186,009

08-Jun-2020

05:07

mscordacwks.dll

4.7.3620.0

1,841,648

08-Jun-2020

05:07

mscordacwks.dll

4.7.3620.0

1,344,016

08-Jun-2020

05:07

mscordbi.dll

4.7.3620.0

1,622,816

08-Jun-2020

05:07

mscordbi.dll

4.7.3620.0

1,169,696

08-Jun-2020

05:07

mscoreei.dll

4.7.3468.0

631,272

08-Jun-2020

05:07

mscoreei.dll

4.7.3468.0

512,488

08-Jun-2020

05:07

mscorlib.dll

4.7.3620.0

5,428,216

08-Jun-2020

05:07

mscorlib.dll

4.7.3620.0

5,646,328

08-Jun-2020

05:07

msvcp120_clr0400.dll

12.0.52519.0

690,008

08-Jun-2020

05:07

msvcp120_clr0400.dll

12.0.52519.0

485,576

08-Jun-2020

05:11

msvcr120_clr0400.dll

12.0.52519.0

993,632

08-Jun-2020

05:07

msvcr120_clr0400.dll

12.0.52519.0

987,840

08-Jun-2020

05:11

VsVersion.dll

14.7.3620.0

19,960

08-Jun-2020

05:07

VsVersion.dll

14.7.3620.0

19,952

08-Jun-2020

05:07

peverify.dll

4.7.3620.0

261,624

08-Jun-2020

05:07

peverify.dll

4.7.3620.0

189,208

08-Jun-2020

05:07

PresentationCore.dll

4.7.3620.0

3,614,496

08-Jun-2020

05:07

PresentationCore.dll

4.7.3620.0

3,637,232

08-Jun-2020

05:07

PresentationFramework.dll

4.7.3620.0

6,245,360

08-Jun-2020

05:07

PresentationFramework-SystemData.dll

4.7.3620.0

25,072

08-Jun-2020

05:07

PresentationHost_v0400.dll

4.7.3620.0

278,304

08-Jun-2020

05:07

PresentationHost_v0400.dll.mui

4.7.3620.0

85,280

08-Jun-2020

05:07

PresentationHost_v0400.dll

4.7.3620.0

215,024

08-Jun-2020

05:07

PresentationHost_v0400.dll.mui

4.7.3620.0

85,488

08-Jun-2020

05:07

PresentationNative_v0400.dll

4.7.3620.0

1,110,304

08-Jun-2020

05:07

PresentationNative_v0400.dll

4.7.3620.0

827,888

08-Jun-2020

05:07

ReachFramework.dll

4.7.3570.0

677,656

08-Jun-2020

05:07

ServiceMonikerSupport.dll

4.7.3620.0

32,240

08-Jun-2020

05:07

ServiceMonikerSupport.dll

4.7.3620.0

30,192

08-Jun-2020

05:07

SMDiagnostics.dll

4.7.3620.0

74,840

08-Jun-2020

05:07

SMSvcHost.exe

4.7.3515.0

139,264

08-Jun-2020

05:07

SOS.dll

4.7.3620.0

872,952

08-Jun-2020

05:07

SOS.dll

4.7.3620.0

744,440

08-Jun-2020

05:07

System.Activities.dll

4.7.3620.0

1,534,008

08-Jun-2020

05:07

System.ComponentModel.DataAnnotations.dll

4.7.3221.0

127,400

08-Jun-2020

05:07

System.Core.dll

4.7.3620.0

1,552,960

08-Jun-2020

05:07

System.Data.Entity.dll

4.7.3221.0

4,035,664

08-Jun-2020

05:07

System.DirectoryServices.AccountManagement.dll

4.7.3221.0

297,648

08-Jun-2020

05:07

System.IdentityModel.dll

4.7.3620.0

1,095,736

08-Jun-2020

05:07

System.IdentityModel.Services.dll

4.7.3620.0

199,160

08-Jun-2020

05:07

System.Printing.dll

4.7.3570.0

374,552

08-Jun-2020

05:07

System.Printing.dll

4.7.3570.0

374,032

08-Jun-2020

05:07

System.Runtime.Serialization.dll

4.7.3620.0

1,057,336

08-Jun-2020

05:07

System.ServiceModel.Channels.dll

4.7.3620.0

158,704

08-Jun-2020

05:07

System.ServiceModel.Discovery.dll

4.7.3620.0

309,232

08-Jun-2020

05:07

System.ServiceModel.dll

4.7.3620.0

6,324,792

08-Jun-2020

05:07

System.ServiceModel.Internals.dll

4.7.3620.0

261,688

08-Jun-2020

05:07

System.ServiceModel.Routing.dll

4.7.3221.0

132,208

08-Jun-2020

05:07

System.ServiceModel.WasHosting.dll

4.7.3620.0

40,944

08-Jun-2020

05:07

System.Web.ApplicationServices.dll

4.7.3535.0

71,744

08-Jun-2020

05:07

System.Web.Extensions.dll

4.7.3535.0

1,850,952

08-Jun-2020

05:07

System.Workflow.Activities.dll

4.7.3570.0

1,052,136

08-Jun-2020

05:07

System.Workflow.ComponentModel.dll

4.7.3570.0

1,553,896

08-Jun-2020

05:07

System.Workflow.Runtime.dll

4.7.3570.0

499,480

08-Jun-2020

05:07

System.Runtime.Caching.dll

4.7.3221.0

109,864

08-Jun-2020

05:07

System.configuration.dll

4.7.3630.0

420,512

08-Jun-2020

05:07

System.Data.dll

4.7.3630.0

3,532,584

08-Jun-2020

05:07

System.Data.dll

4.7.3630.0

3,470,632

08-Jun-2020

05:11

System.Data.SqlXml.dll

4.7.3221.0

734,520

08-Jun-2020

05:07

System.Deployment.dll

4.7.3221.0

879,408

08-Jun-2020

05:07

System.DirectoryServices.Protocols.dll

4.7.3221.0

201,624

08-Jun-2020

05:07

System.dll

4.7.3451.0

3,564,168

08-Jun-2020

05:07

System.Drawing.dll

4.7.3221.0

600,864

08-Jun-2020

05:07

System.Management.dll

4.7.3221.0

415,536

08-Jun-2020

05:07

System.Net.Http.dll

4.7.3221.0

204,584

08-Jun-2020

05:07

System.Runtime.Remoting.dll

4.7.3221.0

347,472

08-Jun-2020

05:07

System.Security.dll

4.7.3221.0

325,928

08-Jun-2020

05:07

System.Transactions.dll

4.7.3221.0

311,048

08-Jun-2020

05:07

System.Transactions.dll

4.7.3221.0

309,328

08-Jun-2020

05:07

System.Web.dll

4.7.3535.0

5,399,528

08-Jun-2020

05:07

System.Web.dll

4.7.3535.0

5,416,424

08-Jun-2020

05:07

System.Windows.Controls.Ribbon.dll

4.7.3620.0

746,992

08-Jun-2020

05:07

System.Windows.Forms.dll

4.7.3515.0

5,238,920

08-Jun-2020

05:07

System.Xaml.dll

4.7.3620.0

643,128

08-Jun-2020

05:07

System.XML.dll

4.7.3221.0

2,670,344

08-Jun-2020

05:07

UIAutomationClient.dll

4.7.3620.0

178,672

08-Jun-2020

05:07

UIAutomationClientsideProviders.dll

4.7.3620.0

361,968

08-Jun-2020

05:07

UIAutomationProvider.dll

4.7.3620.0

49,648

08-Jun-2020

05:07

UIAutomationTypes.dll

4.7.3620.0

221,680

08-Jun-2020

05:07

webengine.dll

4.7.3535.0

26,904

08-Jun-2020

05:07

webengine.dll

4.7.3535.0

25,368

08-Jun-2020

05:07

webengine4.dll

4.7.3535.0

667,928

08-Jun-2020

05:07

webengine4.dll

4.7.3535.0

550,888

08-Jun-2020

05:07

WindowsBase.dll

4.7.3620.0

1,296,904

08-Jun-2020

05:07

WMINet_Utils.dll

4.7.3221.0

188,144

08-Jun-2020

05:07

WMINet_Utils.dll

4.7.3221.0

136,432

08-Jun-2020

05:07

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

101,656

08-Jun-2020

05:07

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

89,880

08-Jun-2020

05:07

WPFFontCache_v0400.exe.mui

4.7.3620.0

19,960

08-Jun-2020

05:07

WPFFontCache_v0400.exe.mui

4.7.3620.0

19,952

08-Jun-2020

05:07

WPFFontCache_v0400.exe

4.7.3620.0

27,472

08-Jun-2020

05:07

WPFFontCache_v0400.exe

4.7.3620.0

26,664

08-Jun-2020

05:07

wpfgfx_v0400.dll

4.7.3620.0

1,766,392

08-Jun-2020

05:07

wpfgfx_v0400.dll

4.7.3620.0

1,346,544

08-Jun-2020

05:07

Placeholder.dll

4.7.3620.0

26,616

08-Jun-2020

05:07

Placeholder.dll

4.7.3620.0

25,584

08-Jun-2020

05:07

PenIMC2_v0400.dll

4.7.3620.0

105,464

08-Jun-2020

05:07

PenIMC2_v0400.dll

4.7.3620.0

87,024

08-Jun-2020

05:07

Information about protection and security

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