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Summary

This security update resolves a vulnerability in Microsoft .NET Framework that could allow remote code execution when .NET Framework processes untrusted input. An attacker who successfully exploits this vulnerability in software by using .NET Framework could take control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts that have full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate with administrative user rights.

To exploit the vulnerability, an attacker would first have to convince the user to open a malicious document or application.

This security update addresses the vulnerability by correcting how .NET Framework validates untrusted input.

To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8421.

Important

  • All updates for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 require that 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 update, see KB 4019990 for Windows 7 SP1 and Windows Server 2008 R2 SP1. Or, see KB 4019478 for Windows Server 2008 SP2.

  • 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 more information about this security update as it relates to Windows 7 SP1 and Windows Server 2008 R2 SP1, see the following article in the Microsoft Knowledge Base:

4457918 Security and Quality Rollup updates for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB 4457918)

For more information about this security update as it relates to Windows Server 2008 SP2, see the following article in the Microsoft Knowledge Base:

4457921 Security and Quality Rollup updates for .NET Framework 2.0 SP2, 3.0 SP2, 4.5.2, and 4.6 for Windows Server 2008 SP2 (KB 4457921)

Known issues

After the September 2018 .NET Framework security update is applied to resolve CVE-2018-8421 (.NET Framework remote code execution vulnerability), SharePoint out-of-the-box workflows stop working.

For more information about this known issue, see the following article in the Microsoft Knowledge Base:

4465015 SharePoint Workflows stop working after you install .NET security updates for CVE-2018-8421

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: 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. Install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4457915 in 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 need, 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:

20180911 Security update deployment information: September 11, 2018

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 the following previously released updates:

File information

File hash

File name

SHA1 hash

SHA256 hash

NDP46-KB4457035-x86.exe

5B34DE6A92D4F3823847B3D96E860E378032E7A4

B2708188E883F122FD4EF6776CD176EF70C8B58478A088F4AB0F492DFB5E69D6

NDP46-KB4457035-x64.exe

4291FE54102413FC8B00EB772951FCF412AEC637

4DF214C5934EA4DE95723B0EA8096F8D8B48D8A4FD8D80A1809D5AD543CB2FC8


File attributes for all supported x86-based systems

The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and 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 times may change when you perform certain operations on the files.

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.7.3163.0

44,056

14-Aug-2018

17:38

aspnet_wp.exe

4.7.3163.0

47,584

14-Aug-2018

17:38

clr.dll

4.7.3163.0

7,249,400

14-Aug-2018

17:38

clrjit.dll

4.7.3163.0

524,288

14-Aug-2018

17:38

dfdll.dll

4.7.3163.0

161,280

14-Aug-2018

17:38

GlobalUserInterface.CompositeFont

186,009

14-Aug-2018

17:38

mscordacwks.dll

4.7.3163.0

1,344,536

14-Aug-2018

17:38

mscordbi.dll

4.7.3163.0

1,170,440

14-Aug-2018

17:38

mscoreei.dll

4.7.3163.0

513,032

14-Aug-2018

17:38

mscorlib.dll

4.7.3163.0

5,639,176

14-Aug-2018

17:38

msvcp120_clr0400.dll

12.0.52519.0

485,576

14-Aug-2018

17:41

msvcr120_clr0400.dll

12.0.52519.0

987,840

14-Aug-2018

17:41

VsVersion.dll

14.7.3163.0

20,496

14-Aug-2018

17:38

peverify.dll

4.7.3163.0

189,960

14-Aug-2018

17:38

PresentationCore.dll

4.7.3163.0

3,637,960

14-Aug-2018

17:38

PresentationFramework.dll

4.7.3163.0

6,237,400

14-Aug-2018

17:38

PresentationFramework-SystemData.dll

4.7.3163.0

25,704

14-Aug-2018

17:38

PresentationHost_v0400.dll

4.7.3163.0

215,616

14-Aug-2018

17:38

PresentationHost_v0400.dll.mui

4.7.3163.0

86,096

14-Aug-2018

17:38

PresentationNative_v0400.dll

4.7.3163.0

828,488

14-Aug-2018

17:38

ServiceMonikerSupport.dll

4.7.3163.0

30,784

14-Aug-2018

17:38

SMDiagnostics.dll

4.7.3163.0

76,632

14-Aug-2018

17:38

SOS.dll

4.7.3163.0

744,952

14-Aug-2018

17:38

System.Activities.dll

4.7.3163.0

1,535,344

14-Aug-2018

17:38

System.ComponentModel.DataAnnotations.dll

4.7.3163.0

130,024

14-Aug-2018

17:38

System.Core.dll

4.7.3163.0

1,554,760

14-Aug-2018

17:38

System.Data.Entity.dll

4.7.3163.0

4,035,632

14-Aug-2018

17:38

System.DirectoryServices.AccountManagement.dll

4.7.3163.0

297,624

14-Aug-2018

17:38

System.IdentityModel.dll

4.7.3163.0

1,092,992

14-Aug-2018

17:38

System.IdentityModel.Services.dll

4.7.3163.0

199,776

14-Aug-2018

17:38

System.Runtime.Serialization.dll

4.7.3163.0

1,059,248

14-Aug-2018

17:38

System.ServiceModel.Channels.dll

4.7.3163.0

159,320

14-Aug-2018

17:38

System.ServiceModel.Discovery.dll

4.7.3163.0

309,856

14-Aug-2018

17:38

System.ServiceModel.dll

4.7.3163.0

6,324,600

14-Aug-2018

17:38

System.ServiceModel.Internals.dll

4.7.3163.0

263,600

14-Aug-2018

17:38

System.ServiceModel.Routing.dll

4.7.3163.0

132,184

14-Aug-2018

17:38

System.ServiceModel.WasHosting.dll

4.7.3163.0

39,640

14-Aug-2018

17:38

System.Web.ApplicationServices.dll

4.7.3163.0

73,656

14-Aug-2018

17:38

System.Web.Extensions.dll

4.7.3163.0

1,852,296

14-Aug-2018

17:38

System.Workflow.Activities.dll

4.7.3180.0

1,054,216

14-Aug-2018

17:41

System.Workflow.ComponentModel.dll

4.7.3180.0

1,547,288

14-Aug-2018

17:41

System.Workflow.Runtime.dll

4.7.3180.0

501,752

14-Aug-2018

17:41

System.Runtime.Caching.dll

4.7.3163.0

111,168

14-Aug-2018

17:38

System.Data.dll

4.7.3163.0

3,463,704

14-Aug-2018

17:38

System.Data.SqlXml.dll

4.7.3163.0

737,136

14-Aug-2018

17:38

System.Deployment.dll

4.7.3163.0

882,032

14-Aug-2018

17:38

System.DirectoryServices.Protocols.dll

4.7.3163.0

204,240

14-Aug-2018

17:38

System.dll

4.7.3163.0

3,558,696

14-Aug-2018

17:38

System.Drawing.dll

4.7.3163.0

603,480

14-Aug-2018

17:38

System.Management.dll

4.7.3163.0

418,160

14-Aug-2018

17:38

System.Net.Http.dll

4.7.3163.0

207,200

14-Aug-2018

17:38

System.Runtime.Remoting.dll

4.7.3163.0

350,096

14-Aug-2018

17:38

System.Security.dll

4.7.3163.0

328,544

14-Aug-2018

17:38

System.Transactions.dll

4.7.3163.0

308,792

14-Aug-2018

17:38

System.Web.dll

4.7.3163.0

5,417,488

14-Aug-2018

17:38

System.Windows.Controls.Ribbon.dll

4.7.3163.0

744,032

14-Aug-2018

17:38

System.Windows.Forms.dll

4.7.3163.0

5,239,680

14-Aug-2018

17:38

System.Xaml.dll

4.7.3163.0

644,936

14-Aug-2018

17:38

System.Xml.dll

4.7.3163.0

2,672,960

14-Aug-2018

17:38

UIAutomationClient.dll

4.7.3163.0

179,408

14-Aug-2018

17:38

UIAutomationClientsideProviders.dll

4.7.3163.0

362,760

14-Aug-2018

17:38

UIAutomationProvider.dll

4.7.3163.0

50,392

14-Aug-2018

17:38

UIAutomationTypes.dll

4.7.3163.0

222,408

14-Aug-2018

17:38

webengine.dll

4.7.3163.0

26,128

14-Aug-2018

17:38

webengine4.dll

4.7.3163.0

551,440

14-Aug-2018

17:38

WindowsBase.dll

4.7.3163.0

1,293,488

14-Aug-2018

17:38

WMINet_Utils.dll

4.7.3163.0

137,752

14-Aug-2018

17:38

WorkflowServiceHostPerformanceCounters.dll

4.7.3180.0

92,216

14-Aug-2018

17:40

WPFFontCache_v0400.exe.mui

4.7.3163.0

20,544

14-Aug-2018

17:38

WPFFontCache_v0400.exe

4.7.3163.0

27,104

14-Aug-2018

17:38

wpfgfx_v0400.dll

4.7.3163.0

1,346,584

14-Aug-2018

17:38

Placeholder.dll

4.7.3163.0

26,136

14-Aug-2018

17:38

PenIMC2_v0400.dll

4.7.3163.0

87,584

14-Aug-2018

17:38

File attributes for all supported x64-based systems

The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and 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 times may change when you perform certain operations on the files.

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.7.3163.0

47,640

14-Aug-2018

17:38

Aspnet_perf.dll

4.7.3163.0

44,056

14-Aug-2018

17:38

aspnet_wp.exe

4.7.3163.0

52,192

14-Aug-2018

17:38

aspnet_wp.exe

4.7.3163.0

47,584

14-Aug-2018

17:38

clr.dll

4.7.3163.0

10,377,200

14-Aug-2018

17:38

clr.dll

4.7.3163.0

7,249,400

14-Aug-2018

17:38

clrjit.dll

4.7.3163.0

1,224,192

14-Aug-2018

17:38

clrjit.dll

4.7.3163.0

524,288

14-Aug-2018

17:38

compatjit.dll

4.7.3163.0

1,261,072

14-Aug-2018

17:38

dfdll.dll

4.7.3163.0

193,024

14-Aug-2018

17:38

dfdll.dll

4.7.3163.0

161,280

14-Aug-2018

17:38

GlobalUserInterface.CompositeFont

186,009

14-Aug-2018

17:38

mscordacwks.dll

4.7.3163.0

1,842,200

14-Aug-2018

17:38

mscordacwks.dll

4.7.3163.0

1,344,536

14-Aug-2018

17:38

mscordbi.dll

4.7.3163.0

1,623,560

14-Aug-2018

17:38

mscordbi.dll

4.7.3163.0

1,170,440

14-Aug-2018

17:38

mscoreei.dll

4.7.3163.0

631,816

14-Aug-2018

17:38

mscoreei.dll

4.7.3163.0

513,032

14-Aug-2018

17:38

mscorlib.dll

4.7.3163.0

5,417,592

14-Aug-2018

17:38

mscorlib.dll

4.7.3163.0

5,639,176

14-Aug-2018

17:38

msvcp120_clr0400.dll

12.0.52519.0

690,008

14-Aug-2018

18:00

msvcp120_clr0400.dll

12.0.52519.0

485,576

14-Aug-2018

17:41

msvcr120_clr0400.dll

12.0.52519.0

993,632

14-Aug-2018

18:00

msvcr120_clr0400.dll

12.0.52519.0

987,840

14-Aug-2018

17:41

VsVersion.dll

14.7.3163.0

20,496

14-Aug-2018

17:38

VsVersion.dll

14.7.3163.0

20,496

14-Aug-2018

17:38

peverify.dll

4.7.3163.0

261,640

14-Aug-2018

17:38

peverify.dll

4.7.3163.0

189,960

14-Aug-2018

17:38

PresentationCore.dll

4.7.3163.0

3,614,760

14-Aug-2018

17:38

PresentationCore.dll

4.7.3163.0

3,637,960

14-Aug-2018

17:38

PresentationFramework.dll

4.7.3163.0

6,237,400

14-Aug-2018

17:38

PresentationFramework-SystemData.dll

4.7.3163.0

25,704

14-Aug-2018

17:38

PresentationHost_v0400.dll

4.7.3163.0

279,104

14-Aug-2018

17:38

PresentationHost_v0400.dll.mui

4.7.3163.0

86,096

14-Aug-2018

17:38

PresentationHost_v0400.dll

4.7.3163.0

215,616

14-Aug-2018

17:38

PresentationHost_v0400.dll.mui

4.7.3163.0

86,096

14-Aug-2018

17:38

PresentationNative_v0400.dll

4.7.3163.0

1,111,112

14-Aug-2018

17:38

PresentationNative_v0400.dll

4.7.3163.0

828,488

14-Aug-2018

17:38

ServiceMonikerSupport.dll

4.7.3163.0

32,832

14-Aug-2018

17:38

ServiceMonikerSupport.dll

4.7.3163.0

30,784

14-Aug-2018

17:38

SMDiagnostics.dll

4.7.3163.0

76,632

14-Aug-2018

17:38

SOS.dll

4.7.3163.0

873,464

14-Aug-2018

17:38

SOS.dll

4.7.3163.0

744,952

14-Aug-2018

17:38

System.Activities.dll

4.7.3163.0

1,535,344

14-Aug-2018

17:38

System.ComponentModel.DataAnnotations.dll

4.7.3163.0

130,024

14-Aug-2018

17:38

System.Core.dll

4.7.3163.0

1,554,760

14-Aug-2018

17:38

System.Data.Entity.dll

4.7.3163.0

4,035,632

14-Aug-2018

17:38

System.DirectoryServices.AccountManagement.dll

4.7.3163.0

297,624

14-Aug-2018

17:38

System.IdentityModel.dll

4.7.3163.0

1,092,992

14-Aug-2018

17:38

System.IdentityModel.Services.dll

4.7.3163.0

199,776

14-Aug-2018

17:38

System.Runtime.Serialization.dll

4.7.3163.0

1,059,248

14-Aug-2018

17:38

System.ServiceModel.Channels.dll

4.7.3163.0

159,320

14-Aug-2018

17:38

System.ServiceModel.Discovery.dll

4.7.3163.0

309,856

14-Aug-2018

17:38

System.ServiceModel.dll

4.7.3163.0

6,324,600

14-Aug-2018

17:38

System.ServiceModel.Internals.dll

4.7.3163.0

263,600

14-Aug-2018

17:38

System.ServiceModel.Routing.dll

4.7.3163.0

132,184

14-Aug-2018

17:38

System.ServiceModel.WasHosting.dll

4.7.3163.0

39,640

14-Aug-2018

17:38

System.Web.ApplicationServices.dll

4.7.3163.0

73,656

14-Aug-2018

17:38

System.Web.Extensions.dll

4.7.3163.0

1,852,296

14-Aug-2018

17:38

System.Workflow.Activities.dll

4.7.3180.0

1,054,216

14-Aug-2018

17:41

System.Workflow.ComponentModel.dll

4.7.3180.0

1,547,288

14-Aug-2018

17:41

System.Workflow.Runtime.dll

4.7.3180.0

501,752

14-Aug-2018

17:41

System.Runtime.Caching.dll

4.7.3163.0

111,168

14-Aug-2018

17:38

System.Data.dll

4.7.3163.0

3,523,720

14-Aug-2018

17:38

System.Data.dll

4.7.3163.0

3,463,704

14-Aug-2018

17:38

System.Data.SqlXml.dll

4.7.3163.0

737,136

14-Aug-2018

17:38

System.Deployment.dll

4.7.3163.0

882,032

14-Aug-2018

17:38

System.DirectoryServices.Protocols.dll

4.7.3163.0

204,240

14-Aug-2018

17:38

System.dll

4.7.3163.0

3,558,696

14-Aug-2018

17:38

System.Drawing.dll

4.7.3163.0

603,480

14-Aug-2018

17:38

System.Management.dll

4.7.3163.0

418,160

14-Aug-2018

17:38

System.Net.Http.dll

4.7.3163.0

207,200

14-Aug-2018

17:38

System.Runtime.Remoting.dll

4.7.3163.0

350,096

14-Aug-2018

17:38

System.Security.dll

4.7.3163.0

328,544

14-Aug-2018

17:38

System.Transactions.dll

4.7.3163.0

310,440

14-Aug-2018

17:38

System.Transactions.dll

4.7.3163.0

308,792

14-Aug-2018

17:38

System.Web.dll

4.7.3163.0

5,398,144

14-Aug-2018

17:38

System.Web.dll

4.7.3163.0

5,417,488

14-Aug-2018

17:38

System.Windows.Controls.Ribbon.dll

4.7.3163.0

744,032

14-Aug-2018

17:38

System.Windows.Forms.dll

4.7.3163.0

5,239,680

14-Aug-2018

17:38

System.Xaml.dll

4.7.3163.0

644,936

14-Aug-2018

17:38

System.XML.dll

4.7.3163.0

2,672,960

14-Aug-2018

17:38

UIAutomationClient.dll

4.7.3163.0

179,408

14-Aug-2018

17:38

UIAutomationClientsideProviders.dll

4.7.3163.0

362,760

14-Aug-2018

17:38

UIAutomationProvider.dll

4.7.3163.0

50,392

14-Aug-2018

17:38

UIAutomationTypes.dll

4.7.3163.0

222,408

14-Aug-2018

17:38

webengine.dll

4.7.3163.0

27,664

14-Aug-2018

17:38

webengine.dll

4.7.3163.0

26,128

14-Aug-2018

17:38

webengine4.dll

4.7.3163.0

668,688

14-Aug-2018

17:38

webengine4.dll

4.7.3163.0

551,440

14-Aug-2018

17:38

WindowsBase.dll

4.7.3163.0

1,293,488

14-Aug-2018

17:38

WMINet_Utils.dll

4.7.3163.0

189,464

14-Aug-2018

17:38

WMINet_Utils.dll

4.7.3163.0

137,752

14-Aug-2018

17:38

WorkflowServiceHostPerformanceCounters.dll

4.7.3180.0

103,992

14-Aug-2018

18:00

WorkflowServiceHostPerformanceCounters.dll

4.7.3180.0

92,216

14-Aug-2018

17:40

WPFFontCache_v0400.exe.mui

4.7.3163.0

20,544

14-Aug-2018

17:38

WPFFontCache_v0400.exe.mui

4.7.3163.0

20,544

14-Aug-2018

17:38

WPFFontCache_v0400.exe

4.7.3163.0

28,128

14-Aug-2018

17:38

WPFFontCache_v0400.exe

4.7.3163.0

27,104

14-Aug-2018

17:38

wpfgfx_v0400.dll

4.7.3163.0

1,765,912

14-Aug-2018

17:38

wpfgfx_v0400.dll

4.7.3163.0

1,346,584

14-Aug-2018

17:38

Placeholder.dll

4.7.3163.0

27,160

14-Aug-2018

17:38

Placeholder.dll

4.7.3163.0

26,136

14-Aug-2018

17:38

PenIMC2_v0400.dll

4.7.3163.0

106,016

14-Aug-2018

17:38

PenIMC2_v0400.dll

4.7.3163.0

87,584

14-Aug-2018

17:38

How to obtain help and support for this security update

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