Applies to:

Microsoft .NET Framework 4.8

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).

Additional information about this update

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

  • 4566518 Description of the Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 (KB4566518)

How to obtain and install the update

Before installing this update

Prerequisite:

To apply this update, you must have .NET Framework 4.8 installed.

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.

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 Server 2012

Classification: Security Updates

Prerequisites

To apply this update, you must have .NET Framework 4.8 installed.

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 45351034538157, and 4556400.


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 Server 2012 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

Windows8-RT-KB4565634-x64-NDP48.msu

5CC53D1CB40E8D45DDDAC9B0BC24EC2D9E2B7612

2420A1844AA33C05A3D257DBFE79EDABDAC4433B53EC67DE1CAF5E8A77DC8124

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Mscorlib.dll

4.8.4180.0

5,439,264

26-Mar-2020

23:10

x64

None

Not applicable

Normidna.nlp

Not applicable

59,342

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfc.nlp

Not applicable

47,076

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfd.nlp

Not applicable

40,566

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfkc.nlp

Not applicable

67,808

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfkd.nlp

Not applicable

61,718

02-Aug-2018

01:29

Not applicable

None

Not applicable

Aspnet_perf.dll

4.8.4075.0

49,432

23-Nov-2019

04:37

x64

SPN

AMD64_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

23-Nov-2019

03:21

Not applicable

SPN

AMD64_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

23-Nov-2019

04:38

Not applicable

SPN

AMD64_NETFX4-ASP

Aspnet_wp.exe

4.8.4075.0

53,032

23-Nov-2019

04:37

x64

SPN

AMD64_NETFX4-ASP

Clrjit.dll

4.8.4180.0

1,365,272

26-Mar-2020

23:10

x64

None

Not applicable

Clr.dll

4.8.4180.0

11,251,192

26-Mar-2020

23:10

x64

None

Not applicable

Compatjit.dll

4.8.4180.0

1,280,800

26-Mar-2020

23:10

x64

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

31-Jul-2019

02:08

Not applicable

SPA

AMD64_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

03-Feb-2020

10:17

Not applicable

None

Not applicable

Mscordacwks.dll

4.8.4180.0

1,808,672

26-Mar-2020

23:10

x64

None

Not applicable

Mscordbi.dll

4.8.4180.0

1,662,752

26-Mar-2020

23:10

x64

None

Not applicable

Mscoreei.dll

4.8.4180.0

689,952

26-Mar-2020

23:10

x64

None

Not applicable

Penimc.dll

14.8.4180.0

19,232

26-Mar-2020

23:10

x64

None

Not applicable

Penimc2_v0400.dll

4.8.4180.0

128,288

26-Mar-2020

23:10

x64

None

Not applicable

Penimc_v0400.dll

4.8.4180.0

27,936

26-Mar-2020

23:10

x64

None

Not applicable

Peverify.dll

4.8.4180.0

273,184

26-Mar-2020

23:10

x64

None

Not applicable

Presentationframework-systemdata.dll

4.8.4180.0

25,376

26-Mar-2020

23:11

x86

None

Not applicable

Presentationframework.dll

4.8.4180.0

6,271,264

26-Mar-2020

23:11

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.8.4180.0

85,280

26-Mar-2020

23:10

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.8.4180.0

310,048

26-Mar-2020

23:10

x64

None

Not applicable

Presentationnative_v0400.dll

4.8.4180.0

1,171,744

26-Mar-2020

23:10

x64

None

Not applicable

Reachframework.dll

4.8.4110.0

677,656

04-Dec-2019

02:55

x86

None

Not applicable

Servicemodel.mof

Not applicable

88,383

03-Feb-2020

13:12

Not applicable

None

Not applicable

Servicemodel.mof.uninstall

Not applicable

896

03-Feb-2020

13:12

Not applicable

None

Not applicable

Servicemonikersupport.dll

4.8.4180.0

35,104

26-Mar-2020

23:10

x64

None

Not applicable

Smdiagnostics.dll

4.8.4180.0

73,880

26-Mar-2020

23:11

x86

None

Not applicable

_smsvchostperfcounters.h

Not applicable

702

06-Dec-2019

22:20

Not applicable

None

Not applicable

_smsvchostperfcounters.ini

Not applicable

133,894

07-Dec-2019

06:04

Not applicable

None

Not applicable

_smsvchostperfcounters_d.ini

Not applicable

39

09-Nov-2019

00:37

Not applicable

None

Not applicable

Smsvchost.exe

4.8.4121.0

139,056

07-Dec-2019

06:03

x86

None

Not applicable

Smsvchost.exe.config

Not applicable

2,262

21-Nov-2019

02:58

Not applicable

None

Not applicable

Sos.dll

4.8.4180.0

929,056

26-Mar-2020

23:10

x64

None

Not applicable

System.activities.presentation.dll

4.8.4150.0

2,127,128

09-Jan-2020

19:46

x86

None

Not applicable

System.activities.dll

4.8.4180.0

1,534,312

26-Mar-2020

23:11

x86

None

Not applicable

System.configuration.dll

4.8.4190.0

421,536

05-Jun-2020

05:04

x86

None

Not applicable

System.core.dll

4.8.4180.0

1,556,832

26-Mar-2020

23:11

x86

None

Not applicable

System.identitymodel.services.dll

4.8.4180.0

199,152

26-Mar-2020

23:11

x86

None

Not applicable

System.identitymodel.dll

4.8.4180.0

1,094,504

26-Mar-2020

23:11

x86

None

Not applicable

System.net.sockets.dll

4.8.4121.0

30,360

07-Dec-2019

06:03

x86

None

Not applicable

System.runtime.serialization.dll

4.8.4180.0

1,054,872

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.channels.dll

4.8.4180.0

158,704

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.discovery.dll

4.8.4180.0

309,024

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.internals.dll

4.8.4180.0

254,096

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.washosting.dll

4.8.4180.0

40,736

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.dll

4.8.4180.0

6,389,336

26-Mar-2020

23:11

x86

None

Not applicable

System.web.applicationservices.dll

4.8.4075.0

71,512

23-Nov-2019

05:17

x86

None

Not applicable

System.web.extensions.dll

4.8.4075.0

1,849,992

23-Nov-2019

05:17

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.8.4180.0

751,392

26-Mar-2020

23:11

x86

None

Not applicable

System.windows.forms.dll

4.8.4150.0

5,921,416

09-Jan-2020

19:46

x86

None

Not applicable

System.workflow.activities.dll

4.8.4110.0

1,051,112

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.componentmodel.dll

4.8.4110.0

1,557,272

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.runtime.dll

4.8.4110.0

503,064

04-Dec-2019

02:55

x86

None

Not applicable

System.xaml.dll

4.8.4180.0

640,056

26-Mar-2020

23:11

x86

None

Not applicable

System.dll

4.8.4001.0

3,560,496

24-Jul-2019

02:58

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.8.4180.0

361,760

26-Mar-2020

23:11

x86

None

Not applicable

Uiautomationclient.dll

4.8.4180.0

178,464

26-Mar-2020

23:11

x86

None

Not applicable

Uiautomationprovider.dll

4.8.4180.0

49,648

26-Mar-2020

23:11

x86

None

Not applicable

Uiautomationtypes.dll

4.8.4180.0

223,512

26-Mar-2020

23:11

x86

None

Not applicable

Webengine4.dll

4.8.4075.0

682,776

23-Nov-2019

04:37

x64

None

Not applicable

Webengine.dll

4.8.4075.0

28,952

23-Nov-2019

04:37

x64

None

Not applicable

Windowsbase.dll

4.8.4180.0

1,306,392

26-Mar-2020

23:11

x86

None

Not applicable

Windowsformsintegration.dll

4.8.4150.0

105,240

09-Jan-2020

19:46

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.8.4110.0

102,672

04-Dec-2019

02:54

x64

None

Not applicable

Wpfgfx_v0400.dll

4.8.4180.0

2,058,016

26-Mar-2020

23:10

x64

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

03-Feb-2020

13:25

Not applicable

None

Not applicable

Globalsansserif.compositefont

Not applicable

26,489

03-Feb-2020

13:25

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

03-Feb-2020

13:25

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

03-Feb-2020

13:25

Not applicable

None

Not applicable

Presentationcore.dll

4.8.4180.0

3,652,384

26-Mar-2020

23:10

x64

None

Not applicable

System.data.dll

4.8.4190.0

3,549,488

05-Jun-2020

04:59

x64

None

Not applicable

System.printing.dll

4.8.4110.0

400,152

04-Dec-2019

02:54

x64

None

Not applicable

System.web.dll

4.8.4075.0

5,403,624

23-Nov-2019

04:37

x64

None

Not applicable

Presentationframework-systemdata.dll

4.8.4180.0

25,376

26-Mar-2020

23:11

x86

None

Not applicable

Presentationframework.dll

4.8.4180.0

6,271,264

26-Mar-2020

23:11

x86

None

Not applicable

Reachframework.dll

4.8.4110.0

677,656

04-Dec-2019

02:55

x86

None

Not applicable

Smdiagnostics.dll

4.8.4180.0

73,880

26-Mar-2020

23:11

x86

None

Not applicable

Smsvchost.exe

4.8.4121.0

139,056

07-Dec-2019

06:03

x86

None

Not applicable

System.activities.presentation.dll

4.8.4150.0

2,127,128

09-Jan-2020

19:46

x86

None

Not applicable

System.activities.dll

4.8.4180.0

1,534,312

26-Mar-2020

23:11

x86

None

Not applicable

System.configuration.dll

4.8.4190.0

421,536

05-Jun-2020

05:04

x86

None

Not applicable

System.core.dll

4.8.4180.0

1,556,832

26-Mar-2020

23:11

x86

None

Not applicable

System.identitymodel.services.dll

4.8.4180.0

199,152

26-Mar-2020

23:11

x86

None

Not applicable

System.identitymodel.dll

4.8.4180.0

1,094,504

26-Mar-2020

23:11

x86

None

Not applicable

System.net.sockets.dll

4.8.4121.0

30,360

07-Dec-2019

06:03

x86

None

Not applicable

System.runtime.serialization.dll

4.8.4180.0

1,054,872

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.channels.dll

4.8.4180.0

158,704

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.discovery.dll

4.8.4180.0

309,024

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.internals.dll

4.8.4180.0

254,096

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.washosting.dll

4.8.4180.0

40,736

26-Mar-2020

23:11

x86

None

Not applicable

System.servicemodel.dll

4.8.4180.0

6,389,336

26-Mar-2020

23:11

x86

None

Not applicable

System.web.applicationservices.dll

4.8.4075.0

71,512

23-Nov-2019

05:17

x86

None

Not applicable

System.web.extensions.dll

4.8.4075.0

1,849,992

23-Nov-2019

05:17

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.8.4180.0

751,392

26-Mar-2020

23:11

x86

None

Not applicable

System.windows.forms.dll

4.8.4150.0

5,921,416

09-Jan-2020

19:46

x86

None

Not applicable

System.workflow.activities.dll

4.8.4110.0

1,051,112

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.componentmodel.dll

4.8.4110.0

1,557,272

04-Dec-2019

02:55

x86

None

Not applicable

System.workflow.runtime.dll

4.8.4110.0

503,064

04-Dec-2019

02:55

x86

None

Not applicable

System.xaml.dll

4.8.4180.0

640,056

26-Mar-2020

23:11

x86

None

Not applicable

System.dll

4.8.4001.0

3,560,496

24-Jul-2019

02:58

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.8.4180.0

361,760

26-Mar-2020

23:11

x86

None

Not applicable

Uiautomationclient.dll

4.8.4180.0

178,464

26-Mar-2020

23:11

x86

None

Not applicable

Uiautomationprovider.dll

4.8.4180.0

49,648

26-Mar-2020

23:11

x86

None

Not applicable

Uiautomationtypes.dll

4.8.4180.0

223,512

26-Mar-2020

23:11

x86

None

Not applicable

Windowsbase.dll

4.8.4180.0

1,306,392

26-Mar-2020

23:11

x86

None

Not applicable

Windowsformsintegration.dll

4.8.4150.0

105,240

09-Jan-2020

19:46

x86

None

Not applicable

Mscorlib.dll

4.8.4180.0

5,678,576

26-Mar-2020

23:11

x86

None

Not applicable

Normidna.nlp

Not applicable

59,342

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfc.nlp

Not applicable

47,076

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfd.nlp

Not applicable

40,566

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfkc.nlp

Not applicable

67,808

02-Aug-2018

01:29

Not applicable

None

Not applicable

Normnfkd.nlp

Not applicable

61,718

02-Aug-2018

01:29

Not applicable

None

Not applicable

Aspnet_perf.dll

4.8.4075.0

43,800

23-Nov-2019

05:17

x86

SPN

X86_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

23-Nov-2019

03:12

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

23-Nov-2019

05:18

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_wp.exe

4.8.4075.0

47,608

23-Nov-2019

05:17

x86

SPN

X86_NETFX4-ASP

Clrjit.dll

4.8.4180.0

561,648

26-Mar-2020

23:11

x86

None

Not applicable

Clr.dll

4.8.4180.0

8,044,832

26-Mar-2020

23:11

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

31-Jul-2019

02:08

Not applicable

SPA

X86_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

03-Feb-2020

10:17

Not applicable

None

Not applicable

Mscordacwks.dll

4.8.4180.0

1,315,104

26-Mar-2020

23:11

x86

None

Not applicable

Mscordbi.dll

4.8.4180.0

1,196,320

26-Mar-2020

23:11

x86

None

Not applicable

Mscoreei.dll

4.8.4180.0

581,920

26-Mar-2020

23:11

x86

None

Not applicable

Penimc.dll

14.8.4180.0

19,232

26-Mar-2020

23:11

x86

None

Not applicable

Penimc2_v0400.dll

4.8.4180.0

107,504

26-Mar-2020

23:11

x86

None

Not applicable

Penimc_v0400.dll

4.8.4180.0

26,096

26-Mar-2020

23:11

x86

None

Not applicable

Peverify.dll

4.8.4180.0

190,232

26-Mar-2020

23:11

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.8.4180.0

85,272

26-Mar-2020

23:11

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.8.4180.0

241,648

26-Mar-2020

23:11

x86

None

Not applicable

Presentationnative_v0400.dll

4.8.4180.0

930,808

26-Mar-2020

23:11

x86

None

Not applicable

Servicemonikersupport.dll

4.8.4180.0

32,272

26-Mar-2020

23:11

x86

None

Not applicable

Smsvchost.exe.config

Not applicable

2,262

25-Jul-2019

21:42

Not applicable

None

Not applicable

Sos.dll

4.8.4180.0

774,944

26-Mar-2020

23:11

x86

None

Not applicable

System.core.dll

4.8.4180.0

1,556,832

26-Mar-2020

23:11

x86

None

Not applicable

System.web.extensions.dll

4.8.4075.0

1,849,992

23-Nov-2019

05:17

x86

None

Not applicable

Webengine4.dll

4.8.4075.0

572,184

23-Nov-2019

05:17

x86

None

Not applicable

Webengine.dll

4.8.4075.0

26,904

23-Nov-2019

05:17

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.8.4110.0

89,368

04-Dec-2019

02:55

x86

None

Not applicable

Wpfgfx_v0400.dll

4.8.4180.0

1,626,608

26-Mar-2020

23:11

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globalsansserif.compositefont

Not applicable

26,489

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

31-Jul-2019

02:08

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

264,986

03-Feb-2020

10:17

Not applicable

None

Not applicable

Presentationcore.dll

4.8.4180.0

3,676,440

26-Mar-2020

23:11

x86

None

Not applicable

System.data.dll

4.8.4190.0

3,482,408

05-Jun-2020

05:04

x86

None

Not applicable

System.printing.dll

4.8.4110.0

399,640

04-Dec-2019

02:55

x86

None

Not applicable

System.web.dll

4.8.4075.0

5,416,728

23-Nov-2019

05:17

x86

None

Not applicable

Information about protection and security

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