Applies to:

Microsoft .NET Framework 4.8

Summary

This security update addresses an issue where an unauthenticated attacker could cause a denial of service on an affected system. For more information please see CVE-2022-21911.

Known issues in this update

Microsoft is not currently aware of any issues in this update.

Additional information about this update

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

  • 5009712 Description of the Security Only Update 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 (KB5009712)

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

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

Restart requirement

You may need to 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:

20220111 Security update deployment information: January 11, 2022

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

File hash information

File name

SHA256 hash

Windows8-RT-KB5008896-x64-NDP48.msu

AC41ED10D72FC0587C6C7213B0E4EEAF87EF56560027F944E58024DCBAACC635

Windows8-RT-KB5008896-x86-NDP48.msu

9DF0C897BEE9CE4C55B7671B7A18DF2EC30B08949DFF1FE3A4A0D45FCC3CFCBD

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Aspnet_perf.dll

4.8.4465.0

41,864

19-Nov-2021

23:40

x64

SPN

AMD64_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

19-Nov-2021

22:00

Not applicable

SPN

AMD64_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

19-Nov-2021

23:41

Not applicable

SPN

AMD64_NETFX4-ASP

Aspnet_wp.exe

4.8.4465.0

45,464

19-Nov-2021

23:40

x64

SPN

AMD64_NETFX4-ASP

System.web.applicationservices.dll

4.8.4465.0

63,736

19-Nov-2021

23:42

x86

None

Not applicable

System.web.extensions.dll

4.8.4465.0

1,842,456

19-Nov-2021

23:42

x86

None

Not applicable

Webengine4.dll

4.8.4465.0

675,192

19-Nov-2021

23:40

x64

None

Not applicable

Webengine.dll

4.8.4465.0

21,392

19-Nov-2021

23:40

x64

None

Not applicable

System.web.dll

4.8.4465.0

5,397,384

19-Nov-2021

23:40

x64

None

Not applicable

System.web.applicationservices.dll

4.8.4465.0

63,736

19-Nov-2021

23:42

x86

None

Not applicable

System.web.extensions.dll

4.8.4465.0

1,842,456

19-Nov-2021

23:42

x86

None

Not applicable

Aspnet_perf.dll

4.8.4465.0

36,232

19-Nov-2021

23:42

x86

SPN

X86_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

19-Nov-2021

22:11

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

19-Nov-2021

23:44

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_wp.exe

4.8.4465.0

39,832

19-Nov-2021

23:42

x86

SPN

X86_NETFX4-ASP

System.web.extensions.dll

4.8.4465.0

1,842,456

19-Nov-2021

23:42

x86

None

Not applicable

Webengine4.dll

4.8.4465.0

564,616

19-Nov-2021

23:42

x86

None

Not applicable

Webengine.dll

4.8.4465.0

19,328

19-Nov-2021

23:42

x86

None

Not applicable

System.web.dll

4.8.4465.0

5,410,192

19-Nov-2021

23:42

x86

None

Not applicable

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

System.web.applicationservices.dll

4.8.4465.0

63,736

19-Nov-2021

23:42

x86

None

Not applicable

System.web.extensions.dll

4.8.4465.0

1,842,456

19-Nov-2021

23:42

x86

None

Not applicable

Aspnet_perf.dll

4.8.4465.0

36,232

19-Nov-2021

23:42

x86

SPN

X86_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

19-Nov-2021

22:11

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

19-Nov-2021

23:44

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_wp.exe

4.8.4465.0

39,832

19-Nov-2021

23:42

x86

SPN

X86_NETFX4-ASP

System.web.extensions.dll

4.8.4465.0

1,842,456

19-Nov-2021

23:42

x86

None

Not applicable

Webengine4.dll

4.8.4465.0

564,616

19-Nov-2021

23:42

x86

None

Not applicable

Webengine.dll

4.8.4465.0

19,328

19-Nov-2021

23:42

x86

None

Not applicable

System.web.dll

4.8.4465.0

5,410,192

19-Nov-2021

23:42

x86

None

Not applicable

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