Applies to:

Microsoft .NET Framework 3.5

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 3.5 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-KB5008888-x64.msu

D0C603467FA0D2B60FB1DB06D0B73ECFAE1E45C29F216F5063544418B8851632

Windows8-RT-KB5008888-x86.msu

55DB99A97CBA52FAAD768D395D784DD67FD22A4FE0B8520265605C71DE9D7CD1

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Aspnet_wp.exe

2.0.50727.8955

45,456

07-Dec-2021

02:42

x64

SPN

AMD64_NETFX-ASP

System.web.regularexpressions.dll

2.0.50727.8955

98,304

07-Dec-2021

02:42

x86

None

Not applicable

Webengine.dll

2.0.50727.8955

748,920

07-Dec-2021

02:42

x64

None

Not applicable

System.web.dll

2.0.50727.8955

5,300,224

07-Dec-2021

02:42

x64

None

Not applicable

System.web.regularexpressions.dll

2.0.50727.8955

98,304

07-Dec-2021

02:43

x86

None

Not applicable

Aspnet_wp.exe

2.0.50727.8955

33,680

07-Dec-2021

02:43

x86

SPN

X86_NETFX-ASP

Webengine.dll

2.0.50727.8955

439,696

07-Dec-2021

02:43

x86

None

Not applicable

System.web.dll

2.0.50727.8955

5,292,032

07-Dec-2021

02:43

x86

None

Not applicable

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

System.web.regularexpressions.dll

2.0.50727.8955

98,304

07-Dec-2021

02:43

x86

None

Not applicable

Aspnet_wp.exe

2.0.50727.8955

33,680

07-Dec-2021

02:43

x86

SPN

X86_NETFX-ASP

Webengine.dll

2.0.50727.8955

439,696

07-Dec-2021

02:43

x86

None

Not applicable

System.web.dll

2.0.50727.8955

5,292,032

07-Dec-2021

02:43

x86

None

Not applicable

Information about protection and security

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