Security Only Update for .NET Framework 2.0, 3.0 for Windows Server 2008 SP2 (KB4569735)

Applies to:

Microsoft .NET Framework 2.0 Microsoft .NET Framework 3.0

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

IMPORTANT WSUS scan cab files will continue to be available for Windows Server 2008 SP2. If you have a subset of devices running this operating system 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 this OS 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.

Summary

Security improvements

An elevation of privilege vulnerability exists when ASP.NET or .NET Framework web applications running on IIS improperly allow access to cached files. An attacker who successfully exploited this vulnerability could gain access to restricted files. To exploit this vulnerability, an attacker would need to send a specially crafted request to an affected server. The update addresses the vulnerability by changing how ASP.NET and .NET Framework handle requests.

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

A remote code execution vulnerability exists when Microsoft .NET Framework processes input. An attacker who successfully exploited this vulnerability could take control of an affected system. To exploit the vulnerability, an attacker would need to be able to upload a specially crafted file to a web application. The security update addresses the vulnerability by correcting how .NET Framework processes input.

For more information go to: https://go.microsoft.com/fwlink/?linkid=2138023

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.

  • 4570503 Description of the Security Only Update for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 SP2 (KB4570503)

How to obtain and install the update

Before installing this update

Prerequisite:

To apply this update, you must have .NET Framework 2.0, 3.0 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 April 9, 2019 servicing stack update (SSU) (KB4493730). To get the standalone package for this SSU, search for it in theMicrosoft Update Catalog.This update is required to install updates that are only SHA-2 signed.

  2. The latest SHA-2 update (KB4474419) released October 8, 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 (KB4538484) 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 theMicrosoft Update Catalog.

Install this update

Release Channel

Available

Next Step

Microsoft Update Catalog

Yes

To get the standalone package for this update, go to theMicrosoft Update Catalogwebsite.

Windows Server Update Services (WSUS)

Yes

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

Product:Windows Server 2008 Service Pack 2

Classification: Security Updates

Prerequisites

To apply this update, you must have .NET Framework 2.0, 3.0 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:

20200811 Security update deployment information: August 11, 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.


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 Vista and Windows Server 2008 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

Windows6.0-KB4569735-x64.msu

23D266B6D84536F63CAB6BA671DA4A39DE7B76FC

4D0B9A31BCB5734A7D9D922FE500C89B8E344DBF034D2296C2543884352FEDBA

Windows6.0-KB4569735-x86.msu

040F49C4A02C15EFD1D771E8CB59D7C749843F7D

860F534625D434E99987341450F3EBBB63BC57FCC019EC17EE40A0D8790ADBE8

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Aspnet_wp.exe

2.0.50727.8951

45,456

01-Jul-2020

13:06

x64

SPN

AMD64_NETFX-ASP

System.web.regularexpressions.dll

2.0.50727.8951

98,304

01-Jul-2020

13:06

x86

None

Not applicable

Webengine.dll

2.0.50727.8951

748,936

01-Jul-2020

13:06

x64

None

Not applicable

System.web.dll

2.0.50727.8951

5,300,224

01-Jul-2020

13:06

x64

None

Not applicable

System.web.regularexpressions.dll

2.0.50727.8951

98,304

01-Jul-2020

13:06

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

684,032

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

606,208

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

593,920

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

622,592

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

815,104

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

614,400

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

585,728

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

622,592

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

647,168

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

630,784

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

610,304

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

671,744

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

622,592

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

577,536

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

626,688

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

606,208

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

602,112

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

610,304

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

753,664

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

589,824

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

598,016

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

552,960

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

557,056

16-Nov-2017

03:48

x86

None

Not applicable

Aspnet_wp.exe

2.0.50727.8951

33,680

01-Jul-2020

13:06

x86

SPN

X86_NETFX-ASP

Webengine.dll

2.0.50727.8951

439,680

01-Jul-2020

13:06

x86

None

Not applicable

System.web.dll

2.0.50727.8951

5,292,032

01-Jul-2020

13:06

x86

None

Not applicable

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

System.web.regularexpressions.dll

2.0.50727.8951

98,304

01-Jul-2020

13:06

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

684,032

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

606,208

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

593,920

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

622,592

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

815,104

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

614,400

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

585,728

16-Nov-2017

03:47

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

622,592

16-Nov-2017

03:48

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

647,168

18-Oct-2018

23:19

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

630,784

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

610,304

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

671,744

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

622,592

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

577,536

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

626,688

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

606,208

18-Oct-2018

23:20

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

602,112

04-Mar-2020

21:07

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

610,304

04-Mar-2020

21:07

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

753,664

04-Mar-2020

21:08

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

589,824

04-Mar-2020

21:08

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

598,016

04-Mar-2020

21:09

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

552,960

04-Mar-2020

21:09

x86

None

Not applicable

System.web.resources.dll

2.0.50727.4016

557,056

16-Nov-2017

03:48

x86

None

Not applicable

Aspnet_wp.exe

2.0.50727.8951

33,680

01-Jul-2020

13:06

x86

SPN

X86_NETFX-ASP

Webengine.dll

2.0.50727.8951

439,680

01-Jul-2020

13:06

x86

None

Not applicable

System.web.dll

2.0.50727.8951

5,292,032

01-Jul-2020

13:06

x86

None

Not applicable

Information about protection and security

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.

×