Description of the Security Only update for .NET Framework 3.5.1 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB 4054176)

View products that this article applies to.

Summary

This security update resolves a security feature bypass vulnerability that exists when Microsoft .NET Framework and .NET Core components do not completely validate certificates. This security update addresses the vulnerability by helping to make sure that .NET Framework and .NET Core components completely validate certificates. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-0786.

Additionally, this security update resolves a Denial of Service vulnerability that exists when .NET Framework and .NET core components improperly process XML documents. This update addresses the vulnerability by correcting how .NET Framework and .NET Core component applications handle XML document processing. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-0764.

Important

  • 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

  • Enhanced Key Usage (EKU) is described in RFC 5280 in section 4.2.1.12. This extension indicates one or more purposes for which the certified public key may be used, in addition to or instead of the basic purposes that are indicated in the key usage extension. For example, a certificate that is used for the authentication of a client to a server must be configured for Client Authentication. Similarly, a certificate that is used for the authentication of a server must be configured for Server Authentication. With this change, besides requiring the appropriate client/server EKU on certificates, if the root certificate is disabled, the certificate chain validation will fail.

    When certificates are used for authentication, the authenticator examines the certificate that is provided by the remote endpoint and seeks the correct purpose object identifier in Application Policies extensions. When a certificate is used for client authentication, the object identifier for Client Authentication must be present in the EKU extensions of the certificate, or authentication fails. The object identifier for Client Authentication is 1.3.6.1.5.5.7.3.2. Likewise, when a certificate is used for server authentication, the object identifier for Server Authentication must be present in the EKU extensions of the certificate, or authentication fails. The object identifier for Server Authentication is 1.3.6.1.5.5.7.3.1. Certificates that have no EKU extension continue to authenticate correctly.

    First, consider making changes to your component’s certificates to make sure that they are using the correct EKU OID attributes and are secured correctly. If you temporarily cannot access correctly reissued certificates, you can choose to opt in or out of the security change to avoid any connectivity effects. To do this, specify the following appsetting in the configuration file:

    <appSettings>
        <add key="wcf:useLegacyCertificateUsagePolicy" value="true" />
    </appSettings>

    Note Setting the value to “true” will opt out of the security changes.

  • For more information about this security update as it relates to Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1, see the following article in the Microsoft Knowledge Base:

4055269 Security Only update for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 updates for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB 4055269)

How to obtain and install the update

Method 1: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog.

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 will open a browser window in which you may be prompted to install an ActiveX control. Install the ActiveX control to continue.

  5. Once the control is installed, you will see the Microsoft Update Catalog screen. Enter 4055269 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. When you have selected all the packages you need, select View Basket.

  8. Select Import to import the packages to your WSUS server.

  9. Click Close once the packages have been imported 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:

20180109 Security update deployment information: January 9, 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 updates KB 3122648 and KB 2973112.

 

File information

File hash

Package name

PackageHashSHA1

PackageHashSHA2

Windows6.1-KB4054176-ia64.msu

621D331BAB717F6E4C29190CAED47734A95E696E

F4FBE62C0D0CA6676167274108CB0A634CCDAFE261057C39A0BAB17960609F6C

Windows6.1-KB4054176-x86.msu

10383B165D3126026B6E642BC45C5FB2E74BF58B

392E3DB13DC85491CA42A896092EC7A5641B15BBA951877B4081FFA196ACB2A7

Windows6.1-KB4054176-x64.msu

C7C6C0CFDE80925E0278BDAEF17663D7CDAE3269

3BF194121E972E8C5DC28CC0C2DD5E8486585148F374F528F25B775B1A0083F0


File attributes

The English (United States) version of this hotfix 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.

For all x86-based systems

File name

File version

File size

Date

Time

smdiagnostics.dll

3.0.4506.8789

110,592

28-Nov-2017

14:04

smsvchost.exe

3.0.4506.8789

129,664

28-Nov-2017

14:04

system.data.sqlxml.dll

2.0.50727.8773

745,472

28-Nov-2017

14:04

system.identitymodel.dll

3.0.4506.8789

446,464

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

system.servicemodel.washosting.dll

3.0.4506.8789

32,768

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

system.xml.dll

2.0.50727.8773

2,056,192

28-Nov-2017

14:04

servicemodel.mof

85,113

23-Mar-2016

22:38

servicemodel.mof.uninstall

896

23-Mar-2016

22:38

servicemonikersupport.dll

3.0.4506.8789

18,096

28-Nov-2017

14:04

system.identitymodel.dll

3.0.4506.8789

446,464

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

For all x64-based systems

File name

File version

File size

Date

Time

system.data.sqlxml.dll

2.0.50727.8773

745,472

28-Nov-2017

14:05

system.xml.dll

2.0.50727.8773

2,056,192

28-Nov-2017

14:05

servicemodel.mof

85,113

23-Mar-2016

22:39

servicemodel.mof.uninstall

896

23-Mar-2016

22:39

servicemonikersupport.dll

3.0.4506.8789

20,144

28-Nov-2017

14:05

smdiagnostics.dll

3.0.4506.8789

94,208

28-Nov-2017

14:05

smsvchost.exe

3.0.4506.8789

117,376

28-Nov-2017

14:05

system.identitymodel.dll

3.0.4506.8789

405,504

28-Nov-2017

14:05

system.runtime.serialization.dll

3.0.4506.8789

847,872

28-Nov-2017

14:05

system.runtime.serialization.dll

3.0.4506.8789

847,872

28-Nov-2017

14:05

system.servicemodel.dll

3.0.4506.8789

5,332,992

28-Nov-2017

14:05

system.servicemodel.washosting.dll

3.0.4506.8789

32,768

28-Nov-2017

14:05

system.servicemodel.dll

3.0.4506.8789

5,332,992

28-Nov-2017

14:05

smdiagnostics.dll

3.0.4506.8789

110,592

28-Nov-2017

14:04

smsvchost.exe

3.0.4506.8789

129,664

28-Nov-2017

14:04

system.data.sqlxml.dll

2.0.50727.8773

745,472

28-Nov-2017

14:04

system.identitymodel.dll

3.0.4506.8789

446,464

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

system.servicemodel.washosting.dll

3.0.4506.8789

32,768

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

system.xml.dll

2.0.50727.8773

2,056,192

28-Nov-2017

14:04

servicemodel.mof

85,113

23-Mar-2016

22:38

servicemodel.mof.uninstall

896

23-Mar-2016

22:38

servicemonikersupport.dll

3.0.4506.8789

18,096

28-Nov-2017

14:04

system.identitymodel.dll

3.0.4506.8789

446,464

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

For all IA64-based ystems

File name

File version

File size

Date

Time

system.data.sqlxml.dll

2.0.50727.8781

745,472

31-Dec-2017

23:52

system.xml.dll

2.0.50727.8781

2,056,192

31-Dec-2017

23:52

servicemodel.mof

85,113

23-Mar-2016

22:39

servicemodel.mof.uninstall

896

23-Mar-2016

22:39

servicemonikersupport.dll

3.0.4506.8789

34,480

28-Nov-2017

14:05

smdiagnostics.dll

3.0.4506.8789

94,208

28-Nov-2017

14:05

smsvchost.exe

3.0.4506.8789

117,376

28-Nov-2017

14:05

system.identitymodel.dll

3.0.4506.8789

405,504

28-Nov-2017

14:05

system.runtime.serialization.dll

3.0.4506.8789

847,872

28-Nov-2017

14:05

system.runtime.serialization.dll

3.0.4506.8789

847,872

28-Nov-2017

14:05

system.servicemodel.dll

3.0.4506.8789

5,332,992

28-Nov-2017

14:05

system.servicemodel.washosting.dll

3.0.4506.8789

32,768

28-Nov-2017

14:05

system.servicemodel.dll

3.0.4506.8789

5,332,992

28-Nov-2017

14:05

smdiagnostics.dll

3.0.4506.8789

110,592

28-Nov-2017

14:04

smsvchost.exe

3.0.4506.8789

129,664

28-Nov-2017

14:04

system.data.sqlxml.dll

2.0.50727.8781

745,472

31-Dec-2017

23:51

system.identitymodel.dll

3.0.4506.8789

446,464

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

system.servicemodel.washosting.dll

3.0.4506.8789

32,768

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

system.xml.dll

2.0.50727.8781

2,056,192

31-Dec-2017

23:51

servicemodel.mof

85,113

23-Mar-2016

22:38

servicemodel.mof.uninstall

896

23-Mar-2016

22:38

servicemonikersupport.dll

3.0.4506.8789

18,096

28-Nov-2017

14:04

system.identitymodel.dll

3.0.4506.8789

446,464

28-Nov-2017

14:04

system.runtime.serialization.dll

3.0.4506.8789

970,752

28-Nov-2017

14:04

system.servicemodel.dll

3.0.4506.8789

5,992,448

28-Nov-2017

14:04

How to obtain help and support for this security update

Applies to

This article applies to the following:

  • Microsoft .NET Framework 3.5.1 when used with:

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

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.

×