Notice

This update is included in the February 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 and 4.7.1 for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 (KB 4074807). Part of this update is included in the Security and Quality rollup (KB 4076494) on February 13, 2018, in the Preview of Quality rollup (KB 4057272) on January 17, 2018, and as part of the Security and Quality rollup (KB 4055266) on January 9, 2018.

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

  • All updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require that update KB 2919355 is installed. We recommend that you install update KB 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future.

  • 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 section 4.2.1.12 of RFC 5280. 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 fails.

    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 8.1, Windows RT 8.1, and Windows Server 2012 R2, see the following articles in the Microsoft Knowledge Base:

4074807 February 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows 8.1, RT 8.1, and Server 2012 R2 (KB 4074807)

4076494 Security and Quality Rollup for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows 8.1, RT 8.1, and Server 2012 R2 (KB 4076494)

4057272 January 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows 8.1, RT 8.1, and Server 2012 R2 (KB 4057272)

4055266 Security and Quality Rollup for  .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 updates for Windows 8.1, RT 8.1, and Server 2012 R2 (KB 4055266)

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to update KB 4074807.

Method 3: 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. After the control is installed, you will see the Microsoft Update Catalog screen. Enter 4074807 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 that you need, select View Basket.

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

  9. Select Close after 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 4049017, KB 4041085, KB4042078 and KB 4057272.

 

File information

File hash

Package name

PackageHashSHA1

PackageHashSHA2

Windows8.1-KB4054999-x64.msu

F556F8B785508499CC63E684FE51A6764F8E3993

966455E23FE88263C27740301A9343E999D64CB4438DBC55432E57EA7EA69574

Windows8.1-KB4054999-x86.msu

AB1D1A2831CDD588DE1551786C1372025E2997E8

F44026D0544A4BE3170A0B8CD3EE8639BC5BF4BF731B41C1E71F6E7230DBEA28


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.resources.dll

3.0.4506.7903

5,120

15-Oct-2015

13:35

smsvchost.resources.dll

3.0.4506.7903

17,576

15-Oct-2015

13:35

system.servicemodel.resources.dll

3.0.4506.7903

471,040

15-Aug-2015

02:21

system.xml.resources.dll

2.0.50727.7905

163,840

15-Aug-2015

02:24

big5.nlp

66,728

23-Sep-2015

13:34

bopomofo.nlp

82,172

23-Sep-2015

13:34

ksc.nlp

116,756

23-Sep-2015

13:34

normidna.nlp

59,342

23-Sep-2015

13:34

normnfc.nlp

45,794

23-Sep-2015

13:34

normnfd.nlp

39,284

23-Sep-2015

13:34

normnfkc.nlp

66,384

23-Sep-2015

13:34

normnfkd.nlp

60,294

23-Sep-2015

13:34

prc.nlp

83,748

23-Sep-2015

13:34

prcp.nlp

83,748

23-Sep-2015

13:34

sortkey.nlp

262,148

23-Sep-2015

13:34

sorttbls.nlp

20,320

23-Sep-2015

13:34

xjis.nlp

28,288

23-Sep-2015

13:34

presentationfontcache.exe.config

161

20-Aug-2015

13:24

For all x64-based systems

File name

File version

File size

Date

Time

big5.nlp

66,728

22-Apr-2017

13:08

bopomofo.nlp

82,172

22-Apr-2017

13:08

ksc.nlp

116,756

22-Apr-2017

13:08

normidna.nlp

59,342

22-Apr-2017

13:08

normnfc.nlp

45,794

22-Apr-2017

13:08

normnfd.nlp

39,284

22-Apr-2017

13:08

normnfkc.nlp

66,384

22-Apr-2017

13:08

normnfkd.nlp

60,294

22-Apr-2017

13:08

prc.nlp

83,748

22-Apr-2017

13:08

prcp.nlp

83,748

22-Apr-2017

13:08

sortkey.nlp

262,148

22-Apr-2017

13:08

sorttbls.nlp

20,320

22-Apr-2017

13:08

xjis.nlp

28,288

22-Apr-2017

13:08

presentationfontcache.exe.config

161

22-Aug-2015

13:27

smdiagnostics.resources.dll

3.0.4506.7903

5,120

22-Sep-2015

13:09

smsvchost.resources.dll

3.0.4506.7903

17,064

21-Oct-2015

13:32

smsvchost.resources.dll

3.0.4506.7903

17,576

21-Oct-2015

13:30

system.servicemodel.resources.dll

3.0.4506.7903

466,944

22-Sep-2015

13:09

system.xml.resources.dll

2.0.50727.7905

163,840

22-Sep-2015

13:09

big5.nlp

66,728

23-Sep-2015

13:34

bopomofo.nlp

82,172

23-Sep-2015

13:34

ksc.nlp

116,756

23-Sep-2015

13:34

normidna.nlp

59,342

23-Sep-2015

13:34

normnfc.nlp

45,794

23-Sep-2015

13:34

normnfd.nlp

39,284

23-Sep-2015

13:34

normnfkc.nlp

66,384

23-Sep-2015

13:34

normnfkd.nlp

60,294

23-Sep-2015

13:34

prc.nlp

83,748

23-Sep-2015

13:34

prcp.nlp

83,748

23-Sep-2015

13:34

sortkey.nlp

262,148

23-Sep-2015

13:34

sorttbls.nlp

20,320

23-Sep-2015

13:34

xjis.nlp

28,288

23-Sep-2015

13:34

presentationfontcache.exe.config

161

20-Aug-2015

13:24

How to obtain help and support for this security update

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