Summary

This security update resolves a vulnerability in Active Directory Federation Services (AD FS). The vulnerability could allow denial of service if an attacker sends certain input data during forms-based authentication to an AD FS server. This scenario causes the server to become unresponsive. 

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-020.

More Information

Important

  • All future security and nonsecurity updates for Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows Server 2012 R2-based computer so that you receive future updates.

  • 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.

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 turn on automatic updating, see
Get security updates automatically.

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS16-020 that corresponds to the version of Windows that you are running.

More Information

Windows Server 2012 R2 (all editions)Reference table

The following table contains the security update information for this software.


Security update file name

For all supported editions of Windows Server 2012 R2:
Windows8.1-KB3134222x64.msu

Installation switches

See Microsoft Knowledge Base article 934307

Restart requirement

In some cases, this update does not require a system restart. If the required files are being used, this update will require a system restart. If this behavior occurs, you receive a message that advises you to restart your system.

Removal information

To uninstall an update installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click Windows Update, and under See also, click Installed updates, and then select from the list of updates.

File information

See the File information section.

Registry key verification

Note There is no registry key to validate the presence of this update.


Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support



File Information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB3134222-x64.msu

FBDDACC3ED1B90CB3032A86A0A0C677B0CBCAC06

8216F3FC687488470E772D57557D3DA5C692ECF66A54D31537A881E33C2BFC6C


The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows Server 2012 R2 file information

Notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table. 

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.17xxx

    Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Microsoft.identityserver.diagnostics.dll

6.3.9600.18192

151,552

13-Jan-2016

15:41

x86

Microsoft.identityserver.proxyservice.exe

6.3.9600.18192

73,216

13-Jan-2016

15:41

x86

Microsoft.identityserver.proxyservice.exe.config

Not applicable

1,067

15-Mar-2014

00:10

Not applicable

Microsoft.identityserver.service.dll

6.3.9600.18192

696,832

13-Jan-2016

15:41

x86

Microsoft.identityserver.webhost.dll

6.3.9600.18192

175,104

13-Jan-2016

15:41

x86

Microsoft.identityserver.web.dll

6.3.9600.18192

816,640

13-Jan-2016

15:41

x86

Microsoft.identityserver.dll

6.3.9600.18192

655,872

13-Jan-2016

15:41

x86


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