MS16-021: Security update for NPS RADIUS server to address denial of service: February 9, 2016

Summary
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could cause denial of service on a Network Policy Server (NPS) if an attacker sends specially crafted username strings to the NPS. This scenario could prevent RADIUS authentication on the NPS. 

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-021.
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.

Method 2: Microsoft Download Center

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 MS16-021 that corresponds to the version of Windows that you are running.
More information

Security update deployment information

Security update deployment information

Windows Server 2008 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file namesFor all supported 32-bit editions of Windows Server 2008:
Windows6.0-KB3133043-x86.msu
For all supported x64-based editions of Windows Server 2008:
Windows6.0-KB3133043-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementIn some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, you receive a message that advises you to restart. 

For more information about the reasons why you may be prompted to restart, see Microsoft Knowledge Base Article 887012.
Removal informationWUSA.exe does not support uninstall of updates. To uninstall an update that is installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates, and then select from the list of updates. 
File informationSee the file information section.
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows Server 2008 R2 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file nameFor all supported x64-based editions of Windows Server 2008 R2:
Windows6.1-KB3133043-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementIn some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, you receive a message that advises you to restart. 

For more information about the reasons why you may be prompted to restart, see Microsoft Knowledge Base Article 887012.
Removal informationTo uninstall an update that is installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, and under Windows Update, click View installed updates, and then select from the list of updates. 
File informationSee the file information section.
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows Server 2012 and Windows Server 2012 R2 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file nameFor all supported editions of Windows Server 2012:
Windows8-RT-KB3133043-x64.msu
For all supported editions of Windows Server 2012 R2:
Windows8.1-KB3133043-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementIn some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, you receive a message that advises you to restart. For more information about the reasons why you may be prompted to restart, see Microsoft Knowledge Base Article 887012.
Removal informationTo uninstall an update that is installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, and under Windows Update, click View installed updates, and then select from the list of updates. 
File informationSee the file information section.
Registry key verificationNote A registry key does not exist to validate the presence of this update.

How to obtain help and support for this security 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 hash information

File nameSHA1 hashSHA256 hash
Windows8-RT-KB3133043-x64.msu8D265B3FA94C47D4F031BF4139208B20FAFE38714117A699450F26035D3C4292159FBB4E85176F4CB833F6D2A65B08EC3C37092D
Windows8.1-KB3133043-x64.msu4D4F74206EDCC073BC1C3523F5B642D7B55C261527B8B9F8385E976C01FB0C8941F5C363DDBD6A1AF7B4AF561A0F24609E87B908
Windows6.1-KB3133043-x64.msu43094309E6085F94D44A31F94C6ECBF473F6AD12AEFCDCF7D8A8D9759BBC1FE4AC0493760F5410AF912D4022BC2816653AEF32AB
Windows6.0-KB3133043-x86.msuEC383824516669B8D277521499FB54751058360842EB830CF30A0C773E97143B9A79B70C25284DD2B72899429D70FB261E7C9B7E
Windows6.0-KB3133043-x64.msu5B5483F7A60B9B2E3B8FF0AA5AD440E0D68B3EB3750DA59CE2774AFB245D6494C499BDB3E4F017EA3F79E90B71A3614A49287ACD

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 Server 2012 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
    6.2.920 0.17xxxWindows Server 2012RTMGDR
    6.2.920 0.21xxxWindows Server 2012RTMLDR
  • 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 nameFile versionFile sizeDateTimePlatform
Iassam.dll6.2.9200.17623276,48010-Jan-201615:40x64
Iassam.dll6.2.9200.21743276,48010-Jan-201602:24x64
Iassam.dll6.2.9200.17623219,13610-Jan-201612:04x86
Iassam.dll6.2.9200.21743219,13610-Jan-201600:13x86

Windows Server 2008 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
    6.1.760 1.18xxxWindows 7 or Windows Server 2008 R2 SP1GDR
    6.1.760 1.23 xxxWindows 7 or Windows Server 2008 R2 SP1 LDR
  • 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 nameFile versionFile sizeDateTimePlatform
Iassam.dll6.1.7601.19114254,46408-Jan-201618:56x64
Iassam.dll6.1.7601.23318254,46408-Jan-201619:07x64
Iassam.dll6.1.7601.19114192,51208-Jan-201618:37x86
Iassam.dll6.1.7601.23318192,51208-Jan-201618:46x86

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:
    VersionProductMilestoneService branch
    6.3.960 0.17 xxxWindows Server 2012 R2RTMGDR
  • 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 nameFile versionFile sizeDateTimePlatform
Iassam.dll6.3.9600.18191276,48008-Jan-201617:58x64
Iassam.dll6.3.9600.18191223,23208-Jan-201617:22x86

Windows Server 2008 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
    6.0.600 2.19xxxWindows Server 2008SP2GDR
    6.0.600 2.23xxxWindows Server 2008SP2LDR
  • 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 x86-based versions
File nameFile versionFile sizeDateTimePlatform
Iassam.dll6.0.6002.19578182,78409-Jan-201617:06x86
Iassam.dll6.0.6002.23888182,78409-Jan-201616:33x86
For all supported x64-based versions
File nameFile versionFile sizeDateTimePlatform
Iassam.dll6.0.6002.19578242,68809-Jan-201616:42x64
Iassam.dll6.0.6002.23888242,68809-Jan-201616:40x64
Iassam.dll6.0.6002.19578182,78409-Jan-201617:06x86
Iassam.dll6.0.6002.23888182,78409-Jan-201616:33x86
malicious attacker exploit
Properties

Article ID: 3133043 - Last Review: 02/09/2016 18:02:00 - Revision: 1.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 Service Pack 2

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