MS16-061: Description of the security update for RPC: May 10, 2016

Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if an authenticated attacker makes malformed Remote Procedure Call (RPC) requests to an affected host.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-061.

More Information

Important

• All future security and non-security updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or 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.

Note For Windows RT 8.1, this update is available through Windows Update only.

__

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 MS16-061 that corresponds to the version of Windows that you are running.

More Information

__

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 name	SHA1 hash	SHA256 hash
Windows8.1-KB3153704-x86.msu	29355F6F203FB9E9F75A9B9F4B52863D62B3DF28	48BC70D02C469DC090524FAA1D038C8B6F6E4C1F5F9CFD5B98872578DEF91854
Windows8.1-KB3153704-arm.msu	C970FE8BF58EA0858779A3B206AC3362CAEC5E9C	FC76E3810243742FEB585ED4F17AB6F076205CEF519A2C388E7A3D386B2BB8C2
Windows8.1-KB3153704-x64.msu	CF5B22D6BBF07F74FD3D5A83458D3E9B927900C7	E96B2AD35FD0EF26B09991A97633810C665672A15B8019A84A6122F4EAC3D55A
Windows8-RT-KB3153704-x64.msu	7ED1F4E9102E1CE26D52B7FE03E3E74E1F987EC1	04BA7177728BD1E2A6F72F836ABC0396AA7B196524D77765F77EF8FA16A771FE

__

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 8.1, Windows RT 8.1 and Windows Server 2012 R2 file informationNotes

* 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 0.17 xxx	Windows RT 8.1, Windows 8.1, and 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 x86-based versionsFile name| File version| File size| Date| Time| Platform
  —|—|—|—|—|—
  Rpcrt4.dll| 6.3.9600.18292| 851,712| 31-Mar-2016| 05:25| x86
  For all supported ARM-based versionsFile name| File version| File size| Date| Time| Platform
  —|—|—|—|—|—
  Rpcrt4.dll| 6.3.9600.18292| 708,136| 31-Mar-2016| 04:30| Not applicable
  For all supported x64-based versionsFile name| File version| File size| Date| Time| Platform
  —|—|—|—|—|—
  Rpcrt4.dll| 6.3.9600.18292| 1,307,328| 31-Mar-2016| 06:50| x64
  Rpcrt4.dll| 6.3.9600.18292| 747,520| 31-Mar-2016| 03:40| x86
  Windows Server 2012 file informationNotes

• 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 0.17xxx| Windows 8, Windows RT, or Windows Server 2012| RTM| GDR
  6.2.920 0.21xxx| Windows 8, Windows RT, or Windows Server 2012| RTM| 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 versionsFile name| File version| File size| Date| Time| Platform
  —|—|—|—|—|—
  Rpcrt4.dll| 6.2.9200.21826| 1,298,944| 06-Apr-2016| 16:04| x64
  Rpcrt4.dll| 6.2.9200.21826| 695,296| 31-Mar-2016| 16:20| x86