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MS15-133: Description of the security update for Windows PGM: December 8, 2015

Summary
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to a targeted system and runs a specially crafted application that, by way of a race condition, results in references to memory locations that have already been freed. 

To learn more about the vulnerability, see Microsoft Security Bulletin MS15-133.
More information
Important
  • All future security and nonsecurity 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 and 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 MS15-133 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
malicious attacker exploit
File Information

File hash information

File nameSHA1 hashSHA256 hash
Windows8-RT-KB3109103-x64.msu89D61082BFDA039DA1D77D64C4519405925B77F51B212216C638E1DF1539A94FF1F69C7E78B3A8B22B4DA21946EEE8C2987E67E1
Windows8.1-KB3109103-x86.msu7879999F1AD4E307835C800722F5577FBBFF5152330CC8F10E75F922B95186DD5091034C038AACE82F98D1D07A0EB6CF9F56F2F3
Windows8-RT-KB3109103-x86.msuFBA9CE94EEEB92D6A3EB6407D189C97F72A541958A426E9294F41195F0E70641EBB27A34EF07A7035C353F06DC0B5D793E35FED3
Windows6.1-KB3109103-x86.msuC0F1CE4EAFBE4A952A0FF22199F7952FD82B865F39688BDC1FA9C409AE63ECC0F44940386393B1B6BCE59F451A2AE49F1F55D200
Windows6.0-KB3109103-ia64.msuBE1B15BD13658B18B73843672502091608A11B958BCE33E79E14A69764CA824AC8F20CDBEA73EB15B7FA8002A79FC5178B254EB4
Windows6.0-KB3109103-x64.msu92A49AA461DBE398F8EAF1A8DF7572903C59A6F53AB66CC3C2D8BA0B5AFBF5DC3903E2674B5BC91E2118AE5E36E5A5829F705AA1
Windows8.1-KB3109103-x64.msuE72F10A63EBCA35733B131BFB03F8CD07575FA02CFBC0D1FAC53F3BAE75F81FEC38D37EEC3B9BA9CD554EBD52D80F4B8FF2A9EB9
Windows6.1-KB3109103-ia64.msu9AD27971ECC91570812D3E8A8ABEE596979E1AE716EEC59D13AD7F1F684512E76BF895B55665BA1991387295552A79D53BB19647
Windows6.0-KB3109103-x86.msu193C96E23CD6939C822D0F51DDC1B5D3A369821E1A9E735FF072BFECF3BC4CAB05CF2DD2BA5DFCFA61150D6AC501F91109EBBFBF
Windows6.1-KB3109103-x64.msu5A443C08AC3F02AE8A7EC1100F306F8CF0D216DB3CBDE3DF10F70BCBE686F8B3943B4031D4A18D9715C99786DF5C7F746781D8BB

File information

The English (United States) version of this software update 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). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

Windows 8 and 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 8, Windows RT, or Windows Server 2012RTMGDR
    6.2.920 0.21xxxWindows 8, Windows RT, or Windows 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
Rmcast.sys6.2.9200.17565147,96805-Nov-201509:55x64
Wshrm.dll6.2.9200.1638417,40826-Jul-201203:08x64
Rmcast.sys6.2.9200.21683147,96805-Nov-201509:40x64
Wshrm.dll6.2.9200.1638417,40826-Jul-201203:08x64
Wshrm.dll6.2.9200.1638415,36026-Jul-201203:20x86
Wshrm.dll6.2.9200.1638415,36026-Jul-201203:20x86
For all supported x86-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.2.9200.17565123,39205-Nov-201509:57x86
Wshrm.dll6.2.9200.1638415,36026-Jul-201203:20x86
Rmcast.sys6.2.9200.21683123,39205-Nov-201510:11x86
Wshrm.dll6.2.9200.1638415,36026-Jul-201203:20x86

Windows 8.1 and 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 RT 8.1, Windows 8.1, and Windows 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 x86-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.3.9600.18119121,85605-Nov-201508:21x86
Wshrm.dll6.3.9600.1741514,84829-Oct-201401:58x86
For all supported x64-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.3.9600.18119145,40805-Nov-201508:59x64
Wshrm.dll6.3.9600.1741517,92029-Oct-201402:42x64
Wshrm.dll6.3.9600.1741514,84829-Oct-201401:58x86

Windows 7 and 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 x86-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.1.7601.19055117,76005-Nov-201509:48x86
Wshrm.dll6.1.7601.1905514,84805-Nov-201519:02x86
Rmcast.sys6.1.7601.23260117,76005-Nov-201509:43x86
Wshrm.dll6.1.7601.2326014,84805-Nov-201519:06x86
For all supported ia64-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.1.7601.19055371,20005-Nov-201509:17IA-64
Wshrm.dll6.1.7601.1905540,44805-Nov-201519:07IA-64
Rmcast.sys6.1.7601.23260371,20005-Nov-201509:17IA-64
Wshrm.dll6.1.7601.2326040,44805-Nov-201523:22IA-64
Wshrm.dll6.1.7601.1905514,84805-Nov-201519:02x86
Wshrm.dll6.1.7601.2326014,84805-Nov-201519:06x86
For all supported x64-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.1.7601.19055146,94405-Nov-201509:53x64
Wshrm.dll6.1.7601.1905517,40805-Nov-201519:05x64
Rmcast.sys6.1.7601.23260146,94405-Nov-201510:00x64
Wshrm.dll6.1.7601.2326017,40805-Nov-201523:25x64
Wshrm.dll6.1.7601.1905514,84805-Nov-201519:02x86
Wshrm.dll6.1.7601.2326014,84805-Nov-201519:06x86

Windows Vista and 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 Vista or Windows Server 2008SP2GDR
    6.0.600 2.23xxxWindows Vista or Windows 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 ia64-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.0.6002.19534365,56805-Nov-201507:45IA-64
Wshrm.dll6.0.6001.1800040,44819-Jan-200808:29IA-64
Rmcast.sys6.0.6002.23844365,56805-Nov-201507:20IA-64
Wshrm.dll6.0.6002.2384440,44805-Nov-201507:51IA-64
Wshrm.dll6.0.6002.1953414,84805-Nov-201509:07x86
Wshrm.dll6.0.6002.2384414,84805-Nov-201508:20x86
For all supported x64-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.0.6002.19534140,80005-Nov-201507:54x64
Wshrm.dll6.0.6002.1953417,40805-Nov-201508:55x64
Rmcast.sys6.0.6002.23844140,80005-Nov-201507:34x64
Wshrm.dll6.0.6002.2384417,40805-Nov-201508:14x64
Wshrm.dll6.0.6002.1953414,84805-Nov-201509:07x86
Wshrm.dll6.0.6002.2384414,84805-Nov-201508:20x86
For all supported x86-based versions
File nameFile versionFile sizeDateTimePlatform
Rmcast.sys6.0.6002.19534113,66405-Nov-201507:34x86
Wshrm.dll6.0.6000.1638614,84802-Nov-200609:46x86
Rmcast.sys6.0.6002.23844113,66405-Nov-201507:10x86
Wshrm.dll6.0.6002.2384414,84805-Nov-201508:20x86
Properties

Article ID: 3109103 - Last Review: 12/08/2015 18:29:00 - Revision: 1.0

Windows 10, Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows RT 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8, Windows RT, Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1, Windows Server 2008 Service Pack 2, Windows Vista Service Pack 2

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