MS16-155: Description of the Security and Quality Rollup for the .NET Framework 4.6.2 for Windows 8.1 and Windows Server 2012 R2: December 13, 2016

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Summary

This update resolves vulnerabilities in the Microsoft .NET Framework. A security vulnerability exists in the .NET Framework that could allow an attacker to access information at rest that should be defended by cryptographic mechanisms. This update fixes the way that the Framework handles the key and therefore defends the data. To learn more about this vulnerability, see Microsoft Security Bulletin MS16-155.

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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.

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How to obtain and install this 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 the Microsoft Update Catalog website.

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Update deployment information

For deployment information about this update, see Microsoft Knowledge Base Article 3205640 .

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 does not replace any previously released update.

File information

File hash

Windows8.1-KB3205378-arm.msu	BD7F40CCED1A0DE8A29BF689F4CF69D017D86E41	0E92BB0C323EC7BB613ACA7241814B3C31597D18B460817A2BBACF78CE4B2F53
Windows8.1-KB3205378-x64.msu	30390C422203C74BDB41CC16FA796F2B643AE1F1	7847B2BC25F6127EEE64B7E588EE68715D9C37411F2C5AA5F5146B6C98752E7C
Windows8.1-KB3205378-x86.msu	5480B94DA2521D3B8E88B23B47992B03138FDAB1	2086EF75D54CA5C04903D7D46B91B47B8D555FA22CC21CD10ECDC4DEEC38E270

File attributes

The English (United States) version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the 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 the times may change when you perform certain operations on the files.

For all supported x86-based versions of systems

File name	File version	File size	Date	Time
msvcr120_clr0400.dll	12.0.52512.0	987,848	10-Aug-2016	05:03

For all supported x64-based versions of systems

File name	File version	File size	Date	Time
system.data.dll	4.6.1636.0	3,389,616	30-Nov-2016	06:49

For all supported ARM-based versions of systems

File name	File version	File size	Date	Time
msvcr120_clr0400.dll	12.0.52242.36242	634,336	10-Aug-2016	05:03

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

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