MS16-155: Description of the Security Only Update 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.

Additional information about this security update

For more information about this security update as it relates to Windows 8.1 and Windows Server 2012 R2, see the following article in the Microsoft Knowledge Base:

3205640 MS16-155: Security Update for the .NET Framework: December 13, 2016

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How to obtain and install this update

Method 1: 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-KB3204802-x64.msu	4B55750207DB255011795E08AB9327543C61B186	425427D3DE2D74A590F23F213E7B92724EB35D4ABD5F892E049115465C91F017
Windows8.1-KB3204802-x86.msu	2406312A8E1C67D0CA172D7A6EF28B52415A30B8	8306A1A7E3D6F74582A97C3FC5DA704909C82BEADD1E64C23E3D47C7975D90D3

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
msvcp120_clr0400.dll	12.0.52512.0	484,552	10-Aug-2016	05:03
msvcr120_clr0400.dll	12.0.52512.0	987,848	10-Aug-2016	05:03
system.data.dll	4.6.1636.0	3,389,616	30-Nov-2016	06:49

For all supported x64-based versions of systems

File name	File version	File size	Date	Time
msvcp120_clr0400.dll	12.0.52512.0	690,016	10-Aug-2016	05:03
msvcr120_clr0400.dll	12.0.52512.0	993,632	10-Aug-2016	05:03
system.data.dll	4.6.1636.0	3,454,640	30-Nov-2016	06:43
msvcp120_clr0400.dll	12.0.52512.0	484,552	10-Aug-2016	05:03
msvcr120_clr0400.dll	12.0.52512.0	987,848	10-Aug-2016	05:03
system.data.dll	4.6.1636.0	3,389,616	30-Nov-2016	06:49

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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