View products that this article applies to.

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.

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 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.

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

On your WSUS server, follow these steps:

  1. Click Start, click Administrative Tools, and then click Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then click Action.

  3. Click Import Updates.

  4. WSUS will open a browser window in which you may be prompted to install an ActiveX control. You will need to install the ActiveX control to continue.

  5. Once the ActiveX control is installed, you will see the Microsoft Update Catalog screen. Type 3205378 in the Search box, and then click Search.

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Click Add to add them to your basket.

  7. When you have selected all the packages you need, click View Basket.

  8. Click Import to import the packages to your WSUS server.

  9. Click Close once the packages have been imported to return to WSUS.


The updates are now available for installation through WSUS.

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

Update removal informationNote 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 informationThis 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 informationThis update does not replace any previously released update.

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


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


Applies toThis article applies to the following:

  • Microsoft .NET Framework 4.6.2 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Any additional feedback? (Optional)

Thank you for your feedback!

×