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Summary

This security update resolves a vulnerability in Microsoft .NET Framework. The vulnerability could cause information disclosure if an attacker injects unencrypted data in the target secure channel and then performs a man-in-the-middle (MiTM) attack between the targeted client and a legitimate server. To learn more about these vulnerabilities, see Microsoft Security Bulletin MS16-065 and the following article in the Microsoft Knowledge Base:

3155464 MS16-065: Description of the TLS/SSL protocol information disclosure vulnerability (CVE-2016-0149): May 10, 2016

To install this update, you must have Windows Installer 3.1 or a later version installed on the computer.

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 the "Turn on automatic updating in the Control Panel" section of this Safety & Security Center article.

Method 2: Microsoft Download Center

You can obtain the stand-alone update package through the Microsoft Download Center. To install this update, follow the install instructions on the download page.

Download Download security update 3142037

Update deployment information

For deployment information about this update, see Microsoft Knowledge Base Article 3156757.

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 hash

Package Name

Package Hash SHA 1

Package Hash SHA 2

NDP46-KB3142037-x64.exe

67F2F8B134085F9B99F97B7021AC317B4F58A6E7

CF1002E3D1E5ADA4ED76813AF8FD91B326734A9006D978BBEDDBD53B2497797A

NDP46-KB3142037-x86.exe

775A743FF646021917D483F6CCD61CCB7FA950CE

1FF3D89184630813A4EEC4DFBABEAF1C614DE6ABF40112BE28A74DE2C133D1BA

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

File name

File version

File size

Date

Time

Platform

System.dll

4.6.1075.0

3,460,736

26-Feb-2016

02:21

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

System.dll

4.6.1075.0

3,460,736

26-Feb-2016

02:21

x64

System.dll

4.6.1075.0

3,460,736

26-Feb-2016

02:21

x64


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 4.6.1 when used with:

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

  • Microsoft .NET Framework 4.6 when used with:

    • 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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