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Description of the security update for the .NET Framework 4.5 and the .NET Framework 4.5.1 on Windows 7 Service Pack 1 and Windows Server 2008 R2 Service Pack 1: May 13, 2014

Introduction

This update is for the Microsoft .NET Framework to disable RC4 in Transport Layer Security (TLS) through the modification of the system registry. Use of RC4 in TLS could allow an attacker to perform man-in-the-middle attacks and recover plaintext from encrypted sessions.

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Summary

Microsoft has released a security advisory about this issue for IT professionals. The security advisory contains additional security-related information. To view the security advisory, go to the following Microsoft website:

https://technet.microsoft.com/security/advisory/2960358

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More information about this security update

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Download information

This update is available for download from the Microsoft Download Center.

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Prerequisites

To apply this security update, you must have the following items installed on the computer:

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Command-line switches for this update

Learn about the various command-line switches that are supported by this Microsoft .NET Framework update.

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Restart information

This update does not require a system restart after you apply it unless the files that are being updated are locked or being used.

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Update replacement information

This update does not replace any previously released update.

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Update removal information

Note We do not recommend that you remove any security update.

To remove this update, or use the Programs and Features item in Control Panel.

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File information
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
GDR service branch
File nameFile versionFile sizeDateTime
System.dll4.0.30319.341143,471,00007-Mar-201412:24
LDR service branch
File nameFile versionFile sizeDateTime
System.dll4.0.30319.361173,471,00007-Mar-201410:44
For all supported x64-based versions of systems
GDR service branch
File nameFile versionFile sizeDateTime
System.dll4.0.30319.341143,471,00007-Mar-201412:24
LDR service branch
File nameFile versionFile sizeDateTime
System.dll4.0.30319.361173,471,00007-Mar-201410:44

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Applies to

This article applies to the following:
  • Microsoft .NET Framework 4.5 when used with:
    • Windows 7 Service Pack 1
    • Windows Server 2008 R2 Service Pack 1
  • Microsoft .NET Framework 4.5.1 when used with:
    • Windows 7 Service Pack 1
    • Windows Server 2008 R2 Service Pack 1

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Keywords: atdownload, kbbug, kbexpertiseinter, kbfix, kblangall, kbsecbulletin, kbsecreview, kbsecurity, kbsecvulnerability, kb, kbmustloc

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Article Info
Article ID : 2938782
Revision : 1
Created on : 1/7/2017
Published on : 5/13/2014
Exists online : False
Views : 375