View products that this article applies to.

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.

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

More information about this security update

Download information

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

Prerequisites

To apply this security update, you must have the Microsoft security advisory Update for disabling RC4 installed.

Command-line switches for this update

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

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.

Update replacement information

This update does not replace any previously released update.

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.

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 systemsGDR service branch

File name

File version

File size

Date

Time

system.resources.dll

2.0.50727.4927

237,568

06-Dec-2013

23:27

system.resources.dll

2.0.50727.4927

200,704

06-Jul-2012

20:09

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

20:09

system.resources.dll

2.0.50727.6400

212,992

06-Dec-2013

23:28

system.resources.dll

2.0.50727.4927

290,816

06-Jul-2012

20:09

system.resources.dll

2.0.50727.6400

208,896

06-Dec-2013

23:27

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

20:09

system.resources.dll

2.0.50727.6400

212,992

06-Dec-2013

23:27

system.resources.dll

2.0.50727.4927

217,088

06-Jul-2012

20:07

system.resources.dll

2.0.50727.4927

212,992

06-Jul-2012

20:08

system.resources.dll

2.0.50727.6400

204,800

13-Sep-2012

22:03

system.resources.dll

2.0.50727.6400

233,472

06-Dec-2013

23:28

system.resources.dll

2.0.50727.6400

217,088

13-Sep-2012

22:03

system.resources.dll

2.0.50727.4927

192,512

06-Jul-2012

20:08

system.resources.dll

2.0.50727.6400

208,896

13-Sep-2012

22:03

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

19:37

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

19:37

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

19:37

system.resources.dll

2.0.50727.4927

262,144

06-Jul-2012

19:37

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

19:48

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

19:47

system.resources.dll

2.0.50727.6400

184,320

13-Sep-2012

22:03

system.resources.dll

2.0.50727.6400

184,320

13-Sep-2012

22:03

system.dll

2.0.50727.6417

3,198,976

06-Mar-2014

23:13

LDR service branch

File name

File version

File size

Date

Time

system.resources.dll

2.0.50727.4927

237,568

06-Jul-2012

20:00

system.resources.dll

2.0.50727.4927

200,704

06-Jul-2012

19:59

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

19:59

system.resources.dll

2.0.50727.6400

212,992

09-Oct-2012

02:40

system.resources.dll

2.0.50727.4927

290,816

06-Jul-2012

19:58

system.resources.dll

2.0.50727.6400

208,896

09-Oct-2012

02:40

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

19:59

system.resources.dll

2.0.50727.6400

212,992

09-Oct-2012

02:40

system.resources.dll

2.0.50727.4927

217,088

06-Jul-2012

19:57

system.resources.dll

2.0.50727.4927

212,992

06-Jul-2012

19:59

system.resources.dll

2.0.50727.6400

204,800

13-Sep-2012

22:04

system.resources.dll

2.0.50727.6400

233,472

09-Oct-2012

02:40

system.resources.dll

2.0.50727.6400

217,088

13-Sep-2012

22:04

system.resources.dll

2.0.50727.4927

192,512

06-Jul-2012

19:59

system.resources.dll

2.0.50727.6400

208,896

13-Sep-2012

22:04

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

20:02

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

20:01

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

20:03

system.resources.dll

2.0.50727.4927

262,144

06-Jul-2012

20:02

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

20:06

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

20:05

system.resources.dll

2.0.50727.6400

184,320

13-Sep-2012

22:04

system.resources.dll

2.0.50727.6400

184,320

13-Sep-2012

22:04

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

23:12

For all supported x64-based versions of systemsGDR service branch

File name

File version

File size

Date

Time

system.dll

2.0.50727.6417

3,198,976

06-Mar-2014

23:13

system.resources.dll

2.0.50727.4927

237,568

06-Jul-2012

20:22

system.resources.dll

2.0.50727.4927

200,704

06-Jul-2012

19:45

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

19:44

system.resources.dll

2.0.50727.6400

212,992

28-Sep-2012

21:41

system.resources.dll

2.0.50727.4927

290,816

06-Jul-2012

19:42

system.resources.dll

2.0.50727.6400

208,896

28-Sep-2012

21:41

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

19:44

system.resources.dll

2.0.50727.6400

212,992

28-Sep-2012

21:41

system.resources.dll

2.0.50727.4927

217,088

06-Jul-2012

19:41

system.resources.dll

2.0.50727.4927

212,992

06-Jul-2012

19:46

system.resources.dll

2.0.50727.6400

204,800

13-Sep-2012

22:04

system.resources.dll

2.0.50727.6400

233,472

28-Sep-2012

21:41

system.resources.dll

2.0.50727.6400

217,088

13-Sep-2012

22:04

system.resources.dll

2.0.50727.4927

192,512

06-Jul-2012

19:46

system.resources.dll

2.0.50727.6400

208,896

13-Sep-2012

22:03

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

19:47

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

19:46

system.resources.dll

2.0.50727.4927

204,800

06-Jul-2012

19:47

system.resources.dll

2.0.50727.4927

262,144

06-Jul-2012

19:46

system.resources.dll

2.0.50727.4927

196,608

07-Oct-2013

22:56

system.resources.dll

2.0.50727.4927

196,608

07-Oct-2013

22:56

system.resources.dll

2.0.50727.6400

184,320

07-Oct-2013

22:56

system.resources.dll

2.0.50727.6400

184,320

07-Oct-2013

22:56

system.dll

2.0.50727.6417

3,198,976

06-Mar-2014

23:13

LDR service branch

File name

File version

File size

Date

Time

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

23:12

system.resources.dll

2.0.50727.4927

237,568

22-Jul-2013

22:16

system.resources.dll

2.0.50727.4927

200,704

06-Jul-2012

20:04

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

20:04

system.resources.dll

2.0.50727.6400

212,992

22-Jul-2013

22:20

system.resources.dll

2.0.50727.4927

290,816

06-Jul-2012

20:03

system.resources.dll

2.0.50727.6400

208,896

22-Jul-2013

22:17

system.resources.dll

2.0.50727.4927

196,608

06-Jul-2012

20:04

system.resources.dll

2.0.50727.6400

212,992

22-Jul-2013

22:17

system.resources.dll

2.0.50727.4927

217,088

06-Jul-2012

20:04

system.resources.dll

2.0.50727.4927

212,992

06-Jul-2012

20:07

system.resources.dll

2.0.50727.6400

204,800

13-Sep-2012

22:04

system.resources.dll

2.0.50727.6400

233,472

22-Jul-2013

22:16

system.resources.dll

2.0.50727.6400

217,088

13-Sep-2012

22:04

system.resources.dll

2.0.50727.4927

192,512

06-Jul-2012

20:07

system.resources.dll

2.0.50727.6400

208,896

04-Oct-2012

20:58

system.resources.dll

2.0.50727.4927

204,800

04-Oct-2012

20:58

system.resources.dll

2.0.50727.4927

204,800

04-Oct-2012

20:58

system.resources.dll

2.0.50727.4927

204,800

04-Oct-2012

20:58

system.resources.dll

2.0.50727.4927

262,144

04-Oct-2012

20:58

system.resources.dll

2.0.50727.4927

196,608

08-Jan-2014

21:49

system.resources.dll

2.0.50727.4927

196,608

08-Jan-2014

21:49

system.resources.dll

2.0.50727.6400

184,320

08-Jan-2014

21:49

system.resources.dll

2.0.50727.6400

184,320

08-Jan-2014

21:50

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

23:12



Applies toThis article applies to the following:

  • Microsoft .NET Framework 3.5 when used with:

    • Windows 8

    • Windows Server 2012

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