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.

Command-line switches for this update

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

Prerequisites

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

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 replaces update 2633873.

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

2.0.50727.5420

241,664

08-Jul-2013

12:30

system.resources.dll

2.0.50727.5420

204,800

08-Jul-2013

12:43

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:31

system.resources.dll

2.0.50727.5420

212,992

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

294,912

08-Jul-2013

12:39

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:39

system.resources.dll

2.0.50727.5420

212,992

08-Jul-2013

12:41

system.resources.dll

2.0.50727.5420

221,184

08-Jul-2013

12:31

system.resources.dll

2.0.50727.5420

217,088

08-Jul-2013

12:43

system.resources.dll

2.0.50727.5420

204,800

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

233,472

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

217,088

08-Jul-2013

12:48

system.resources.dll

2.0.50727.5420

196,608

08-Jul-2013

12:35

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:48

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:39

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:41

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:48

system.resources.dll

2.0.50727.5420

266,240

08-Jul-2013

12:48

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:48

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:40

system.resources.dll

2.0.50727.5420

184,320

08-Jul-2013

12:46

system.resources.dll

2.0.50727.5420

184,320

08-Jul-2013

12:47

system.dll

2.0.50727.5484

3,198,976

06-Mar-2014

22:46

LDR service branch

File name

File version

File size

Date

Time

system.resources.dll

2.0.50727.5420

241,664

09-Jul-2013

06:29

system.resources.dll

2.0.50727.5420

204,800

09-Jul-2013

06:46

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:31

system.resources.dll

2.0.50727.5420

212,992

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

294,912

09-Jul-2013

06:29

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:35

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:36

system.resources.dll

2.0.50727.5420

212,992

09-Jul-2013

06:41

system.resources.dll

2.0.50727.5420

221,184

09-Jul-2013

06:36

system.resources.dll

2.0.50727.5420

217,088

09-Jul-2013

06:33

system.resources.dll

2.0.50727.5420

204,800

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

233,472

09-Jul-2013

06:36

system.resources.dll

2.0.50727.5420

217,088

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

196,608

09-Jul-2013

06:35

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:34

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:34

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

266,240

09-Jul-2013

06:46

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:46

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

184,320

09-Jul-2013

06:47

system.resources.dll

2.0.50727.5420

184,320

09-Jul-2013

06:33

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

22:46

For all supported x64-based versions of systemsGDR service branch

File name

File version

File size

Date

Time

system.dll

2.0.50727.5484

3,198,976

06-Mar-2014

22:47

system.resources.dll

2.0.50727.5420

241,664

08-Jul-2013

12:34

system.resources.dll

2.0.50727.5420

204,800

08-Jul-2013

12:43

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:41

system.resources.dll

2.0.50727.5420

212,992

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

294,912

08-Jul-2013

12:33

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:34

system.resources.dll

2.0.50727.5420

212,992

08-Jul-2013

12:44

system.resources.dll

2.0.50727.5420

221,184

08-Jul-2013

12:42

system.resources.dll

2.0.50727.5420

217,088

08-Jul-2013

12:37

system.resources.dll

2.0.50727.5420

204,800

08-Jul-2013

12:50

system.resources.dll

2.0.50727.5420

233,472

08-Jul-2013

12:50

system.resources.dll

2.0.50727.5420

217,088

08-Jul-2013

12:42

system.resources.dll

2.0.50727.5420

196,608

08-Jul-2013

12:42

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:43

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:46

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:42

system.resources.dll

2.0.50727.5420

208,896

08-Jul-2013

12:42

system.resources.dll

2.0.50727.5420

266,240

08-Jul-2013

12:49

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:47

system.resources.dll

2.0.50727.5420

200,704

08-Jul-2013

12:42

system.resources.dll

2.0.50727.5420

184,320

08-Jul-2013

12:43

system.resources.dll

2.0.50727.5420

184,320

08-Jul-2013

12:48

system.dll

2.0.50727.5484

3,198,976

06-Mar-2014

22:46

LDR service branch

File name

File version

File size

Date

Time

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

22:48

system.resources.dll

2.0.50727.5420

241,664

09-Jul-2013

06:36

system.resources.dll

2.0.50727.5420

204,800

09-Jul-2013

06:33

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:31

system.resources.dll

2.0.50727.5420

212,992

09-Jul-2013

06:38

system.resources.dll

2.0.50727.5420

294,912

09-Jul-2013

06:38

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:44

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:36

system.resources.dll

2.0.50727.5420

212,992

09-Jul-2013

06:39

system.resources.dll

2.0.50727.5420

221,184

09-Jul-2013

06:31

system.resources.dll

2.0.50727.5420

217,088

09-Jul-2013

06:42

system.resources.dll

2.0.50727.5420

204,800

09-Jul-2013

06:42

system.resources.dll

2.0.50727.5420

233,472

09-Jul-2013

06:38

system.resources.dll

2.0.50727.5420

217,088

09-Jul-2013

06:43

system.resources.dll

2.0.50727.5420

196,608

09-Jul-2013

06:28

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:42

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:43

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:42

system.resources.dll

2.0.50727.5420

208,896

09-Jul-2013

06:43

system.resources.dll

2.0.50727.5420

266,240

09-Jul-2013

06:44

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:43

system.resources.dll

2.0.50727.5420

200,704

09-Jul-2013

06:33

system.resources.dll

2.0.50727.5420

184,320

09-Jul-2013

06:44

system.resources.dll

2.0.50727.5420

184,320

09-Jul-2013

06:35

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

22:46

For all supported IA-64-based versions of systemsGDR service branch

File name

File version

File size

Date

Time

system.dll

2.0.50727.5484

3,198,976

06-Mar-2014

22:45

system.resources.dll

2.0.50727.5420

212,992

08-Jul-2013

12:47

system.resources.dll

2.0.50727.5420

212,992

08-Jul-2013

12:47

system.resources.dll

2.0.50727.5420

233,472

08-Jul-2013

12:52

system.resources.dll

2.0.50727.5420

217,088

08-Jul-2013

12:47

system.resources.dll

2.0.50727.5420

184,320

08-Jul-2013

12:52

system.resources.dll

2.0.50727.5420

184,320

08-Jul-2013

12:50

system.dll

2.0.50727.5484

3,198,976

06-Mar-2014

22:46

LDR service branch

File name

File version

File size

Date

Time

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

22:45

system.resources.dll

2.0.50727.5420

212,992

09-Jul-2013

06:30

system.resources.dll

2.0.50727.5420

212,992

09-Jul-2013

06:30

system.resources.dll

2.0.50727.5420

233,472

09-Jul-2013

06:31

system.resources.dll

2.0.50727.5420

217,088

09-Jul-2013

06:34

system.resources.dll

2.0.50727.5420

184,320

09-Jul-2013

06:28

system.resources.dll

2.0.50727.5420

184,320

09-Jul-2013

06:34

system.dll

2.0.50727.7058

3,198,976

06-Mar-2014

22:46



Applies toThis article applies to the following:

  • Microsoft .NET Framework 3.5.1 when used with:

    • Windows 7 Service Pack 1

    • Windows Server 2008 R2 Service Pack 1

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