September 9, 2014 This security update has been re-released and contains updated files. We recommend that you apply this updated security update.


View products that this article applies to.

Introduction

This security update resolves a vulnerability in the Microsoft .NET Framework 4.5 and the .NET Framework 4.5.1 that could allow elevation of privilege on a server system if a user views a specially crafted webpage by using a web browser that can run ASP.NET applications.

This security update applies to Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1, Windows Vista Service Pack 2, and Windows Server 2008 Service Pack 2.

Summary

Microsoft has released security advisory 2905247 for the Microsoft .NET Framework.

How to obtain help and support for this security update

Help installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

More information about this security update

Download information

To install this update, install it from Microsoft Windows Update.

Additionally, you can install this update from the Microsoft Download Center.

Installation information

Before you apply this update, make sure that you resolve any view state message authentication code (MAC) errors that you may have. For information about how to do this, see Resolving view state message authentication code (MAC) errors in the Microsoft Knowledge Base.

Prerequisites

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

Command-line switches for this update

See 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 are 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 systems

GDR service branch

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.0.30319.34237

41,616

25-Jul-2014

15:35

aspnet_wp.exe

4.0.30319.34237

43,152

25-Jul-2014

15:35

System.Web.ApplicationServices.dll

4.0.30319.34237

62,688

25-Jul-2014

09:36

System.Web.Extensions.dll

4.0.30319.34237

1,850,560

25-Jul-2014

09:36

System.Web.dll

4.0.30319.34237

5,456,528

25-Jul-2014

09:36

System.Web.Mobile.dll

4.0.30319.34237

839,848

25-Jul-2014

09:36

webengine.dll

4.0.30319.34237

24,712

25-Jul-2014

15:35

webengine4.dll

4.0.30319.34237

509,584

25-Jul-2014

15:35

msvcr120_clr0400.dll

12.0.51677.34237

875,688

25-Jul-2014

15:35

LDR service branch

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.0.30319.36249

41,616

25-Jul-2014

09:46

aspnet_wp.exe

4.0.30319.36249

43,144

25-Jul-2014

09:46

System.Web.ApplicationServices.dll

4.0.30319.36249

62,680

25-Jul-2014

08:41

System.Web.Extensions.dll

4.0.30319.36249

1,850,552

25-Jul-2014

08:41

System.Web.dll

4.0.30319.36249

5,456,520

25-Jul-2014

08:41

System.Web.Mobile.dll

4.0.30319.36249

839,856

25-Jul-2014

08:41

webengine.dll

4.0.30319.36249

24,720

25-Jul-2014

09:46

webengine4.dll

4.0.30319.36249

509,584

25-Jul-2014

09:46

msvcr120_clr0400.dll

12.0.52249.36249

875,696

25-Jul-2014

09:46

For all supported x64-based versions of systems

GDR service branch

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.0.30319.34237

45,208

25-Jul-2014

15:51

Aspnet_perf.dll

4.0.30319.34237

41,616

25-Jul-2014

15:35

aspnet_wp.exe

4.0.30319.34237

47,752

25-Jul-2014

15:51

aspnet_wp.exe

4.0.30319.34237

43,152

25-Jul-2014

15:35

System.Web.ApplicationServices.dll

4.0.30319.34237

62,688

25-Jul-2014

09:36

System.Web.Extensions.dll

4.0.30319.34237

1,850,560

25-Jul-2014

09:36

System.Web.dll

4.0.30319.34237

5,450,376

25-Jul-2014

15:51

System.Web.dll

4.0.30319.34237

5,456,528

25-Jul-2014

09:36

System.Web.Mobile.dll

4.0.30319.34237

839,848

25-Jul-2014

09:36

webengine.dll

4.0.30319.34237

26,760

25-Jul-2014

15:51

webengine.dll

4.0.30319.34237

24,712

25-Jul-2014

15:35

webengine4.dll

4.0.30319.34237

621,208

25-Jul-2014

15:51

webengine4.dll

4.0.30319.34237

509,584

25-Jul-2014

15:35

msvcr120_clr0400.dll

12.0.51677.34237

869,544

25-Jul-2014

15:51

msvcr120_clr0400.dll

12.0.51677.34237

875,688

25-Jul-2014

15:35

LDR service branch

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.0.30319.36249

45,200

25-Jul-2014

09:59

Aspnet_perf.dll

4.0.30319.36249

41,616

25-Jul-2014

09:46

aspnet_wp.exe

4.0.30319.36249

47,752

25-Jul-2014

09:59

aspnet_wp.exe

4.0.30319.36249

43,144

25-Jul-2014

09:46

System.Web.ApplicationServices.dll

4.0.30319.36249

62,680

25-Jul-2014

08:41

System.Web.Extensions.dll

4.0.30319.36249

1,850,552

25-Jul-2014

08:41

System.Web.dll

4.0.30319.36249

5,450,376

25-Jul-2014

09:59

System.Web.dll

4.0.30319.36249

5,456,520

25-Jul-2014

08:41

System.Web.Mobile.dll

4.0.30319.36249

839,856

25-Jul-2014

08:41

webengine.dll

4.0.30319.36249

26,760

25-Jul-2014

09:59

webengine.dll

4.0.30319.36249

24,720

25-Jul-2014

09:46

webengine4.dll

4.0.30319.36249

621,192

25-Jul-2014

09:59

webengine4.dll

4.0.30319.36249

509,584

25-Jul-2014

09:46

msvcr120_clr0400.dll

12.0.52249.36249

869,552

25-Jul-2014

09:59

msvcr120_clr0400.dll

12.0.52249.36249

875,696

25-Jul-2014

09:46



Applies toThis article applies to the following:

  • Microsoft .NET Framework 4.5.1 when used with:

    • Windows 7 Service Pack 1

    • Windows Server 2008 R2 Service Pack 1

    • Windows Vista Service Pack 2

    • Windows Server 2008 Service Pack 2

  • Microsoft .NET Framework 4.5 when used with:

    • Windows 7 Service Pack 1

    • Windows Server 2008 R2 Service Pack 1

    • Windows Vista Service Pack 2

    • Windows Server 2008 Service Pack 2

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