Applies ToWindows Server 2012 R2 Datacenter Windows Server 2012 R2 Standard Windows Server 2012 R2 Essentials Windows Server 2012 R2 Foundation Windows 8.1 Enterprise Windows 8.1 Pro Windows 8.1

Summary

This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow denial of service if an authenticated attacker runs a specially crafted application in a virtual machine (VM) session. Notice that the denial of service does not allow an attacker to execute code or elevate user rights on other VMs that are running on the Hyper-V host. However, the issue could cause other VMs on the host not to be manageable in Virtual Machine Manager.

Introduction

Microsoft has released security bulletin MS15-042. To learn more about this security bulletin:

How to obtain help and support for this security update

Help installing updates:Support for Microsoft UpdateSecurity solutions for IT professionals:TechNet Security Troubleshooting and SupportHelp protect your Windows-based computer from viruses and malware:Virus Solution and Security CenterLocal support according to your country:International Support

More Information

Known issues in this security update

  • After you install this security update, you may find that old file location cleanup operations are affected when you run a storage migration of Cluster Shared Volume (CSV). To resolve this issue, install vmms.exe version 6.3.9600.17787, included in update 3037313. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

    3037313 Old files are not removed after a migration of virtual machine storage in Windows 8.1 or Windows Server 2012 R2

Windows 8.1 (all editions)Reference TableThe following table contains the security update information for this software.

Security update file name

For all supported x64-based editions of Windows 8.1:Windows8.1-KB3047234-x64.msu

Installation switches

See Microsoft Knowledge Base Article 934307

Restart requirement

Yes, you must restart your system after you apply this security update.

Removal information

To uninstall an update that is installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click Windows Update, and under See also, click Installed updates, and then select from the list of updates.

File information

See the file information section.

Registry key verification

Note A registry key does not exist to validate the presence of this update.

Windows Server 2012 R2 (all editions)Reference TableThe following table contains the security update information for this software.

Security update file name

For all supported editions of Windows Server 2012 R2:Windows8.1-KB3047234-x64.msu

Installation switches

See Microsoft Knowledge Base Article 934307

Restart requirement

Yes, you must restart your system after you apply this security update.

Removal information

To uninstall an update installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click Windows Update, and under See also, click Installed updates, and then select from the list of updates.

File information

See the file information section.

Registry key verification

Note A registry key does not exist to validate the presence of this update.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

For all supported x64-based versions of Windows 8.1 and Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Vmms.exe.mui

6.3.9600.17039

861,184

04-Mar-2014

18:07

Not Applicable

Vmms.exe.mui

6.3.9600.17039

851,968

04-Mar-2014

18:06

Not Applicable

Vmms.exe.mui

6.3.9600.17039

980,992

04-Mar-2014

17:59

Not Applicable

Vmms.exe.mui

6.3.9600.17039

997,888

04-Mar-2014

18:06

Not Applicable

Vmms.exe.mui

6.3.9600.17039

784,384

04-Mar-2014

11:29

Not Applicable

Vmms.exe.mui

6.3.9600.17039

937,984

04-Mar-2014

18:02

Not Applicable

Vmms.exe.mui

6.3.9600.17039

815,104

04-Mar-2014

18:06

Not Applicable

Vmms.exe.mui

6.3.9600.17039

953,344

04-Mar-2014

18:07

Not Applicable

Vmms.exe.mui

6.3.9600.17039

884,736

04-Mar-2014

18:06

Not Applicable

Vmms.exe.mui

6.3.9600.17039

921,088

04-Mar-2014

18:06

Not Applicable

Vmms.exe.mui

6.3.9600.17039

482,304

04-Mar-2014

18:06

Not Applicable

Vmms.exe.mui

6.3.9600.17039

485,376

04-Mar-2014

18:04

Not Applicable

Vmms.exe.mui

6.3.9600.17039

834,560

04-Mar-2014

18:02

Not Applicable

Vmms.exe.mui

6.3.9600.17039

894,464

04-Mar-2014

18:03

Not Applicable

Vmms.exe.mui

6.3.9600.17039

922,112

04-Mar-2014

18:02

Not Applicable

Vmms.exe.mui

6.3.9600.17039

871,424

04-Mar-2014

18:02

Not Applicable

Vmms.exe.mui

6.3.9600.17039

896,000

04-Mar-2014

18:02

Not Applicable

Vmms.exe.mui

6.3.9600.17039

865,280

04-Mar-2014

18:03

Not Applicable

Vmms.exe.mui

6.3.9600.17039

855,552

04-Mar-2014

17:58

Not Applicable

Vmms.exe.mui

6.3.9600.17039

794,112

04-Mar-2014

17:58

Not Applicable

Vmms.exe.mui

6.3.9600.17039

344,064

04-Mar-2014

17:59

Not Applicable

Vmms.exe.mui

6.3.9600.17039

360,448

04-Mar-2014

17:59

Not Applicable

Vmms.exe.mui

6.3.9600.17039

360,448

04-Mar-2014

17:59

Not Applicable

Rdvgpuinfo.dll

6.3.9600.17396

61,440

08-Oct-2014

05:58

x64

Vmms.exe

6.3.9600.17729

13,784,064

14-Mar-2015

00:18

x64

Package Name

Package Hash SHA1

Package Hash SHA2

Windows8.1-KB3047234-x64.msu

A5F423BBFEFA3E371B7C5F89366D86BC3B58F6C6

3A9166396B13491207C199A204D58D27230034A2EA8466A3F891A174AE6A0059

Windows8.1-KB3047234-x64.msu

25A4C4F35A74FB331416342D757F8D97182345E1

77CE6D303DAF1EFB7EB2F5F2A7EE186F875FC2CD1F258D5AAEF75C468E89034B

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.