Summary

This security update resolves vulnerabilities in Windows that could allow remote code execution in a host context if a specially crafted application is run by an authenticated and privileged user on a guest virtual machine that is hosted by Hyper-V. An attacker must have valid logon credentials for a guest virtual machine to exploit this vulnerability. To learn more about the vulnerability, see Microsoft Security Bulletin MS15-068.

More Information

Important

  • All future security and nonsecurity updates for Windows 8.1 and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows 8.1-based or Windows Server 2012 R2-based computer so that you receive future updates.

  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, see
Get security updates automatically.



You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS15-068 that corresponds to the version of Windows that you are running.



More 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.



Windows Vista and Windows Server 2008 file information

  • The files that apply to a specific product, milestone (SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.0.6002.18xxx

    Windows Vista SP2 and Windows Server 2008 SP2

    SP2

    GDR

    6.0.6002.23xxx

    Windows Vista SP2 and Windows Server 2008 SP2

    SP2

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.



For all supported x64-based versions of Windows Vista and Windows Server 2008

File name

File version

File size

Date

Time

Platform

Vmicvss.dll

6.0.6002.19378

199,168

04-May-2015

22:33

x64

Vmicvss.dll

6.0.6002.23684

199,168

02-May-2015

15:25

x64

Vmicshutdown.dll

6.0.6002.19378

194,560

04-May-2015

22:33

x64

Vmicshutdown.dll

6.0.6002.23684

194,560

02-May-2015

15:25

x64

Vmictimesync.dll

6.0.6002.19378

197,632

04-May-2015

22:33

x64

Vmictimesync.dll

6.0.6002.23684

197,632

02-May-2015

15:25

x64

Vmicheartbeat.dll

6.0.6002.19378

198,656

04-May-2015

22:33

x64

Vmicheartbeat.dll

6.0.6002.23684

198,656

02-May-2015

15:25

x64

Vmickvpexchange.dll

6.0.6002.19378

259,584

04-May-2015

22:33

x64

Vmickvpexchange.dll

6.0.6002.23684

259,584

02-May-2015

15:25

x64

Windows 7 and Windows Server 2008 R2 file information

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.7601.18xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.7601.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.



For all supported x64-based versions of Windows 7 and Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Vmicvss.dll

6.1.7601.18844

208,384

05-May-2015

20:14

x64

Vmicvss.dll

6.1.7601.23045

208,384

05-May-2015

03:40

x64

Vmicshutdown.dll

6.1.7601.18844

206,848

05-May-2015

20:14

x64

Vmicshutdown.dll

6.1.7601.23045

206,848

05-May-2015

03:40

x64

Vmictimesync.dll

6.1.7601.18844

209,408

05-May-2015

20:14

x64

Vmictimesync.dll

6.1.7601.23045

209,408

05-May-2015

03:40

x64

Vmicheartbeat.dll

6.1.7601.18844

210,432

05-May-2015

20:14

x64

Vmicheartbeat.dll

6.1.7601.23045

210,432

05-May-2015

03:40

x64

Vmickvpexchange.dll

6.1.7601.18844

282,112

05-May-2015

20:14

x64

Vmickvpexchange.dll

6.1.7601.23045

282,112

05-May-2015

03:40

x64

Windows 8 and Windows Server 2012 file information

  • The files that apply to a specific product, milestone (RTM,SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.2.920 0.16 xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.20 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.



For all supported x64-based versions of Windows 8 and Windows Server 2012

File name

File version

File size

Date

Time

Platform

Vmicrdv.dll

6.2.9200.17361

269,824

30-Apr-2015

16:54

x64

Vmicrdv.dll

6.2.9200.21473

269,824

30-Apr-2015

16:52

x64

Vmicvss.dll

6.2.9200.17361

211,968

30-Apr-2015

17:03

x64

Vmicvss.dll

6.2.9200.21473

211,968

30-Apr-2015

17:01

x64

Vmicshutdown.dll

6.2.9200.17361

238,080

30-Apr-2015

17:03

x64

Vmicshutdown.dll

6.2.9200.21473

238,080

30-Apr-2015

17:01

x64

Vmictimesync.dll

6.2.9200.17361

205,312

30-Apr-2015

17:03

x64

Vmictimesync.dll

6.2.9200.21473

205,312

30-Apr-2015

17:01

x64

Vmicheartbeat.dll

6.2.9200.17361

207,872

30-Apr-2015

17:03

x64

Vmicheartbeat.dll

6.2.9200.21473

207,872

30-Apr-2015

17:01

x64

Vmickvpexchange.dll

6.2.9200.17361

281,600

30-Apr-2015

17:03

x64

Vmickvpexchange.dll

6.2.9200.21473

281,600

30-Apr-2015

17:01

x64

Windows 8.1 and Windows Server 2012 R2 file information

  • The files that apply to a specific product, milestone (RTM,SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.920 0.16 xxx

    Windows 8.1 and Windows Server 2012 R2

    RTM

    GDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

Note The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.




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

File name

File version

File size

Date

Time

Platform

Vmicrdv.dll

6.3.9600.17723

154,624

09-Mar-2015

00:20

x64

Vmicvss.dll

6.3.9600.17723

154,624

09-Mar-2015

00:21

x64

Vmicshutdown.dll

6.3.9600.17723

174,592

09-Mar-2015

00:23

x64

Vmictimesync.dll

6.3.9600.17723

145,408

09-Mar-2015

00:23

x64

Vmicguestinterface.dll

6.3.9600.17723

145,920

09-Mar-2015

00:24

x64

Vmicheartbeat.dll

6.3.9600.17723

147,968

09-Mar-2015

00:22

x64

Vmickvpexchange.dll

6.3.9600.17723

206,848

09-Mar-2015

00:25

x64


Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support

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