MS15-068: Vulnerability in Windows Hyper-V could allow remote code execution: July 14, 2015

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 RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, 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.
More information about this security update
The following articles contain additional information about this security update as it relates to individual product versions. The articles may contain known issue information.
  • 3046359 MS15-068: Description of the security update for Windows Hyper-V: July 14, 2015
  • 3046339 MS15-068: Description of the security update for Windows Hyper-V: July 14, 2015
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.

Note For Windows RT 8.1, this update is available through Windows Update only.

Method 2: Microsoft Download Center

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

Security update deployment information

Windows Server 2008 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file namesFor all supported x64-based editions of Windows Server 2008:
Windows6.0-KB3046359-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementYes, you must restart your system after you apply this security update.
Removal informationWUSA.exe does not support uninstall of updates. To uninstall an update installed by WUSA, click Control Panel, and then click Security. Under Windows Update, click View installed updates and select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3046359
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows Server 2008 R2 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file nameFor all supported x64-based editions of Windows Server 2008 R2:
Windows6.1-KB3046359-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementYes, you must restart your system after you apply this security update.
Removal informationTo uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, and then under Windows Update, click View installed updates and select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3046359
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows 8 and Windows 8.1 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file nameFor all supported x64-based editions of Windows 8.1:
Windows8.1-KB3046339-x64.msu
For all supported x64-based editions of Windows 8.1:
Windows8.1-KB3046359-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementYes, you must restart your system after you apply this security update.
Removal informationTo uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, click Windows Update, and then under See also, click Installed updates and select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3046359
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows Server 2012 and Windows Server 2012 R2 (all editions)

Reference table

The following table contains the security update information for this software.
Security update file nameFor all supported editions of Windows Server 2012:
Windows8-RT-KB3046339-x64.msu
For all supported editions of Windows Server 2012:
Windows8-RT-KB3046359-x64.msu
For all supported editions of Windows Server 2012 R2:
Windows8.1-KB3046339-x64.msu
For all supported editions of Windows Server 2012 R2:
Windows8.1-KB3046359-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementYes, you must restart your system after you apply this security update.
Removal informationTo uninstall an update installed by WUSA, use the /Uninstall setup switch or click Control Panel, click System and Security, click Windows Update, and then under See also, click Installed updates and select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3046359
Registry key verificationNote A registry key does not exist to validate the presence of this update.

File hash information

File nameSHA1 hashSHA256 hash
Windows6.0-KB3046339-x64.msuBE0C3EBAA0E857DD74AD76F10045359221A2780B868D8D7D5DA0D8F93CFBCF3DB5F5A26C803085CBC4874FF1DA95D4265074CA7B
Windows6.1-KB3046339-x64.msu97A48BD2C7E72451B238AF1438D25AE2888220123F1C5F0B83011FA58B9DDCB8EBA0E05A74CA5EA29A2640A0C9D7C9E6CF69249C
Windows8.1-KB3046339-x64.msuB24B39E3D681358A888945686B0F6DBFCBB94E1EB2491F3C6689B9CC65602A0DF8C235E173D6A6D88088CAC492D45B348BE05DDB
Windows8.1-KB3046359-x64.msu55171DFE080DBA3F91414135D247AB151F42CB284AF3AE4D0C826BD633FF906CDCE873114FD48C7DFE8E87593489E35193245FF4
Windows8-RT-KB3046339-x64.msu1DB8F366F714295FE0823F8B610623EDDA815A8BB48934AD90D61480DD6C14ACAD9E0C0329B23DD288AD72E9226E9A83EC6CCB78

How to obtain help and support for this security update

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
update security_patch security_update security bug flaw vulnerability malicious attacker exploit registry unauthenticated buffer overrun overflow specially-formed scope specially-crafted denial of service DoS TSE
Properties

Article ID: 3072000 - Last Review: 07/14/2015 17:22:00 - Revision: 1.0

Windows 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, Windows RT 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8, Windows Server 2008 R2 Service Pack 1

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