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MS15-105: Vulnerability in Hyper-V could allow security feature bypass: September 8, 2015

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Summary

This security update resolves a vulnerability in Windows that could allow security feature bypass if an attacker runs a specially crafted application that could cause Windows Hyper-V to apply access control list (ACL) configuration settings incorrectly. Customers who have not enabled the Hyper-V role are not affected.

To learn more about the vulnerability, see Microsoft Security Bulletin MS15-105.

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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.

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More information about this security update

The following articles contain more information about this security update as it relates to individual product versions. The articles may contain known issue information.
  • 3087088 MS15-105: Description of the security update for Hyper-V: September 8, 2015

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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.

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 MS15-105 that corresponds to the version of Windows that you are running.

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More Information

Security update deployment information

Windows 8.1 (Pro and Enterprise 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-KB3087088-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementA system restart is required 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 3087088
Registry key verificationNote A registry key does not exist to validate the presence of this update.

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 R2:
Windows8.1-KB3087088-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementA system restart is required 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 3087088
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows 10 (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 10:
Windows10.0-KB3081455-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementA system restart is required 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 3081455
Registry key verificationNote A registry key does not exist to validate the presence of this update.
File hash information
File nameSHA1 hashSHA256 hash
Windows8.1-KB3087088-x64.msu68477794F86C2B770DF459674934FFC79F7D91F43FD0619F7A570454BCB3EB17C8B5428C1C821545DBB435B491F0E88D1BBD9820
Windows8.1-KB3087088-x64.msu68477794F86C2B770DF459674934FFC79F7D91F43FD0619F7A570454BCB3EB17C8B5428C1C821545DBB435B491F0E88D1BBD9820
Windows8.1-KB3087088-x64.msu68477794F86C2B770DF459674934FFC79F7D91F43FD0619F7A570454BCB3EB17C8B5428C1C821545DBB435B491F0E88D1BBD9820
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

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Keywords: kb, atdownload, kbbug, kbexpertiseinter, kbfix, kblangall, kbmustloc, kbsecbulletin, kbsecreview, kbsecurity, kbsecvulnerability, kbsurveynew

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Article Info
Article ID : 3091287
Revision : 1
Created on : 1/7/2017
Published on : 9/8/2015
Exists online : False
Views : 269