MicrosoftKB3091287MS15-105: Vulnerability in Hyper-V could allow security feature bypass: September 8, 2015
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<html><body><p>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.</p><h2>Summary</h2><div>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.<br /><br /> To learn more about the vulnerability, see <a href=“https://technet.microsoft.com/library/security/ms15-105” target=“_self”>Microsoft Security Bulletin MS15-105</a>. </div><h2>More Information</h2><div><span>Important </span><ul><li>All future security and nonsecurity updates for Windows 8.1 and Windows Server 2012 R2 require update <a href=“https://support.microsoft.com/en-us/help/2919355” target=“_self”>2919355</a> to be installed. We recommend that you install update <a href=“https://support.microsoft.com/en-us/help/2919355” target=“_self”>2919355</a> on your Windows 8.1-based or Windows Server 2012 R2-based computer so that you receive future updates. </li><li>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 <a href=“https://technet.microsoft.com/en-us/library/hh825699” target=“_self”>Add language packs to Windows</a>.<br /></li></ul></div><h2>More information about this security update</h2><div>The following articles contain more information about this security update as it relates to individual product versions. The articles may contain known issue information. <ul><li><a href=“https://support.microsoft.com/help/3087088” target=“_self”>3087088</a> MS15-105: Description of the security update for Hyper-V: September 8, 2015<br /></li></ul></div><h2>How to obtain and install the update</h2><div><a></a><h3>Method 1: Windows Update</h3><div>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 <br /><a href=“https://www.microsoft.com/security/pc-security/updates.aspx” target=“_self”>Get security updates automatically</a>. <br /><br /></div><div><div><div><span><span></span></span><span><span>Method 2: Microsoft Download Center</span></span></div><div><span><div>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.<br /><br />Click the download link in <a href=“https://technet.microsoft.com/library/security/ms15-105” target=“_self”>Microsoft Security Bulletin MS15-105</a> that corresponds to the version of Windows that you are running. <br /></div><br /></span></div></div></div></div><h2>More Information</h2><div><div><div><div><span><span></span></span><span><span>Security update deployment information</span></span></div><div><span><div><h4>Windows 8.1 (Pro and Enterprise editions)<br /></h4><span>Reference Table</span><br /><br />The following table contains the security update information for this software.<br /><div><table><tr><td><span>Security update file name</span></td><td>For all supported x64-based editions of Windows 8.1:<br /><span>Windows8.1-KB3087088-x64.msu</span></td></tr><tr><td><span>Installation switches</span></td><td>See <a href=“https://support.microsoft.com/help/934307” target=“_self”>Microsoft Knowledge Base Article 934307</a></td></tr><tr><td><span>Restart requirement</span></td><td>A system restart is required after you apply this security update.</td></tr><tr><td><span>Removal information</span></td><td>To uninstall an update installed by WUSA, use the <span>/Uninstall</span> setup switch or click <span>Control Panel</span>, click <span>System and Security</span>, click <span>Windows Update</span>, and then under See also, click <span>Installed updates</span> and select from the list of updates.</td></tr><tr><td><span>File information</span></td><td>See <a href=“https://support.microsoft.com/help/3087088” target=“_self”>Microsoft Knowledge Base Article 3087088</a></td></tr><tr><td><span>Registry key verification</span></td><td><span>Note</span> A registry key does not exist to validate the presence of this update.</td></tr></table></div><h4>Windows Server 2012 R2 (all editions)<br /></h4><span>Reference Table</span><br /><br />The following table contains the security update information for this software.<br /><div><table><tr><td><span>Security update file name</span></td><td>For all supported editions of Windows Server 2012 R2:<br /><span>Windows8.1-KB3087088-x64.msu</span></td></tr><tr><td><span>Installation switches</span></td><td>See <a href=“https://support.microsoft.com/help/934307” target=“_self”>Microsoft Knowledge Base Article 934307</a></td></tr><tr><td><span>Restart requirement</span></td><td>A system restart is required after you apply this security update.</td></tr><tr><td><span>Removal information</span></td><td>To uninstall an update installed by WUSA, use the <span>/Uninstall</span> setup switch or click <span>Control Panel</span>, click <span>System and Security</span>, click <span>Windows Update</span>, and then under See also, click <span>Installed updates</span> and select from the list of updates.</td></tr><tr><td><span>File information</span></td><td>See <a href=“https://support.microsoft.com/help/3087088” target=“_self”>Microsoft Knowledge Base Article 3087088</a></td></tr><tr><td><span>Registry key verification</span></td><td><span>Note</span> A registry key does not exist to validate the presence of this update.</td></tr></table></div><h4>Windows 10 (all editions)<br /></h4><span>Reference Table</span><br /><br />The following table contains the security update information for this software.<br /><div><table><tr><td><span>Security update file name</span></td><td>For all supported x64-based editions of Windows 10:<br /><span>Windows10.0-KB3081455-x64.msu</span></td></tr><tr><td><span>Installation switches</span></td><td>See <a href=“https://support.microsoft.com/help/934307” target=“_self”>Microsoft Knowledge Base Article 934307</a></td></tr><tr><td><span>Restart requirement</span></td><td>A system restart is required after you apply this security update.</td></tr><tr><td><span>Removal information</span></td><td>To uninstall an update installed by WUSA, use the <span>/Uninstall</span> setup switch or click <span>Control Panel</span>, click <span>System and Security</span>, click <span>Windows Update</span>, and then under See also, click <span>Installed updates</span> and select from the list of updates.</td></tr><tr><td><span>File information</span></td><td>See <a href=“https://support.microsoft.com/help/3081455” target=“_self”>Microsoft Knowledge Base Article 3081455</a></td></tr><tr><td><span>Registry key verification</span></td><td><span>Note</span> A registry key does not exist to validate the presence of this update.</td></tr></table></div></div><br /></span></div></div></div><div><div><div><span><span></span></span><span><span>File hash information</span></span></div><div><span><div><div><table><tr><th>File name</th><th>SHA1 hash</th><th>SHA256 hash</th></tr><tr><td>Windows8.1-KB3087088-x64.msu</td><td>68477794F86C2B770DF459674934FFC79F7D91F4</td><td>3FD0619F7A570454BCB3EB17C8B5428C1C821545DBB435B491F0E88D1BBD9820</td></tr><tr><td>Windows8.1-KB3087088-x64.msu</td><td>68477794F86C2B770DF459674934FFC79F7D91F4</td><td>3FD0619F7A570454BCB3EB17C8B5428C1C821545DBB435B491F0E88D1BBD9820</td></tr><tr><td>Windows8.1-KB3087088-x64.msu</td><td>68477794F86C2B770DF459674934FFC79F7D91F4</td><td>3FD0619F7A570454BCB3EB17C8B5428C1C821545DBB435B491F0E88D1BBD9820</td></tr></table></div></div><br /></span></div></div></div><div><div><div><span><span></span></span><span><span>How to obtain help and support for this security update</span></span></div><div><span><div>Help for installing updates: <a href=“https://support.microsoft.com/ph/6527” target=“_self”>Support for Microsoft Update</a><br /><br />Security solutions for IT professionals: <a href=“https://technet.microsoft.com/security/bb980617.aspx” target=“_self”>TechNet Security Troubleshooting and Support</a><br /><br />Help for protecting your Windows-based computer from viruses and malware: <a href=“https://support.microsoft.com/contactus/cu_sc_virsec_master” target=“_self”>Virus Solution and Security Center</a><br /><br />Local support according to your country: <a href=“https://support.microsoft.com/common/international.aspx” target=“_self”>International Support</a></div><br /></span></div></div></div></div></body></html>
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