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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0925 Microsoft Security Bulletin MS16-045: Security Update for Windows Hyper-V (3143118) 13 April 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Windows with Hyper-V Publisher: Microsoft Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-0090 CVE-2016-0089 CVE-2016-0088 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS16-045 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS16-045: Security Update for Windows Hyper-V (3143118) Bulletin Number: MS16-045 Bulletin Title: Security Update for Windows Hyper-V Severity: Important KB Article: 3143118 Version: 1.0 Published Date: April 12, 2016 Executive Summary This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if an authenticated attacker on a guest operating system runs a specially crafted application that causes the Hyper-V host operating system to execute arbitrary code. Customers who have not enabled the Hyper-V role are not affected. This security update is rated Important for all supported editions of Windows 8.1 for x64-based Systems, Windows Server 2012, Windows Server 2012 R2, and Windows 10 for x64-based Systems. Affected Software Windows 8.1 for x64-based Systems (3135456) Windows Server 2012 and Windows Server 2012 R2 Windows 10 for x64-based Systems[1](3147461) Windows Server 2012 (Server Core installation)(3135456) Windows Server 2012 R2 (Server Core installation)(3135456) [1]Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are available via the Microsoft Update Catalog. Vulnerability Information Hyper-V Remote Code Execution Vulnerability - CVE-2016-0088 A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code. Customers who have not enabled the Hyper-V role are not affected. An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system. The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input. The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list: Vulnerability title CVE number Publicly disclosed Exploited Hyper-V Remote Code Execution Vulnerability CVE-2016-0088 No No Multiple Hyper-V Information Disclosure Vulnerabilities Information disclosure vulnerabilities exist when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerabilities, an attacker on a guest operating system could run a specially crafted application that could cause the Hyper-V host operating system to disclose memory information. Customers who have not enabled the Hyper-V role are not affected. An attacker who successfully exploited the vulnerabilities could gain access to information on the Hyper-V host operating system. The security update addresses the vulnerabilities by correcting how Hyper-V validates guest operating system user input. The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list: Vulnerability title CVE number Publicly disclosed Exploited Hyper-V Information Disclosure Vulnerability CVE-2016-0089 No No Hyper-V Information Disclosure Vulnerability CVE-2016-0090 No No - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVw1xtX6ZAP0PgtI9AQIu3xAAv7ubGV0+Wgg7OauPZ3IXilClKlaKQ2o+ ACeXciWvNrG23FVSDhiYqXiaMuTOHCO5B/zszz6lJJtQcB+J/X9ZKuAOe80soRpH FK3ceD+u9I/HDLAobstR0zYzQhsCZtbiFVrgt7gLk5nlzS9/q151/vpx0B4WbKAF pBG18AnXRMp9DfV/hEoQax4dMz8nIfXUIJ8pOs0uICe443yfLW8M+c5NeYuVmaR9 i4HHYu19Vv134zur3t2s0jsqZFf3qpeCgjO4ax60XM0ue08TrfRwj2VAvfOfh2Ka RwPhzvr3pswLL22FMeFAJoVxHE8IMvZ7XA6K/vvVbuCP4Lj3jJbRPhPe1ZzjOJ7k SyP+yLEstjpw46yDwG7GH1wECspZ3EWEaxXuEWuMn5P5w3TPzxjnGqFmaSWkSk3K QNSnP6Szv5PGBVe80E5QEMincttQ84IHSyAqOd1vwGKfxWRuZOofHlXCw6+NQmdy lzd0hWZDzSCN10E5FVAIU33S0jVhvlzBBWBlpCfjxX8fKBuesQSR8ICr1QbHl8HB 0lobZ2g0G4WgRdNsDdmMaYYPY91aZIv7Aw21PpxWHBmI6zmOw5UIN/7VF+w4LEzd cVZiQg1X+7Avnp4U6+dH0fkv+YwH+/ZxVNItcyWJmImkPk75FyUawP/AjKy0Sy0P MXuL3d7JaCc= =QJJe -----END PGP SIGNATURE-----