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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1855 Microsoft Security Bulletin MS15-068: Vulnerabilities in Windows Hyper-V Could Allow Remote Code Execution (3072000) 15 July 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Windows Publisher: Microsoft Operating System: Windows Windows Server with Hyper-V Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2015-2362 CVE-2015-2361 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS15-068 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS15-068: Vulnerabilities in Windows Hyper-V Could Allow Remote Code Execution (3072000) Bulletin Number: MS15-068 Bulletin Title: Vulnerabilities in Windows Hyper-V Could Allow Remote Code Execution Severity: Critical KB Article: 3072000 Version: 1.0 Published Date: July 14, 2015 Executive Summary This security update resolves vulnerabilities in Microsoft Windows. The vulnerabilities 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 hosted by Hyper-V. An an attacker must have valid logon credentials for a guest virtual machine to exploit this vulnerability. This security update is rated Critical for Windows Hyper-V on Windows Server 2008, Windows Server 2008 R2, Windows 8 and Windows Server 2012, and Windows 8.1 and Windows Server 2012 R2. For more information, see the Affected Software section. Affected Software Windows Server 2008 Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 R2 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows 8 and Windows 8.1 Windows 8 for x64-based Systems Windows 8.1 for x64-based Systems Windows Server 2012 and Windows Server 2012 R2 Windows Server 2012 Windows Server 2012 R2 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2012 (Server Core installation) Windows Server 2012 R2 (Server Core installation) Vulnerability Information Hyper-V Buffer Overflow Vulnerability - CVE-2015-2361 A remote code execution vulnerability exists in Windows Hyper-V in a host context if an authenticated and privileged user on a guest virtual machine hosted by Hyper-V runs a specially crafted application. To exploit this vulnerability, an attacker must have valid logon credentials for a guest virtual machine. Systems where Windows Hyper-V is installed are primarily at risk. The security update addresses the vulnerability by correcting how Hyper-V handles packet size memory initialization in guest virtual machines. Microsoft received information about this vulnerability through coordinated vulnerability disclosure. When this security bulletin was originally issued Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers. Hyper-V System Data Structure Vulnerability - CVE-2015-2362 A remote code execution vulnerability exists in Windows Hyper-V in a host context if an authenticated and privileged user on a guest virtual machine hosted by Hyper-V runs a specially crafted application. To exploit this vulnerability, an attacker must have valid logon credentials for a guest virtual machine. Systems where Windows Hyper-V is installed are primarily at risk. The security update addresses the vulnerability by correcting how Hyper-V initializes system data structures in guest virtual machines. Microsoft received information about this vulnerability through coordinated vulnerability disclosure. When this security bulletin was originally issued Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers. - --------------------------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 iQIVAwUBVaWZyX6ZAP0PgtI9AQIVMw/7BXtkVyO8Xoen5KNgubccdOtLqUzXXrx7 tWuNIz/xsO4rHRlHOk+3E271s9OlGuMlkY5XcF28pca5edbKCdq/MHflfOxg6Ueu nUS1R4pMQWen0YeE/AkXZrI9OhipJO0LLcYd5z+5I3IWxpcVeVSgWXYYs10dSIhh okaNdtn00EbHrchbYCrTlS1nZOZT6/PsI1jFKsm/J91jPXUPx+lFCa2wmwzSeNsc ZcHkLFsri1iIirKlxK7VRbFxKnD/YMUE+QfvH+pc5vZ/Tynb8veoloywo3a6aR4p R1ibuPrkpIzd1XiQzvHEy2Hdmmc9nqVAGYc0+EVzIgp0OPzKLfbIaq9o8LJK/UAG jqd2dOaPZqgAKVne4rrez+ssCqJ35N/ljdV3kCRexiGRFWgfLsaga4vvL94Gm2xy t52Al5/mSWTCSk1y2Tzbofy2f3zTHl8HSXpHREVLWCY/9lYyyoiWPBmw0lKDElnK DA4JSpXW+iidftONiQwYtiWNWUM9HAsRDMMFejqpFWfKSIUyfZW1YCRWRihHEM4S 38eaAMOEhTJ494kl/a/AfjpHqrbTLwIJpZo609rfHjaEoRSR9Iu4H0cQ8KDpQfz+ sgdO8gWj0jlz1DktAFaup7rt1CN9WIylu2DwwQMrpBsPXtpnYucirneXWg8MEKsi Eb/v5P/FNY0= =XgYW -----END PGP SIGNATURE-----