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Category:   Application (Generic)  >   Microsoft Hyper-V Vendors:   Microsoft
Microsoft Hyper-V Input Validation Flaw Lets Remote Authenticated Guest Users Deny Service on the Host System
SecurityTracker Alert ID:  1032117
SecurityTracker URL:  http://securitytracker.com/id/1032117
CVE Reference:   CVE-2015-1647   (Links to External Site)
Date:  Apr 14 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Microsoft Hyper-V. A remote authenticated user can cause denial of service conditions on the target system.

A remote authenticated user on a guest virtual machine (VM) can run a specially crafted application to trigger an input validation flaw and prevent the Virtual Machine Manager from managing other VMs on the target host system.

Anton Gostev reported this vulnerability.

Impact:   A remote authenticated user in a guest virtual machine (VM) can prevent the Virtual Machine Manager from managing other VMs on the target host system.
Solution:   The vendor has issued the following fixes:

Windows 8.1 for x64-based Systems:

https://www.microsoft.com/downloads/details.aspx?familyid=0a3233f9-19bb-4489-89c4-1f60d4f74817

Windows Server 2012 R2:

https://www.microsoft.com/downloads/details.aspx?familyid=2673989c-b44a-4329-83a4-a41434851ba6

Windows Server 2012 R2 (Server Core installation):

https://www.microsoft.com/downloads/details.aspx?familyid=2673989c-b44a-4329-83a4-a41434851ba6

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms15-042

Vendor URL:  technet.microsoft.com/library/security/ms15-042 (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  Windows (2008)

Message History:   None.


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