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Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for Citrix XenServer) Xen PHYSDEVOP_{prepare,release}_msix Access Control Flaw Lets Local Guest Users Deny Service on the Host
SecurityTracker Alert ID:  1031350
SecurityTracker URL:  http://securitytracker.com/id/1031350
CVE Reference:   CVE-2014-1666   (Links to External Site)
Date:  Dec 11 2014
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Xen. A local guest user can cause denial of service conditions on the host. Citrix XenServer is affected.

A local user on a guest operating system can access PHYSDEVOP_{prepare,release}_msix operations to cause denial of service conditions on other guests or on the host system.

Only PV guests are affected.

Impact:   A local user can cause denial of service conditions on the target system.
Solution:   Citrix has issued a fix for XenServer.

For 6.0.0: CTX141721
For 6.0.2 Common Criteria: CTX141719
For 6.0.2: CTX141720
For 6.1: CTX141718
For 6.2 Service Pack 1: CTX141717

The Citrix advisory is available at:

http://support.citrix.com/article/CTX200288

Vendor URL:  www.xen.org/ (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Jan 25 2014 Xen PHYSDEVOP_{prepare,release}_msix Access Control Flaw Lets Local Guest Users Deny Service on the Host



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