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Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for Citrix XenServer) Xen Compatibility Mode Argument Translation Flaw Lets Local Guest Users Deny Service on the Host System
SecurityTracker Alert ID:  1031352
SecurityTracker URL:  http://securitytracker.com/id/1031352
CVE Reference:   CVE-2014-8866   (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 user on a guest system can cause denial of service conditions on the host system. Citrix XenServer is affected.

The use of compatibility mode hypercall argument translation in HVM guests allows a local user on an HVM guest to set specially crafted register values to cause the target host system to crash.

x86 systems are affected. ARM systems are not affected.

Jan Beulich at SUSE reported this vulnerability.

Impact:   A local user on a guest system can cause denial of service conditions on the host 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.
Nov 28 2014 Xen Compatibility Mode Argument Translation Flaw Lets Local Guest Users Deny Service on the Host System



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