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Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for Citrix XenServer) Xen Privileged Ring Access Flaw Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1029664
SecurityTracker URL:  http://securitytracker.com/id/1029664
CVE Reference:   CVE-2013-4554   (Links to External Site)
Date:  Jan 22 2014
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.6, 6.0, 6.1, 6.2
Description:   A vulnerability was reported in Xen. A local user on the guest operating system can obtain elevated privileges on the target guest operating system. Citrix XenServer is affected.

A local user running code in the intermediate privilege rings (e.g., rings 1 and 2) on the guest operating system can make a hypercall to gain elevated privileges on the target HVM guest operating system.

Jan Beulich reported this vulnerability.

Impact:   A local user on the guest operating system can obtain elevated privileges on the target guest operating system.
Solution:   Citrix has issued a fix for Citrix XenServer.

The Citrix advisory is available at:

http://support.citrix.com/article/CTX140038

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 26 2013 Xen Privileged Ring Access Flaw Lets Local Users Gain Elevated Privileges



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