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Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for XenServer) Xen Grant Table Release Error Lets Local Guest Users Deny Service on the Host System
SecurityTracker Alert ID:  1028535
SecurityTracker URL:  http://securitytracker.com/id/1028535
CVE Reference:   CVE-2013-1964   (Links to External Site)
Date:  May 10 2013
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 system. Citrix XenServer is affected.

A local administrative user on a guest operating system can release a non-v1 non-transitive grant after performing a grant copy operation to cause Xen to release an unrelated grant reference. This may result in denial of service conditions on the target host system.

The user may also be able to obtain potentially sensitive information or obtain elevated privileges, but this was not confirmed in the report.

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

The Citrix advisory is available at:

http://support.citrix.com/article/CTX137657

Cause:   Access control error, State error

Message History:   This archive entry is a follow-up to the message listed below.
Apr 22 2013 Xen Grant Table Release Error Lets Local Guest Users Deny Service on the Host System



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