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Category:   Application (Generic)  >   Xen Vendors:   XenSource
Xen Grant Table Release Error Lets Local Guest Users Deny Service on the Host System
SecurityTracker Alert ID:  1028459
SecurityTracker URL:  http://securitytracker.com/id/1028459
CVE Reference:   CVE-2013-1964   (Links to External Site)
Date:  Apr 22 2013
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.0, 4.1
Description:   A vulnerability was reported in Xen. A local guest user can cause denial of service conditions on the host system.

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:   The vendor has issued a fix (xsa50-4.1.patch).
Vendor URL:  www.xen.org/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:   Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 10 2013 (Citrix Issues Fix for XenServer) Xen Grant Table Release Error Lets Local Guest Users Deny Service on the Host System
Citrix has issued a fix for XenServer.



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