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Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for XenServer) Xen HVMOP_pagetable_dying() Bug Lets Local Users Deny Service
SecurityTracker Alert ID:  1027767
SecurityTracker URL:  http://securitytracker.com/id/1027767
CVE Reference:   CVE-2012-4538   (Links to External Site)
Date:  Nov 14 2012
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): XenServer 5.0 Update 3, 5.5, 5.6, 5.6 Common Criteria, 5.6 FP 1, 5.6 SP 2, 6.0, 6.0.2, 6.0.2 Common Criteria, 6.1.0
Description:   A vulnerability was reported in Xen. A local user can cause denial of service conditions on the target system. Citrix XenServer is affected.

The HVMOP_pagetable_dying() hypercall does not properly check the caller's pagetable state. A local user can cause denial of service conditions on the target system.

Systems running HVM guests on shadow pagetables (not HAP) are affected.

Impact:   A local user can cause the target hypervisor to crash.
Solution:   Citrix has issued a fix for Citrix XenServer.

The Citrix advisory is available at:

http://support.citrix.com/article/CTX135458

Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Nov 14 2012 Xen HVMOP_pagetable_dying() Bug Lets Local Users Deny Service



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