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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen HVMOP_track_dirty_vram Race Condition Lets Local Guest Users Deny Service on the Host System
SecurityTracker Alert ID:  1030887
SecurityTracker URL:  http://securitytracker.com/id/1030887
CVE Reference:   CVE-2014-7154   (Links to External Site)
Updated:  Sep 25 2014
Original Entry Date:  Sep 24 2014
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.2.x, 4.3.x, 4.4.x
Description:   A vulnerability was reported in Xen. A local user on the guest system can cause denial of service conditions on the host system.

A local user on a guest domain controlling HVM guest systems can trigger a race condition in HVMOP_track_dirty_vram() to cause denial of service conditions on the host system.

Only systems using stub domains or other forms of disaggregation of control domains for HVM guests are affected.

Andrew Cooper at Citrix reported this vulnerability.

Impact:   A local user on the guest system can cause denial of service conditions on the host system.
Solution:   The vendor has issued a fix (xsa104.patch; XSA-104).
Vendor URL:  www.xen.org/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any)

Message History:   None.


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