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Category:   Application (Generic)  >   Xen Vendors:   XenSource
Xen Intel VT-d Interrupt Processing Flaw Lets Local Users Deny Service on the Host System
SecurityTracker Alert ID:  1028931
SecurityTracker URL:  http://securitytracker.com/id/1028931
CVE Reference:   CVE-2013-3495   (Links to External Site)
Date:  Aug 21 2013
Impact:   Denial of service via local system
Vendor Confirmed:  Yes  
Version(s): 3.3 and later
Description:   A vulnerability was reported in Xen. A local user on a guest domain can cause denial of service conditions on the host system.

A local user on a guest domain can trigger a flaw in the processing of Message Signaled Interrupts (MSI) interrupts on Intel-based systems.

Domains with access to a device that has bus mastering capability can exploit this flaw.

Systems using Intel VT-d for PCI passthrough are affected if the system firmware can enable System Error Reporting (SERR) in a Host Bridge device.

Gabor Pek from CrySyS Lab reported this vulnerability.

Impact:   A local user on a guest domain can cause denial of service conditions on the host system.
Solution:   No solution was available at the time of this entry.
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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