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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Domain Destruction Memory Error Lets Local Users on a Privileged Guest System Cause Denial of Service Conditions on the Host System
SecurityTracker Alert ID:  1034030
SecurityTracker URL:  http://securitytracker.com/id/1034030
CVE Reference:   CVE-2015-7814   (Links to External Site)
Date:  Oct 30 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.4.x, 4.5.x, 4.6.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 privileged guest system that has been granted XENMEM_decrease_reservation or XEN_DOMCTL_destroydomain access over a different domain can trigger a toolstack domain race condition and cause the host system to crash.

Systems using libxl, libvirt, or OpenStack are not affected.

ARM systems are affected.

x86 systems are not affected.

This issue was discovered by Ian Campbell of Citrix.

Impact:   A local user on a privileged guest system can cause denial of service conditions on the host system.
Solution:   The vendor has issued a fix (xsa147.patch).

The vendor's advisory is available at:

http://xenbits.xen.org/xsa/advisory-147.html

Vendor URL:  xenbits.xen.org/xsa/advisory-147.html (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any)

Message History:   None.


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