This script is Copyright (C) 2016 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
The Xen Project reports :
libxl's device-handling code freely uses and trusts information from
the backend directories in xenstore.
A malicious driver domain can deny service to management tools.
See also :
Update the affected package.
Risk factor :
Low / CVSS Base Score : 1.9