This script is Copyright (C) 2015 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
The Xen Project reports :
The xl command line utility mishandles long configuration values when
passed as command line arguments, with a buffer overrun.
A semi-trusted guest administrator or controller, who is intended to
be able to partially control the configuration settings for a domain,
can escalate their privileges to that of the whole host.
See also :
Update the affected package.
Risk factor :
Medium / CVSS Base Score : 6.8