This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
The Xen Project reports :
The code to validate level 2 page table entries is bypassed when
certain conditions are satisfied. This means that a PV guest can
create writable mappings using super page mappings. Such writable
mappings can violate Xen intended invariants for pages which Xen is
supposed to keep read-only. This is possible even if the
'allowsuperpage' command line option is not used.
Malicious PV guest administrators can escalate privilege so as to
control the whole system.
See also :
Update the affected package.
Risk factor :
High / CVSS Base Score : 7.2