This script is Copyright (C) 2009-2015 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
SecurityFocus reports :
Varnish is prone to a remote denial-of-service vulnerability because
the application fails to handle certain HTTP requests.
Successfully exploiting this issue allows remote attackers to crash
the affected application denying further service to legitimate users.
See also :
Update the affected package.
Risk factor :
Medium / CVSS Base Score : 5.0
CVSS Temporal Score : 4.1
Public Exploit Available : true