Windows FTP Server NULL Administrator Password

#
# This script was written by Keith Young <[email protected]>
#
# See the Nessus Scripts License for details
#
# Changes by Tenable:
# - Revised plugin title (2/04/2009)

include("compat.inc");

if(description)
{
 script_id(11160);
 script_version ("$Revision: 1.13 $");
 script_cvs_date("$Date: 2013/01/25 01:19:07 $");

 script_name(english:"Windows FTP Server NULL Administrator Password");

 script_set_attribute(attribute:"synopsis", value:
"Arbitrary files may be read, written or deleted on the remote host." );
 script_set_attribute(attribute:"description", value:
"The remote server is incorrectly configured with a NULL password for the
user 'Administrator' and has FTP enabled." );
 script_set_attribute(attribute:"solution", value:
"Change the Administrator password on this host." );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
 script_set_attribute(attribute:"plugin_publication_date", value: "2002/11/21");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_end_attributes();

 script_summary(english:"Checks for a NULL Windows Administrator FTP password");
 script_category(ACT_GATHER_INFO);
 script_family(english:"FTP");
 
 script_copyright(english:"This script is Copyright (C) 2002-2013 Keith Young");
 
 script_dependencie("ftpserver_detect_type_nd_version.nasl", "DDI_FTP_Any_User_Login.nasl");
 script_require_ports("Services/ftp", 21);
 exit(0);
}

#
# The script code starts here : 
#

include("global_settings.inc");
include('ftp_func.inc');

port = get_ftp_port(default: 21);

if (get_kb_item("ftp/"+port+"/AnyUser"))
 exit(0, "The FTP server on port "+port+" allows random usernames.");
 
if (supplied_logins_only) exit(0, "Nessus is currently configured to not log in with user accounts not specified in the scan policy.");

soc = open_sock_tcp(port);
if (! soc) exit(1, "Cannot to TCP port "+port+".");

if (ftp_authenticate(socket:soc, user:"Administrator", pass:"")) security_hole(port);
else exit(0, "The FTP server on port "+port+" is not affected.");