#
# This script was written by Renaud Deraison <deraison@nessus.org>
#
# See the Nessus Scripts License for details
#
# Ref (for the MITM attack) :
#  To: bugtraq@securityfocus.com
#  Subject: Microsoft Terminal Services vulnerable to MITM-attacks.
#  From: Erik Forsberg <forsberg+btq@cendio.se>
#  Date: 02 Apr 2003 00:05:44 +0200
#

if(description)
{
 script_id(10940);
 script_version ("$Revision$");
 script_bugtraq_id(7258);
 script_cve_id("CAN-2001-0540");

 name["english"] = "Windows Terminal Service Enabled";

 script_name(english:name["english"]);

    desc["english"] = "
The Terminal Services are enabled on the remote host.

Terminal Services allow a Windows user to remotely obtain
a graphical login (and therefore act as a local user on the
remote host).

If an attacker gains a valid login and password, he may
be able to use this service to gain further access
on the remote host.


Note that RDP (the Remote Desktop Protocol) is vulnerable
to Man-in-the-middle attacks, making it easy for attackers to
steal the credentials of legitimates users by impersonating the
Windows server.

Solution : Disable the Terminal Services if you do not use them, and
do not allow this service to run across the internet

Risk factor : Medium";


 script_description(english:desc["english"]);
 

 summary["english"] = "Connects to the remote terminal server";
 script_summary(english:summary["english"], francais:summary["francais"]);

 script_category(ACT_GATHER_INFO);

 script_copyright(english:"This script is Copyright (C) 2002 Renaud Deraison");

 family["english"] = "Useless services";
 family["francais"] = "Services inutiles";
 script_family(english:family["english"], francais:family["francais"]);
 script_dependencie("find_service.nes");

 exit(0);
}

include("misc_func.inc");

port = 3389;
if(get_port_state(port))
{
   soc = open_sock_tcp(port);
   if(!soc)exit(0);
   str = raw_string(0x03, 0x00, 0x00, 0x0B, 0x06, 0xE0,
       		    0x00, 0x00, 0x00, 0x00, 0x00);
   send(socket:soc, data:str);
   r = recv(socket:soc, length:11);
   if(!r)exit(0);

   if(ord(r[0]) == 0x03) {
     security_warning(port);
     register_service(port:port, proto:"msrdp");
   }
   close(soc);
}