------------------------------------------------- WebCalendar <= 1.2.4 Two Security Vulnerabilities ------------------------------------------------- author..........: Egidio Romano aka EgiX mail............: n0b0d13s[at]gmail[dot]com software link...: https://sourceforge.net/projects/webcalendar/ [-] vulnerable code in /install/index.php (CVE-2012-1495) 674. $y = getPostValue ( 'app_settings' ); 675. if ( ! empty ( $y ) ) { 676. $settings['single_user_login'] = getPostValue ( 'form_single_user_login' ); 677. $settings['readonly'] = getPostValue ( 'form_readonly' ); ... 724. // Save settings to file now. 725. if ( ! empty ( $x ) || ! empty ( $y ) ){ 726. $fd = @fopen ( $file, 'w+b', false ); 727. if ( empty ( $fd ) ) { 728. if ( @file_exists ( $file ) ) { 729. $onloadDetailStr = 730. translate ( 'Please change the file permissions of this file', true ); 731. } else { 732. $onloadDetailStr = 733. translate ( 'Please change includes dir permission', true ); 734. } 735. $onload = "alert('" . $errorFileWriteStr . $file. "\\n" . 736. $onloadDetailStr . ".');"; 737. } else { 738. if ( function_exists ( "date_default_timezone_set" ) ) 739. date_default_timezone_set ( "America/New_York"); 740. fwrite ( $fd, "<?php\r\n" ); 741. fwrite ( $fd, '/* updated via install/index.php on ' . date ( 'r' ) . "\r\n" ); 742. foreach ( $settings as $k => $v ) { 743. if ( $v != '<br />' && $v != '' ) 744. fwrite ( $fd, $k . ': ' . $v . "\r\n" ); 745. } Restricted access to this script isn't properly realized, so an attacker might be able to update /includes/settings.php with arbitrary values or inject PHP code into it. [-] vulnerable code to LFI in /pref.php (CVE-2012-1496) 70. if ( ! empty ( $_POST ) && empty ( $error )) { 71. $my_theme = ''; 72. $currenttab = getPostValue ( 'currenttab' ); 73. save_pref ( $_POST, 'post' ); 74. 75. if ( ! empty ( $my_theme ) ) { 76. $theme = 'themes/'. $my_theme . '_pref.php'; 77. include_once $theme; 78. save_pref ( $webcal_theme, 'theme' ); 79. } Input passed through $_POST['pref_THEME'] isn't properly sanitized before being assigned to $my_theme variable, this can be exploited to include arbitrary local files at line 77. Exploitation of this vulnerability requires authentication and magic_quotes_gpc = off. [-] Disclosure timeline: [02/10/2011] - Vulnerabilities discovered [04/10/2011] - Vendor notified to http://sourceforge.net/support/tracker.php?aid=3418570 [20/02/2012] - First vendor response [28/02/2012] - Vendor fix committed to CVS [29/02/2012] - Version 1.2.5 released [02/03/2012] - CVE numbers requested [02/03/2012] - Assigned CVE-2012-1495 and CVE-2012-1496 [23/04/2012] - Public disclosure
