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Date: Mon Apr 23 2012 - 14:02:26 CDT

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 -------------------------------------------------
 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

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