BugTraq
WebCalendar <= 1.2.4 Two Security Vulnerabilities Apr 23 2012 07:02PM
n0b0d13s gmail com

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

[ reply ]


 

Privacy Statement
Copyright 2010, SecurityFocus