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)
$settings['single_user_login'] = getPostValue ( 'form_single_user_login' );
$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)
$my_theme = '';
$currenttab = getPostValue ( 'currenttab' );
save_pref ( $_POST, 'post' );
if ( ! empty ( $my_theme ) ) {
$theme = 'themes/'. $my_theme . '_pref.php';
include_once $theme;
save_pref ( $webcal_theme, 'theme' );
}
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