攻防世界36-fakebook-CTFWeb

攻防世界36-fakebook-CTFWeb

没发现什么，随便join发现blog有过滤，dirsearch扫描一下，发现robots.txt，和flag.php(不能直接看)，发现源码泄露，下载得源码：

<?php

class UserInfo{
    public $name = "";
    public $age = 0;
    public $blog = "";

    public function __construct($name, $age, $blog)
    {
        $this->name = $name;
        $this->age = (int)$age;
        $this->blog = $blog;
    }

    function get($url){
        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        if($httpCode == 404) {
            return 404;
        }
        curl_close($ch);

        return $output;
    }

    public function getBlogContents (){
        return $this->get($this->blog);
    }

    public function isValidBlog (){
        $blog = $this->blog;
        return preg_match("/^(((http(s?))\:\/\/)?)([0-9a-zA-Z\-]+\.)+[a-zA-Z]{2,6}(\:[0-9]+)?(\/\S*)?$/i", $blog);
    }
}

return preg_match(“/^(((http(s?))