今日我将给我们演示我是怎么处理VulnHub挑战赛这道名为Pipe标题的。
当然CTF玩的便是思路，这篇文章的思路纷歧定是更好的。只是作为抛砖，欢迎我们在文尾下载这道标题来玩！
枚举
PORT      STATE SERVICE REASON  VERSION
22/tcp    open  ssh     syn-ack OpenSSH 6.7p1 Debian 5 (protocol 2.0)
| ssh-hostkey:
|   1024 16:48:50:89:e7:c9:1f:90:ff:15:d8:3e:ce:ea:53:8f (DSA)
|   2048 ca:f9:85:be:d7:36:47:51:4f:e6:27:84:72:eb:e8:18 (RSA)
|_  256 d8:47:a0:87:84:b2:eb:f5:be:fc:1c:f1:c9:7f:e3:52 (ECDSA)
80/tcp    open  http    syn-ack Apache httpd
| http-auth:| HTTP/1.1 401 Unauthorized
|_  Basic realm=index.php
|_http-server-header: Apache
|_http-title: 401 Unauthorized
111/tcp   open  rpcbind syn-ack 2-4 (RPC #100000)
| rpcinfo:
|   program version   port/proto  service
|   100000  2,3,4        111/tcp  rpcbind
|   100000  2,3,4        111/udp  rpcbind
|   100024  1          42192/udp  status
|_  100024  1          47286/tcp  status
47286/tcp open  status  syn-ack 1 (RPC #100024)
MAC Address: 00:0C:29:05:96:3D (VMware)
Device type: general purpose
Running: Linux 3.X|4.X
OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4
OS details: Linux 3.2 - 4.0
Uptime guess: 199.640 days (since Sat May  9 04:40:31 2019)
Network Distance: 1 hop
TCP Sequence Prediction: Difficulty=262 (Good luck!)
IP ID Sequence Generation: All zeros
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
服务枚举

HTTP枚举
针对80端口运转OWASP dirbuster暴露出/scriptz/中的JavaScript和PHP文件

源代码审计
php.js Interrogation：
js.php源代码中显现了序列号函数，留意本例的结尾：
function serialize(mixed_value) {
//  discuss at: http://phpjs.org/functions/serialize/
// original by: Arpad Ray (mailto:arpad@php.net)
// improved by: Dino
// improved by: Le Torbi (http://www.letorbi.de/)
// improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net/)
// bugfixed by: Andrej Pavlovic
// bugfixed by: Garagoth
// bugfixed by: Russell Walker (http://www.nbill.co.uk/)
// bugfixed by: Jamie Beck (http://www.terabit.ca/)
// bugfixed by: Kevin van Zonneveld
//  (http://kevin.vanzonneveld.net/)
// bugfixed by: Ben (http://benblume.co.uk/)
//    input by: DtTvB  (http://dt.in.th/2008-09-16.string-length-in-bytes.h
//    input by: Martin (http://www.erlenwiese.de/)
//        note: We feel the main purpose of this function should be to ease the transport of data between php & js
//        note: Aiming for PHP-compatibility, we have to translate objects to arrays
//   example 1: serialize(['Kevin', 'van', 'Zonneveld']);
//   returns 1:'a:3:{i:0;s:5:"Kevin";i:1;s:3:"van";i:2;s:9:"Zonneveld";}'
//   example 2: serialize({firstName:'Kevin', midName: 'van', surName:'Zonneveld'});
//   returns 2: 'a:3:{s:9:"firstName";s:5:"Kevin";s:7:"midName";s:3:"van";s:7:"surName";s:9:"Zonneveld";}'
log.php.BAK
对源代码进行审计发现，它运用Js文件进行序列化

Burp Suite – POST恳求
修正POST恳求，提交到index.php

之后Burp确认了这个序列化目标：

解码字符串

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