HTB | Nocturnal
Machine - https://app.hackthebox.com/machines/Nocturnal
IP - 10.10.11.64
NMAP
└─$ nmap -sT -p- --min-rate 10000 10.10.11.64 -Pn -oA nmap_ports
Starting Nmap 7.95 ( <https://nmap.org> ) at 2025-05-14 23:36 IST
Nmap scan report for 10.10.11.64
Host is up (0.80s latency).
Not shown: 65482 filtered tcp ports (no-response), 51 closed tcp ports (conn-refused)
PORT STATE SERVICE
22/tcp open ssh
80/tcp open http
Nmap done: 1 IP address (1 host up) scanned in 104.95 seconds└─$ nmap -sC -sV -p 22,80 10.10.11.64 -Pn -oA nmap_ports_details
Starting Nmap 7.95 ( <https://nmap.org> ) at 2025-05-14 23:42 IST
Nmap scan report for 10.10.11.64
Host is up (0.30s latency).
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 8.2p1 Ubuntu 4ubuntu0.12 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 3072 20:26:88:70:08:51:ee:de:3a:a6:20:41:87:96:25:17 (RSA)
| 256 4f:80:05:33:a6:d4:22:64:e9:ed:14:e3:12:bc:96:f1 (ECDSA)
|_ 256 d9:88:1f:68:43:8e:d4:2a:52:fc:f0:66:d4:b9:ee:6b (ED25519)
80/tcp open http nginx 1.18.0 (Ubuntu)
|_http-server-header: nginx/1.18.0 (Ubuntu)
|_http-title: Did not follow redirect to <http://nocturnal.htb/>
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
Service detection performed. Please report any incorrect results at <https://nmap.org/submit/> .
Nmap done: 1 IP address (1 host up) scanned in 29.00 seconds
Port 80
Directory search
Let’s create an account and look further into the website
Foothold/shell
After creating an account test:test we were redirected to dashboard, where we can see there is functionality to upload files is there
Upon trying to upload a text file, we get the error Invalid file type. pdf, doc, docx, xls, xlsx, odt are allowed.
We were able to upload the test.pdf file, we have seen /view.php endpoint on our dirsearch.
Let’s visit that endpoint,
look like we will need to modify the URL
On our upload page we found the link to our file http://nocturnal.htb/view.php?username=test&file=test.pdf
fuzzing username
If the user name is obtained through the URL , you can enumerate the users here.
We have found 3 users admin, amanda and tobias
It can be seen that these users have special echoes. When checking the files of amanda , we found a privacy.odt
priacy.odt
it is a document file
Let’s open and analyze the content
found amanda’s password
admin panel
we can login as amanda
and we can visit admin panel
On intercepting create backup request, we can see password and backup parameter.
Use %0a for line breaks and %09 for spaces to execute the command.
On trying bash commands in password parameter we were able to execute id command
shell as www-data
When trying to execute revshell i was getting errors
So i uploaded the revshell on the box and run it
shell as tobias
nocturnal_database.db.db
We found a DB file
Let’s copy this
There was a users table in the db, from which we get the hased passwords
found tobias password
And we are in as tobias, and we also found the user.txt
Privilege Escalation
port 8080
something is hosted internally on port 8080
Let’s start a new SSH with local port forwarding
Let’s login via admin: <toba password>
Found the version
CVE 2023-46818
On googling the exploit for ISPConfig 3.2 , we found CVE-2023-46818 and this exploit
and we are in as root
found root.txt
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