Boardlight

Table of Contents

MACHINE INFO
#

Boardlight is an easy Linux machine on HTB which involves initial enumeration of web services, exploiting a known vulnerability in Dolibarr, and escalating privileges through an exploit targeting Enlightenment desktop.

ENUMERATION
#

Nmap scan of target

p0s3id0n@kali:~/Machines/htb/labs$ sudo nmap -sCV -T4 -vv 10.10.11.11
[sudo] password for p0s3id0n: 
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-06-11 12:40 EDT
<---snip--->
Completed Ping Scan at 12:40, 0.19s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 12:40
Completed Parallel DNS resolution of 1 host. at 12:40, 0.02s elapsed
Initiating SYN Stealth Scan at 12:40
Scanning 10.10.11.11 [1000 ports]
Discovered open port 80/tcp on 10.10.11.11
Discovered open port 22/tcp on 10.10.11.11
Discovered open port 3333/tcp on 10.10.11.11
Completed SYN Stealth Scan at 12:40, 3.08s elapsed (1000 total ports)
Initiating Service scan at 12:40
Scanning 3 services on 10.10.11.11
Completed Service scan at 12:40, 7.22s elapsed (3 services on 1 host)
<---snip--->
Nmap scan report for 10.10.11.11
Host is up, received echo-reply ttl 63 (0.37s latency).
Scanned at 2024-06-11 12:40:44 EDT for 23s
Not shown: 997 closed tcp ports (reset)
PORT     STATE SERVICE    REASON         VERSION
22/tcp   open  ssh        syn-ack ttl 63 OpenSSH 8.2p1 Ubuntu 4ubuntu0.11 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   3072 06:2d:3b:85:10:59:ff:73:66:27:7f:0e:ae:03:ea:f4 (RSA)
| ssh-rsa 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
|   256 59:03:dc:52:87:3a:35:99:34:44:74:33:78:31:35:fb (ECDSA)
| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBK7G5PgPkbp1awVqM5uOpMJ/xVrNirmwIT21bMG/+jihUY8rOXxSbidRfC9KgvSDC4flMsPZUrWziSuBDJAra5g=
|   256 ab:13:38:e4:3e:e0:24:b4:69:38:a9:63:82:38:dd:f4 (ED25519)
|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILHj/lr3X40pR3k9+uYJk4oSjdULCK0DlOxbiL66ZRWg
80/tcp   open  http       syn-ack ttl 63 Apache httpd 2.4.41 ((Ubuntu))
|_http-title: Site doesn't have a title (text/html; charset=UTF-8).
| http-methods: 
|_  Supported Methods: GET HEAD POST OPTIONS
|_http-server-header: Apache/2.4.41 (Ubuntu)
3333/tcp open  tcpwrapped syn-ack ttl 63
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

<---snip--->
Read data files from: /usr/bin/../share/nmap
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 23.28 seconds
           Raw packets sent: 1120 (49.256KB) | Rcvd: 1120 (44.800KB)

Open ports from namp scan: 22, 80, 3333

PORT 80 ENUMERATION
#

I tried to post content on the submit a comment section of the website but that led to nowhere. So I proceeded to bruteforce for hidden directories using gobuster.

p0s3id0n@kali:~/Machines/htb/labs$ gobuster dir -u http://10.10.11.11/ -w /usr/share/wordlists/dirb/common.txt             
===============================================================
Gobuster v3.6
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)
===============================================================
[+] Url:                     http://10.10.11.11/
[+] Method:                  GET
[+] Threads:                 10
[+] Wordlist:                /usr/share/wordlists/dirb/common.txt
[+] Negative Status codes:   404
[+] User Agent:              gobuster/3.6
[+] Timeout:                 10s
===============================================================
Starting gobuster in directory enumeration mode
===============================================================
/.hta                 (Status: 403) [Size: 276]
/.htaccess            (Status: 403) [Size: 276]
/.htpasswd            (Status: 403) [Size: 276]
/css                  (Status: 301) [Size: 308] [--> http://10.10.11.11/css/]
/images               (Status: 301) [Size: 311] [--> http://10.10.11.11/images/]
/index.php            (Status: 200) [Size: 15949]
/js                   (Status: 301) [Size: 307] [--> http://10.10.11.11/js/]
/server-status        (Status: 403) [Size: 276]
Progress: 4614 / 4615 (99.98%)
===============================================================
Finished
===============================================================

Several directory bruteforcing attempts with different parameters still gave me the same output, so I had to result to other sources on how to proceed from here.

From the official HTB forums page on the machine, there were several comments about a comment on the page source with interesting information. I totally forgot to check the page source.

I found the following and when I tried to access the suppossed file directory, I got the error below.

Once more I was stuck, further research gave me an idea on fuzzing for subdomains.

p0s3id0n@kali:~/Downloads$ ffuf -w /usr/share/wordlists/seclists/Discovery/DNS/subdomains-top1million-5000.txt -u http://board.htb/ -H "Host: FUZZ.board.htb" -fs 15949

        /'___\  /'___\           /'___\       
       /\ \__/ /\ \__/  __  __  /\ \__/       
       \ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\      
        \ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/      
         \ \_\   \ \_\  \ \____/  \ \_\       
          \/_/    \/_/   \/___/    \/_/       

       v2.1.0-dev
________________________________________________

 :: Method           : GET
 :: URL              : http://board.htb/
 :: Wordlist         : FUZZ: /usr/share/wordlists/seclists/Discovery/DNS/subdomains-top1million-5000.txt
 :: Header           : Host: FUZZ.board.htb
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200-299,301,302,307,401,403,405,500
 :: Filter           : Response size: 15949
________________________________________________

crm                     [Status: 200, Size: 6360, Words: 397, Lines: 150, Duration: 238ms]
:: Progress: [4989/4989] :: Job [1/1] :: 174 req/sec :: Duration: [0:00:39] :: Errors: 0 ::

EXPLOITATION
#

Used default creds admin:admin

Post-login:

From the login page, I noted the dollibar version and did a google search on possible exploits. I found the following exploit: https://github.com/nikn0laty/Exploit-for-Dolibarr-17.0.0-CVE-2023-30253.git

I got a successful shell!!

As is the norm, the user.txt flag is typically stored in the home directory but I couldn’t access the directory of the user larissa.

After doing some research online, I got the idea of cheking the Dolibar configuration file for possible passwords stored.

dolibarrowner: serverfun2$2023!! Since I had only seen one user larissa, I tried using ssh to login as larissa using the password provided.

It worked!!User flag pwned!!

PRIVILEGE ESCALATION
#

Now onto privilege escalation. I uploaded linpeas to the ssh session

I found some interesting output:

SUID (Set User ID) binaries are executable files in Unix-like operating systems that run with the permissions of the file owner, rather than the user who executes them.