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🤠Lampiao

Would you like to keep hacking in your own lab? Try this brand new vulnerable machine! Get root!

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1. Reconnaissance

Scanning the network to find vulnerable machine's IP

sudo arp-scan -l
Interface: eth0, type: EN10MB, MAC: 08:00:27:bb:5e:c1, IPv4: 192.168.10.17
Starting arp-scan 1.9.7 with 256 hosts (https://github.com/royhills/arp-scan)
192.168.10.1	52:54:00:12:35:00	QEMU
192.168.10.2	52:54:00:12:35:00	QEMU
192.168.10.3	08:00:27:4f:a3:78	PCS Systemtechnik GmbH
192.168.10.15	08:00:27:cb:94:c3	PCS Systemtechnik GmbH

  • We find the IP of the vulnerable machine to be 192.168.10.15

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2. Scanning

  • Using nmap to find the open ports and their services

sudo nmap -Pn -sV -O -p- 192.168.10.15
Starting Nmap 7.92 ( https://nmap.org ) at 2022-03-23 10:10 EDT
Nmap scan report for 192.168.10.15
Host is up (0.0016s latency).
Not shown: 65532 closed tcp ports (reset)
PORT     STATE SERVICE VERSION
22/tcp   open  ssh     OpenSSH 6.6.1p1 Ubuntu 2ubuntu2.7 (Ubuntu Linux; protocol 2.0)
80/tcp   open  http?
1898/tcp open  http    Apache httpd 2.4.7 ((Ubuntu))
MAC Address: 08:00:27:CB:94:C3 (Oracle VirtualBox virtual NIC)
Device type: general purpose
Running: Linux 3.X|4.X
OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4
OS details: Linux 3.2 - 4.9
Network Distance: 1 hop
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 79.44 seconds

  • We find 3 open ports, tcp ports 22, 80 and 1898 with a ssh and two web servers running respectively

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3. Initial Foothold

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3.1 Port 80

  • Nothing of interest here

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3.2 Port 1898

  • We see a static website running on Drupal CMS

  • We find two potential usernames tiago and eder from this site. Adding this to user.txt

  • Using cewl to get all the words from the website to a list called pass.txt for brute forcing

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3.3 Brute forcing ssh login

  • Using hydra to try and brute force ssh login credentials with the created user.txt and pass.txt

We get the credentials tiago : Virgulino

  • Connecting as user tiago via ssh

  • tiago does not have any sudo vectors.

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4. Privilege Escalation

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4.1 Linux exploit suggester

  • Hosting a python server in the directory of the downloaded script

  • Pulling the script from the attacker machine to the target machine in the /tmp directory as this directory provides read, write and execute permission for all the users

  • Executing the script

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4.2 DirtyCow2

  • Use exploit dirtycow2 and downloading it to the attacker machine from ext-url: https://www.exploit-db.com/download/40847

  • Hosting a python server in the downloaded directory and pulling the file from the target machine

  • Looking at the source code, the developer has specified the commands for executing their script in EDB-Note section

  • We are root. Moving into the /root directory, we get the flag

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