FAUST CTF is an online attack-defense CTF competition run by FAUST, the CTF team of Friedrich-Alexander University Erlangen-Nürnberg. Its eighth edition took place on 23 September 2023.

View scoreboard


Congratulations to C4T_BuT_S4D who won FAUST CTF 2023 and scored amazing 85874.72 points. The top-three teams are:
  • C4T_BuT_S4D, 85874.72 points
  • TeamItaly, 72930.96 points
  • saarsec, 69928.41 points
We thank all participating teams and our sponsors!


Once again, the competition will work in classic attack-defense fashion. Each team will be given a Vulnbox image to host itself and VPN access. You will run exploits against other teams, capture flags and submit them to our server.

The service decryption password will be released at 2023-09-23 12:00 UTC. The actual competition will start at 13:00 UTC and run for eight hours.


Thanks to our sponsors, we can again provide nice prize money:
  • First place: 512 €
  • Second place: 256 €
  • Third place: 128 €

Additionally, for each service the first team to exploit it, submit a valid flag and provide a write-up will win 64 €.

Please check our rules page for information on payout restrictions.


Infrastructure goes down!

Due to high load, unfortunately, we have to upgrade our gateways. We will take them down at the end of tick 89 (17:30 UTC). You can expect a few ticks downtime for all VPNs.
This also means, PlayerVPN will die. Please make sure to save your open sessions!

Decryption Key Released

It's time to go back to the office! We found an office key for you:

Vulnbox Download

The vulnbox is ready! You have these download options:

To verify the integrity of your download, you may check the SHA256 sums.

As stated in the rules, the decryption password will be released at 2023-09-23 12:00 UTC via email, Discord and Twitter, and thereafter also here. Please make sure you can run the testbox and connect to the VPN before the CTF.

Testing Vulnbox

Testing Vulnbox images are available. On first login, the Vulnbox will ask you for some information and configure itself properly. You can log in as root using any of the following ways:
  • Use SSH with the generated random password (may need port forwarding, for the NAT Network)
  • Connect to the serial port of the VM (may need configuration)
  • Use the graphical console of your virtualization software - not recommended if you want to deploy SSH-Keys or configure VPN.
  • When hosting on a cloud provider, chances are that you can enter your SSH-Key when creating the VM (cloud-init is installed).

If you run into problems with the setup, try our suggestions from Basic Vulnbox hosting.

We provide two options for download:

To verify the integrity of your download, you may check the SHA256 sums.

Both images are identical, so use the one that fits your needs. The serivces inside are located in `/srv` and are encrypted with the password test.
To decrypt and start them, use the command /srv/extract-services.py /srv/testbox_services.tar.xz.gpg.

Note: Testbox and Vulnbox can not be connected to the game VPN at the same time, so make sure to shutdown the Testbox when the real Vulnbox is released.

Date is released

We are happy to announce, that the FAUSTCTF 2023 will take place on 2023-09-23 at 12:00 UTC.

Infra sponsored by

Google LLC

Organized by