Notifications

CTF is over!

Hi everyone,

and with the strike of the bell we're closing this years Nullcon Berlin CTF. We hope you enjoyed playing, congratulations to everyone participating.

The results will be uploaded to ctftime later, please participate in the score voting once that is done.

We also appreciate event feedback on https://forms.gle/yRintKKrbsZe2uAk6

If you're eligible for prices please publish your writeups until next Sunday (2025-09-14), otherwise we will reach out to lower ranked teams.

If you're on-site we're happy to chat with you about the challenges, everyone else - enjoy discussions on discord.

We'll keep the challenges running for a while, but without active monitoring.

Thanks for joining the event and see you at next years' Nulllcon CTFs,

the ENOFLAG team

[On-Site only] - Firmware Hacking Village challenges available

Test your skill on some hardware challenges at our friends from the Firmware Hacking Village upstairs. Pay them a visit, solve the challenge and get the flags.

Support is back

Conference is on again - and so are we. Happy hacking for the remaining time.

Hints on Narrow DES

We added two new hints in the description of Narrow DES.

Limited Support outside of conference hours

As the conference is over for the day the support will be limited. The challenges will continue running over night and we might take a peek at discord, but don't expect quik replies. We will be back tomorrow morning when the conference is opening it's doors again.

gorevgohome: new hint available

Find the docker command to excute it easily

pwgen source

For pwgen you get the source by appending /?source. It now also tells you so on the page.

Fotispy4: Challenge Update

The provided libc in Fotispy4 had the wrong version. the new libc is now available

webby: if everyone could please stop trying to brute force the service that would be great.

Seriously, it's not necessary and we'd hate to block you from accessing the network.

hidden_strings flag clarification added

If you think you solved hidden_strings but are struggling with the submission - check the note we just added.

Welcome to nullcon HackIM CTF Berlin 2025!

Public Service Anouncement: Welcome to nullcon HackIM CTF Berlin 2025!

Have fun with our challenges.

Please keep in mind that you need to solve the Null Sanity challenge to be eligible for the prizes. For all onsite players: Say hi to us and receive a special flag for the onsite prizes.

See you soon. Happy hacking!!!!