Profile for joern
- Display name
- joernchen
- Username
- @joern@threatactor.club
- Role
- admin
About joern
Fields
- Website
- https://0day.click
- Threema
- https://threema.id/K8J68WTX
Bio
Your mom's favorite hacker!
My other account is @joernchen
- Joined
- Posts
- 686
- Followed by
- 1129
- Following
- 261
Stats
Recent public posts
exclude boosts
Teaser for my @bsidesfra presentation next week:
LLMs are kinda "cute" they create files like fix_final_perfect.go and then the code fails of course.
Vielleicht wäre ein Blick in https://www.berlin.de/.well-known/security.txt und eine Nachricht nicht schlecht gewesen, statt hier shitposting zu machen.
Das diese offizielle Verschleierungstaktik nicht hilfreich ist, haben wohl alle gemerkt. Nachgeordnete Einrichtungen sind davon leider genau so betroffen, wie der Rest der Bevölkerung.
Wie auch immer. Da es jetzt kurz vor Freitag um Eins ist, ist das jetzt gesperrt.
I don’t find the bugs - the bugs find me!
Let’s call it „beg4shell“. At least now everyone can be a vulnerability researcher.
Save this for emergency.
Sooo Leute was sind denn eure Boomermeinungen zu https://www.langenscheidt.com/jugendwort-des-jahres bitte?
The short messages from aircraft (via ACARS) are all unencrypted.
That's right, they're sent in plane text.
Forget wordle:
joernchen scored 0.06 which is amazing!
★★★★★
I've played 5 days in a row
https://beatmatch.pro/
reverse engineering implies the existence of engineering
Firefox Networking team is looking for a student worker in Germany. Needs to be enrolled in a university. 20/hr per week. Great team! https://www.mozilla.org/en-US/careers/position/gh/8068406/
Random 16 yo YouTube video recommendation did not disappoint lol
Send memes my way please!
BALKONKRAFTWERK
Niemand: ...
Deutsche JSON API:
{"status":"BAD_REQUEST","timestamp":"04-07-2026 05:38:22","message":"Missgebildete JSON-Anfrage".....
Oh more #fedijobs at Mozilla
Senior Security Engineer (Add-ons) (https://www.mozilla.org/en-US/careers/position/gh/7583571/). This involves building code-review / malware detection pipelines for addons.mozilla.org - really cool team. The same team is also looking for an engineer to implement extension APIs within Firefox, a Senior Platform Engineer (https://www.mozilla.org/en-US/careers/position/gh/7921750/).
Reminder we're active looking for candidates from diverse backgrounds and with perspectives different from our own. Questions? Just ask me :)
Re: https://infosec.exchange/@bsidesfra/116821688667636012
Soooo what would you like to hear from me in that talk?
Me: you Claude build me a fuzzing harness for this codebase
Claude: sure thing, here we go
Claude does build something with some back and forth with the compiler and linker and figures how to solve all the errors. 
Claude: Now let me do a clean build….
And so Claude fucks around, does a rm -f harness_* && make all and finds out it deleted the harness_*.c files as well.
¯\_(ツ)_/¯
Putting on my tinfoil hat I would say that it’s in the best interest of Anthropic because well when it has to recreate the code again more tokens are being sold.
Yeah, so… @joern is doing the keynote.
Just some random guy who’s been in the hacker scene for decades. Nothing special. Get ready for a totally average talk!
Later today (17:00 CEST) I’ll do a public talk on browser security, hosted by calif.io. Livestream: https://youtube.com/live/iZE_iHcv7_0?feature=share There will also be a recording :)