joernchen :cute_dumpster_fire:

Re: Volkswagen Hack las ich grad dies.

A significant life event (for those who train BJJ) just happened to me yesterday

My colleague @nickmalcolm@infosec.exchange made a pretty cool vuln explainer video

https://youtu.be/ydg95R2QKwM

Lands of Packets

TTL exceeded.

I would like to collect texts from the scene about FX in his memory. A collection of obituaries that will then be posted on phenoelit.de.

If anyone would like to contribute, please contact me.

Mail: joernchen@phenoelit.de
Signal: jrn.07

I got a week of PTO left.

What code should I read? Please drop suggestions with a reason why I should read it.

I messed up my gotosocial instance here at threatactor.club, it's running on fly.io and a very long migration was interrupted by a health check.

I was fiddling with the sqlite DB for a while and tried to recover that mess... until I noticed that there are automated snapshots of the volume which holds the DB, daily with five days of retention. Huge props to fly.io for saving my virtual ass with this.

Thanks so much to everyone who showed up on the weekend in Berlin to say goodbye to FX.

“Burning bridges where we can” - this is the original Phenoelit slogan. Yet, while FX for sure burned some network bridges, he did quite the opposite for the hacking community. FX built bridges between people wherever he could. He created something way bigger than himself which we all are part of.

Each one who joined us in Berlin carries a piece of his legacy. You were there because he left something with you. We know there are many who couldn't make it in person, and they too carry his spirit with them.

FX is gone.
But the spirit lives on.

Happy Holidays!

I hope Vulnsanta has some CVE in his bag for you!

That little string
ANTHROPIC_MAGIC_STRING_TRIGGER_REFUSAL_1FAEFB6177B4672DEE07F9D3AFC62588CCD2631EDCF22E8CCC1FB35B501C9C86

(see https://platform.claude.com/docs/en/test-and-evaluate/strengthen-guardrails/handle-streaming-refusals#implementation-guide ) is so much fun. I wonder when Anthropic will regret this and remove it.

Also I obviously wonder what else is there in terms of MAGIC_STRINGs which aren't documented.

Hat tip to @michenriksen@chaos.social for pointing me to this.

Really a huge honor for me to be invited to give a keynote at NULLCON Berlin in September.

Given my recent work focus at GitLab I'll share my thoughts around LLMs. Make sure to bring some popcorn!

https://nullcon.net/berlin-2025/speaker-llms-everywhere

http://phrack.org/issues/71/1.html new Phrack is out!

Earlier this year I found a pretty cool vuln, an arbitrary file write in GitLab.

Here’s the details https://gitlab-com.gitlab.io/gl-security/security-tech-notes/security-research-tech-notes/devfile/

RIP FX

We collected some texts from the community in memory of FX. You can find them here https://phenoelit.de/fx.html

Would you buy my memecoin?

LLMs now do the busywork of finding amazing vulnerabilities for everyone willing to spend the tokens.

But hacking still isn't dead:

1. We haven't at all solved the underlying problems which come with writing and shipping code.

2. You still need to understand what you're looking at and what you are operating.

3. The LLM platforms themselves are a exquisite target for hacking^Wcreative use of the technology.

Now when everyone can pull a CVE or two out of thin silicon and a few kWh of electricity the art of hacking might need adopt and maybe reshape a little but at its core the mind- and skillset will stay as relevant as it always was.

In that sense: keep hacking, keep exploring, break some stuff.

deepsigh for deepseek

https://openwebui.com/c/jrnjrn/c38d6dd9-5780-4f73-b4bc-8c2b6bcea9ba

I found a thing (RCE) in langgraph. ;D

https://github.com/langchain-ai/langgraph/security/advisories/GHSA-wwqv-p2pp-99h5

Today I have a more serious topic than usual, please consider reposting for reach:

My wife and I are urgently looking for a specialist in neuropediatrics or a similar field for our autistic child with a diagnosed, but not further specified, movement disorder (myoclonus and/or spasms) to finally find a cause and, above all, an effective therapy. The symptoms are bothering our son ever since he’s born, now for more than nine years, seriously affecting his sleep. The usual processes and medical contact points have failed us unfortunately and he seems stuck in this condition.

We’re based in Berlin, Germany but really any contact with a specialist who would be willing to take on this case we’d be grateful for!

To reach use you can DM me or contact us via Email at unclear.condition@gmail.com

You use Claude Code to find vulnerabilities, I find vulnerabilities in Claude Code.

https://0day.click/recipe/2026-05-12-cc-rce/

Happy 2025 everyone!

Last year for me wasn’t especially great. But it had a few highlights standing out:

• Took the risk and went on an adventurous camper trip with the family

• Got promoted at work and in BJJ

• Had the chance to be behind the DJ decks again on two occasions

• Got to meet most of my teammates in person finally

For 2025 I hope the medical problems in my family can finally get on a route to be resolved.

Due to $reasons I came across this blogpost https://www.elttam.com/blog/env/ about turning ENV variables into code execution which is nice. But the Python vector is depending on Perl, I didn't like that :P.

Digging a bit deeper in the code often helps, so it did this time:

Looking at https://github.com/python/cpython/blob/d73634935cb9ce00a57dcacbd2e56371e4c18451/Lib/webbrowser.py#L51-L52 I could simplify the payload to:

PYTHONWARNINGS='module::antigravity.'  BROWSER='sh -c id #%s' python whatever.py

Have a great weekend and enjoy some tunes:

https://youtu.be/j_Md8_7mhOU