alt.hn

5/23/2025 at 7:12:33 AM

Remote Prompt Injection in Gitlab Duo Leads to Source Code Theft

 https://www.legitsecurity.com/blog/remote-prompt-injection-in-gitlab-duo

by chillax

5/23/2025 at 10:35:34 AM

Until prompt injection is fixed, if it is ever, I am not plugging LLMs into anything. MCPs, IDEs, agents, forget it. I will stick with a simple prompt box when I have a question and do whatever with its output by hand after reading it.

by cedws

5/23/2025 at 11:34:24 AM

I would have the same caution, if my code was any special.

But the reality is I'm very well compensated to summon CRUD slop out of thin air. It's well tested though.

I wish good luck to those who steal my code.

by hu3

5/23/2025 at 3:15:22 PM

You say code as if the intellectual property is the thing an attacker is after, but my experience has been that folks often put all kinds of secrets in code thinking that the "private repo" is a strong enough security boundary

I absolutely am not implying you are one of them, merely that the risk is not the same for all slop crud apps universally

by mdaniel

5/23/2025 at 5:56:08 PM

Great work!

Data leakage via untrusted third party servers (especially via image rendering) is one of the most common AI Appsec issues and it's concerning that big vendors do not catch these before shipping.

I built the ASCII Smuggler mentioned in the post and documented the image exfiltration vector on my blog as well in past with 10+ findings across vendors.

GitHub Copilot Chat had a very similar bug last year.

by wunderwuzzi23

5/23/2025 at 3:12:45 PM

Running Duo as a system user was crazypants and I'm sad that GitLab fell into that trap. They already have personal access tokens so even if they had to silently create one just for use with Duo that would be a marked improvement over giving an LLM read access to every repo in the platform

by mdaniel

5/23/2025 at 10:03:39 AM

GitLab's remediation seems a bit sketchy at best.

by nusl

5/23/2025 at 10:16:38 AM

The whole "let's put LLMs everywhere" thing is sketchy at best.

by reddalo