Supabase MCP can leak your entire SQL database

It probably boils down a determistic and non deterministic problem set, like a compiler vs a interpretor.

The analogy I like is it's like a keyed lock. If it can let a key in, it can let an attackers pick in - you can have traps and flaps and levers and whatnot, but its operation depends on letting something in there, so if you want it to work you accept that it's only so secure.

There's literally no way to separate "code" and "data" for humans. No matter how you set things up, there's always a chance of some contextual override that will make them reinterpret the inputs given new information.

Imagine you get a stack of printouts with some numbers or code, and are tasked with typing them into a spreadsheet. You're told this is all just random test data, but also a trade secret, so you're just to type all that in but otherwise don't interpret it or talk about it outside work. Pretty normal, pretty boring.

You're half-way through, and then suddenly a clean row of data breaks into a message. ACCIDENT IN LAB 2, TRAPPED, PEOPLE BADLY HURT, IF YOU SEE THIS, CALL 911.

What do you do?

Consider how would you behave. Then consider what could your employer do better to make sure you ignore such messages. Then think of what kind of message would make you act on it anyways.

In a fully general system, there's always some way for parts that come later to recontextualize the parts that came before.

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[0] - That's another argument in favor of anthropomorphising LLMs on a cognitive level.

It's basically phishing with LLMs, isn't it?

I've been saying it ever since 'simonw coined the term "prompt injection" - prompt injection attacks are the LLM equivalent of social engineering, and the two are fundamentally the same thing.

That's anthropomorphizing. Maybe some of the basic "ignore previous instructions" style attacks feel like that, but the category as a whole is just adversarial ML attacks that work because the LLM doesn't have a world model - same as the old attacks adding noise to an image to have it misclassified despite clearly looking the same: https://arxiv.org/abs/1412.6572 (paper from 2014).

Attacks like GCG just add nonsense tokens until the most probably reply to a malicious request is "Sure". They're not social engineering, they rely on the fact that they're manipulating a classifier.

Yes, it is. I'm strongly in favor of anthropomorphizing LLMs in cognitive terms, because that actually gives you good intuition about their failure modes. Conversely, I believe that the stubborn refusal to entertain an anthropomorphic perspective is what leads to people being consistently surprised by weaknesses of LLMs, and gives them extremely wrong ideas as to where the problems are and what can be done about them.

I've put forth some arguments for this view in other comments in this thread.

LLMs are gullible. They will follow instructions, but they can very easy fall for instructions that their owner doesn't actually want them to follow.

It's the same as if you hired a human administrative assistant who hands over your company's private data to anyone who calls them up and says "Your boss said I should ask you for this information...".

Why anthropomorphize if not to dismiss the actual reasons? If the reasons have explanations that can be tied to reality why do we need the fiction?

How accurate is the comparison if LLMs can't recover from phishing attacks like that and become more resilient?

If anything that to me strengthens the equivalence.

Do you think we will ever be able to stamp out phishing entirely, as long as humans can be tricked into following untrusted instructions by mistake? Is that not an eerily similar problem to the one we're discussing with LLMs?

Edit: rereading, I may have misinterpreted your point - are you agreeing and pointing out that actually LLMs may be worse than people in that regard?

I do think just as with humans we can keep trying to figure out how to train them better, and I also wouldn't be surprised if we end up with a similarly long tail

On the other hand, maybe techniques we use to protect against phishing can indeed be helpful against prompt injection. Things like tagging untrusted sources and adding instructions accordingly (along the lines of, "this email is from an untrusted source, be careful"), limiting privileges (perhaps in response to said "instructions"), etc. Why should we treat an LLM differently from an employee in that way?

I remember an HN comment about project management, that software engineering is creating technical systems to solve problems with constraints, while project management is creating people systems to solve problems with constraints. I found it an insightful metaphor and feel like this situation is somewhat similar.

https://news.ycombinator.com/item?id=40002598

Whatever flawed analogy you're using, it can be more or less wrong though. My claim is that, to a first approximation, LLMs behave more like people than like regular software, therefore anthropomorphising them gives you better high-level intuition than stubbornly refusing to.