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Claude Code Found a Linux Vulnerability Hidden for 23 Years

mtlynch.io

211–220 of 303 posts

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#211

Earlier quoted context omitted.

> Pasting a big batch of new code and asking Claude "what have I forgotten? Where are the bugs?" It's actually the main way I use CC/codex.

I find Codex sufficiently better for it that I’ve taught Claude how to shell out to it for code reviews

Yeah and it comes with the blood of children included

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#212
post #210
post #203

Earlier quoted context omitted.

Thank you for your kind comment. I recommend you watch the actual talk, and then understand what exploiting RCEs in things like the Linux kernel at such a scale that defenders can no longer keep up with actually means. The latter is their claim, not mine. Also realize that, unlike a security researcher, an attacker doesn't necessarily need to review the model out carefully to filter out the slop before a bug submissi…

Is your pitch that the reports are slop? Or that they’re so dangerous it’s morally indefensible to share the research?

A good chunk of the reports are false positives (slop) per the researcher's own admission in his talk. I have no issue sharing the bug reports either; the bugs are better fixed.

What I take issue with is that they have basically released the weapon first without thinking about the consequences. And again, if you watch the talk, you'll see how he literally calls others to action to fix the problem. They made a problem and are asking you to fix it, and it will also cost you money, which conveniently goes to them. Any industry with even a semblance of regulation would find this very disturbing.

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#213
post #181

Earlier quoted context omitted.

I'm tickled at the idea of asking antirez [1] if he's ever written a PoC for a CVE. [1] https://en.wikipedia.org/wiki/Salvatore_Sanfilippo

I actually like when that happens. Like when people "correct" me about how reddit works. I appreciate that we still focus on the content and not who is saying it.

That's not really what happened on this thread. Someone said something sensible and banal about vulnerability research, then someone else said do-you-even-lift-bro, and got shown up.

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#214

Earlier quoted context omitted.

This is a bit unfair. Hackers are born every day.

Bots too, vanderBOT!

I used to work in robotics, and can't remember the password for my usual username so I pulled this one out of thin air years ago

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#215
post #54

I'm interested in the implications for the open source movement, specifically about security concerns. Anyone know is there has been a study about how well Claude Code works on closed source (but decompiled) source?

I’ve had Claude Code diagnose bugs in a compiler we wrote together by using gdb and objdump to examine binaries it produces. We don’t have DWARF support yet so it is just examining the binary. That’s not security work, but it’s adjacent to the sorts of skills you’re talking about. The binaries are way smaller than real programs, though.

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#216

Earlier quoted context omitted.

Tokens aren't more expensive than highly trained meatbags today . There's no way they'll be more expensive "tomorrow"...

[flagged]

the crash would mean price of GPUs would go down, not up...

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#217
post #181

Earlier quoted context omitted.

I'm tickled at the idea of asking antirez [1] if he's ever written a PoC for a CVE. [1] https://en.wikipedia.org/wiki/Salvatore_Sanfilippo

Sure he wrote a port scanner that obscures the IP address of the scanner, but does he know anything about security? /s Oh, and he wrote Redis. No biggie.

That's both wholly different branches than finding software bugs

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#218

Earlier quoted context omitted.

Static/Dynamic analysis tools find vulnerabilities all the time. Almost all projects of a certain size have a large backlog of known issues from these boring scanners. The issue is sorting through them all and triaging them. There's too many issues to fix and figuring out which are exploitable and actually damaging, given mitigations, is time consuming. Am i impressed claude found an old bug? Sort of.. everytime a ne…

Static analyzers find large numbers of hypothetical bugs, of which only a small subset are actionable, and the work to resolve which are actionable and which are e.g. "a memcpy into an 8 byte buffer whose input was previously clamped to 8 bytes or less" is so high that analyzers have little impact at scale. I don't know off the top of my head many vulnerability researchers who take pure static analysis tools seriousl…

There are plenty of static analyzers do attempt to walk code paths for reachability. Some even track tainted input. And yes, these are often good starting points for developing exploits. I’ve done this myself.

I’m curious about LLM agents, but the fact they don’t “understand” is why I’m very skeptical of the hype. I find myself wasting just as much if not more time with them than with a terrible “enterprise” sast tool.

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#219
post #135

Earlier quoted context omitted.

A powertool that needs discretion and good judgement to be used well is being restricted to people with a track record of displaying good judgement. I see nothing wrong here. AI enables volume, which is a problem. But it is also a useful tool. Does it increase review burden? Yes. Is it excessively wasteful energy wise? Yes. Should we avoid it? Probably no. We have to be pragmatic, and learn to use the tools responsib…

I never said anything is wrong with the policy. Or with the tool use for that matter. This whole chain was one person saying “AI is creating such a burden that projects are having to ban it”, someone else being willfully obtuse and saying “nuh uh, they’re actually still letting a very restricted set of people use it”, and now an increasingly tangential series of comments.

I feel like you're still failing to grasp the point.

The only difference is that before AI the number of low effort PRs was limited by the number of people who are both lazy and know enough programming, which is a small set because a person is very unlikely to be both.

Now it's limited to people who are lazy and can run ollama with a 5M model, which is a much larger set.

It's not an AI code problem by itself. AI can make good enough code.

It's a denial of service by the lazy against the reviewers, which is a very very different problem.

Re: Claude Code Found a Linux Vulnerability Hidden for 23 Years

#220

Earlier quoted context omitted.

From your link: > Non-commercial use only. You agree that you will not use our Services for any commercial or business purposes and we and our Providers have no liability to you for any loss of profit, loss of business, business interruption, or loss of business opportunity. There are separate commercial terms for Team/Enterprise/API usage: https://www.anthropic.com/legal/commercial-terms

I suspect you are accessing their website from a European IP address. The clause you quoted is not present for users outside of the EU/UK. https://news.ycombinator.com/item?id=47590473

That explains it. I don’t see it from my US IP address.
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