The RCE that AMD wouldn't fix

> Final update: A couple of days before the embargo ended (and after I wrote the majority of this blog post), AMD told me what their patch for this vulnerability is [...] Although it is true that they now fully use HTTPS, the claim about signature verification is untrue; they only perform a CRC-32 check on the downloaded executable, which is not cryptographically secure.

So solves the MITM, but massive infection is still trivial if someone compromises the webserver.

It's ridiculous to consider MITM attacks out of scope for taking over your computer. Also, there are probably ways to exploit this without a true MITM like DNS cache poisoning. But it's best to just assume the whole internet is MITMed.

AMD's inability to make good software has been a recurring problem for decades. Many years ago I had some success with their optimising compiler, but everything else I've touched was bad. A real pity.

The "signature verification" in the fix being CRC32 is pretty hilariously clueless.

previously https://news.ycombinator.com/item?id=46906947

> In my frustration, I decided to punish this software

Love this. I am frustrated by idiot software features everywhere, but am not triggered yet to punish them. AI automation is coming close however.

Thank you for looking into this, I also have the annoying pop-up and have been suspicious of it…

There's two requests involved for the auto updater, one to grab the XML file, and one to grab the driver file over plain http.

If the autoupdater can't handle the redirection when grabbing the XML file, then it's a case of accidental safety by mistake that would prevent grabbing the plain http file.

AMD's utter incompetence when it comes to the software side of things is truly, truly baffling to me. It's not like you need a mountain of developers, a team or two on the right project would do wonders for their market share.

For example: Implement the CUDA. CUDA's won, hands down, that toothpaste is solidly outside the tube. Luckily, to the outside observer CUDA is just an API, and API's aren't copyrightable. Literally nothing is stopping AMD from hiring a relatively small team of developers to make AMD GPUs CUDA-compatible.

> If you are an AMD user...

Don't bother to use Windows?

Perhaps they're concerned that you're simultaneously a 'security professional' and online harasser/doxxer? https://www.youtube.com/watch?v=YRI4Dshn0CE&t=3114s

Congratulations, you found the government backdoor!

I think we can all agree that MiTM is a valid attack vector and this should have paid out the bounty. AMD won't do it, but perhaps we can crowdsource it - the dude deserves it. Join me in doing this: https://ko-fi.com/mrbruhh (identical link to the one in the write up, feel free to verify).

I started it with $100 - https://ko-fi.com/transactions/03df753c-09b0-4972-8e53-adf06...

AMD software is often utter trash.

I am a diehard fanboy of their GPUs, and have been since they were still ATI but I had to finally purchase an nvidia GPU because of how bad AMDs software quality is.

My powerful 5700XT spent two years basically broken, because the default, driver provided fan curve locked the fan at 27%. For two years, I couldn't figure out why my GPU constantly crashed, because it was overheating, because the default fan curve prevented the GPU from keeping itself cool and it would eventually just give up.

That diagnoses was complicated by the fact that AMD GPUs just resetting is very common. There's a watchdog timer in Windows that resets parts of the GPU stack because Microsoft is traumatized by 60% of Windows Vista BSODs being caused by bad nvidia drivers. Apparently sometimes if you increase this watchdog timer, the GPU eventually finishes whatever was giving it trouble.

But I still love AMD, and the ryzen line is a great value in the mid range. So I bought another AMD CPU and am very happy with it. But it somehow included software and this specific auto updater utility. Which I don't need, since I don't want to update the drivers for a GPU that I shouldn't be using (maybe except some video encoding lift, but my GPU can do that too). But I could not figure out a way to kill or prevent this stupid little autoupdater utility which always steals focus, for no reason at all. It shouldn't even be popping up a CLI! Windows task scheduling is incredible and would do this without a problem, and give you all the infrastructure to notice this was happening!

Seems like white hat work is pretty fruitless nowadays. Disappointing.