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Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

bugs.chromium.org

611–620 of 1001 posts

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#611

Earlier quoted context omitted.

Just deleted my LastPass account - have been converted to KeePass for over a month.

Did Lastpass use Cloudflare? That would be a disaster.

It does not appear that LP was using Cloudflare. Even if they were, at most, your master password is all that leaked. All of their encryption and decryption is done on the client.

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#613

Earlier quoted context omitted.

The point of bug bounties isn't to attract the interest of people who are working to find bugs . It's to make sure that if someone is finding bugs for fun or stumbles over bugs by accident , it's worth their time to report the bugs.

>> top-tier reward of a t-shirt. A t-shirt still seems entirely too small; closer to insulting than motivating.

Sure. I was talking about the general purpose of bug bounties, not the specific value.

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#616

Chrome marking Cloudflare HTTPS as "Secure" must be turned into something different, like "Not So Secure" or whatever. Secure = end to end. Cloudflare is MitM by design. Chrome and others must not tolerate it. This vulnerability is just another reason to do it asap.

So is any CDN.

Forgot about that, thanks. However we can use "integrity" attribute

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#617

Earlier quoted context omitted.

That's because HTTPS allows that. Whether it's cloudflare, or your own servers and load balancers, it's all legal. So it would be unfair to single cloudflare out. You could take some measures to identify their flexible-ssl traffic, and that's a grey area, but their regular ssl is fine. If it weren't for them, you would roll your own solution, which wouldn't be very different.

Ultimately I believe CF is sustaining its business by filling a gap in the Internet, namely DDoS protection. Until somehow the gap is closed we will see CF-like services continue to be popular even after this incident.

So there is no cheap in-house solution to DDoS but CF?

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#618
post #366

Earlier quoted context omitted.

That's terrifying. Thanks to Uber now requiring location services on Always instead of just when hailing a car, my and others' personal location history even outside of Uber usage could have been compromised. Sweet.

To be fair, you were kind of a fool if you actually let Uber have your location at all times. As soon as they announced that I blocked Uber from my location. I only allow it when I take an Uber (which is almost never now).

Not a fool but ...

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#619
post #4

Oh, my god. Read the whole event log. If you were behind Cloudflare and it was proxying sensitive data (the contents of HTTP POSTs, &c), they've potentially been spraying it into caches all across the Internet; it was so bad that Tavis found it by accident just looking through Google search results. The crazy thing here is that the Project Zero people were joking last night about a disclosure that was going to keep e…

If anyone here is HIPAA-regulated or you have a customer who is, and you used Cloudflare during those dates, it is Big Red Button time. You've almost certainly got a reportable breach; depending on how tightly you're able to scope it maybe it won't be company-ending.

> If anyone here is HIPAA-regulated or you have a customer who is

Cloudflare certainly does; I founded a health tech company, and Cloudflare was the recommended go-to for health tech startups who needed a CDN while serving PHI.

And this is definitely a reportable breach. Technically any breach is supposed to be reported to HHS, but in reality, a lot of covered entities (e.g. insurers) fail to report smaller breaches (which, as a patient, should terrify you). The big ones, though, are really, really bad, and when reported, the consequences can be very serious and potentially even include serving time, depending on the circumstances.

The reason I can be so confident that this is a reportable breach is that the definition of PHI is so broad that even revealing the existence of information between two known entities can be considered protected information. Anything more specific, like a phone number or DOB, or time of an appointment (even if you don't know who the appointment corresponds to) - that's always protected. And Cloudflare certainly has many of those.

Re: Cloudflare Reverse Proxies Are Dumping Uninitialized Memory

#620
post #582

Another day, another C memory safety bug that completely breaks all security everywhere. We're definitely doomed to repeat the same mistakes over and over.

Probably only for 30-50 more years, honestly.

Most honest comment in this entire thread.
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