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Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

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291–300 of 424 posts

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#291

Earlier quoted context omitted.

HTTPSEverywhere will not magically upgrade a site that doesn't serve HTTPS to HTTPS. If you connect to a site that doesn't support HTTPS, you are vulnerable.

Oh I see, Thanks for the answer! For what is useful the extension then?

The extension makes you use the HTTPS connection when the site you are connecting to is known to support HTTPS.

Websites can automatically redirect to HTTPS if the client connects on http, but many websites don't redirect

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#292

This is not an end-of-the-world type vulnerability. 1. Does not affect long-term credentials - certs, wifi passwords are still safe. Rather, confidentiality (secrecy) from client --> AP is affected, and in some cases packet forgery is possible (integrity). 2. Actually accomplishing this attack, for now, requires special and expensive hardware (med to high range SDR gear). Its also not that reliable outside of a lab e…

Where did you find the information that it needs SDR? I couldn't find it in the paper (but I didnt fully read it) or the website.

As far as I can tell that’s dangerous misinformation.

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#293

Earlier quoted context omitted.

or waiting (hopelessly) for a patch from my vendor If this is an actual in the wild exploitable issue, there will be patches very quickly for handsets in the support period, as quickly as there is for iOS. This has been the case repeatedly before as well. What a weird post in general. Maybe wait to complain about this a month down the line or so? Instead it's just effectively noisy rhetoric.

There's a patch for iOS? Wonderful! Oh wait, there isn't.

Did you intend to post that reply to me? Because of course there isn't a patch for iOS yet, and when there is it will leave out hundreds of millions of devices that no longer receive patches. My point was that if one wants to stomp their feet and do the easy "Damn Android" complaint, at least wait until the basis is sound.

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#294

Earlier quoted context omitted.

HTTPSEverywhere will not magically upgrade a site that doesn't serve HTTPS to HTTPS. If you connect to a site that doesn't support HTTPS, you are vulnerable.

Oh I see, Thanks for the answer! For what is useful the extension then?

It has the option to block HTTP traffic, making sites that don't support HTTPS unusable.

You could create a separate "secure" profile and feel safe that all traffic is secured, while still being able to browse HTTP in another profile, for instance.

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#295

As an Android user is there any mitigation for this other than ditching my handset and switching to an iPhone or waiting (hopelessly) for a patch from my vendor. This really does highlight the absolute disaster zone that the Android handset market has become as far as updates are concerned. I'm sure the Pixels will get a fix relatively quickly but almost every other Android user is going to be left in security limbo.

Install one of the major ROMs like AOSP or LineageOS. Relying on your vendor for software or purchasing a device that forces you to isn't the best idea these days.

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#296
post #251

This is not an end-of-the-world type vulnerability. 1. Does not affect long-term credentials - certs, wifi passwords are still safe. Rather, confidentiality (secrecy) from client --> AP is affected, and in some cases packet forgery is possible (integrity). 2. Actually accomplishing this attack, for now, requires special and expensive hardware (med to high range SDR gear). Its also not that reliable outside of a lab e…

tcpdump -nw - | strings -n 6 Credit to https://twitter.com/marcan42

What exactly should a person who uses this command be seeing or looking for that would indicate a problem or not?

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#297

This is not an end-of-the-world type vulnerability. 1. Does not affect long-term credentials - certs, wifi passwords are still safe. Rather, confidentiality (secrecy) from client --> AP is affected, and in some cases packet forgery is possible (integrity). 2. Actually accomplishing this attack, for now, requires special and expensive hardware (med to high range SDR gear). Its also not that reliable outside of a lab e…

I do think it's an end-of-the-world type vulnerability, at least as far as Wi-Fi goes. 1) The paper claims confidentiality compromise allows the attacker to hijack a tcp connection: "allow an adversary to decrypt a TCP packet, learn the sequence number, and hijack the TCP stream to inject arbitrary data", this on all cases, even in the cases where it doesn't allow forgery (CCMP) 2) There's no such claim on the paper…

You have two school of thought here... optimist vs pessimist.

Remember that the attack affects mostly client implementations therefore still needs proximity to victim(s), this makes most of the end-of-the-world type scenarios impractical (they even state these on their QA) and leaves exploitation to direct/APT-groups alone.

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#298

Earlier quoted context omitted.

I appreciate this is coming from a UK perspective and that not everyone is this lucky, but I don't remember the last time I used public WiFi on my phone thanks to a general mistrust of it and the fact that 4G (or at least HSPA+) has very good coverage here.

Same here (Devon, UK) — although I do use the WiFi we have on buses here, and occasionally when in cafés.

This is about WiFi "protected" with WPA2: basically treat it as suspiciously as you would any public WiFi.

If you choose not to use public WiFi because you can't "trust" it, then you now need to stop using your private WiFi too (until your systems get appropriate patches).

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#299

Matthew Green's blog on why it happened and how it escaped detection is a really good read. https://blog.cryptographyengineering.com/2017/10/16/falling-...

> Representation of the 4-way handshake from the paper by He et al. Yes, I know you’re like “what?“. But that’s why people who do formal verification of protocols don’t have many friends.

+1 for a good read, really enjoyed his writing style.

For those unfamiliar, Matthew Green is a cryptography researcher and professor at Johns Hopkins.

Edit: TIL John's' Hopkins ty /u/dEnigma

Re: Key Reinstallation Attacks – Breaking WPA2 by Forcing Nonce Reuse

#300

As an Android user is there any mitigation for this other than ditching my handset and switching to an iPhone or waiting (hopelessly) for a patch from my vendor. This really does highlight the absolute disaster zone that the Android handset market has become as far as updates are concerned. I'm sure the Pixels will get a fix relatively quickly but almost every other Android user is going to be left in security limbo.

Install one of the major ROMs like AOSP or LineageOS. Relying on your vendor for software or purchasing a device that forces you to isn't the best idea these days.

> Relying on your vendor for software or purchasing a device that forces you to isn't the best idea these days.

Relying on the efforts of unpaid volunteers doing their best to hack together binary blobs is also not the best idea...

Not all devices are supported by major ROM distributors, nor is the support guaranteed to be endless or current... (even some devices as major as the Galaxy S6 for example)

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