Skip to Content
Uncategorized

Secure Wi-Fi Networks Everywhere Are Wide Open to Hacks, Thanks to a Newly Discovered Security Flaw

October 16, 2017

Your wireless network isn’t as safe as you thought it was.

Security researcher Mathy Vanhoef has discovered a serious flaw, which he’s calling KRACK, in the WPA2 protocol that secures almost every modern Wi-Fi network. The vulnerability could allow hackers to inject malware into websites, or spy on people by reading information that was until now assumed to be encrypted.

The flaw exists in the verification process that’s carried out when users join a protected Wi-Fi network using a password they’ve been given. At that point, the WPA2 protocol gives the user an encryption key that’s used to scramble data being sent across the connection. That encryption key, along with some other numbers, is supposed to be used just once.

But numbers used by the protocol can sometimes be reused, and Vanhoef has shown that it’s possible to forcibly obtain them and reverse-engineer the system to decrypt transmitted data.

Vanhoef says that “any correct implementation of WPA2 is likely affected,” which means “any device that uses Wi-Fi is likely vulnerable.” Android, Apple, and Windows software is all said to be affected by KRACK attacks on some level.

The Wi-Fi alliance, which certifies Wi-Fi devices, says “there is no evidence that the vulnerability has been exploited maliciously.” It also adds that the issue “can be resolved through straightforward software updates.” Now, we just need to wait for those software updates to arrive.

Keep Reading

Most Popular

Large language models can do jaw-dropping things. But nobody knows exactly why.

And that's a problem. Figuring it out is one of the biggest scientific puzzles of our time and a crucial step towards controlling more powerful future models.

The problem with plug-in hybrids? Their drivers.

Plug-in hybrids are often sold as a transition to EVs, but new data from Europe shows we’re still underestimating the emissions they produce.

How scientists traced a mysterious covid case back to six toilets

When wastewater surveillance turns into a hunt for a single infected individual, the ethics get tricky.

Google DeepMind’s new generative model makes Super Mario–like games from scratch

Genie learns how to control games by watching hours and hours of video. It could help train next-gen robots too.

Stay connected

Illustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.