Wi-Fi security flaw: WPA2 Key Reinstallation Attack KRACK

Security scientists have found a few key administration vulnerabilities in the center of Wi-Fi Protected Access II (WPA2) protocol that could enable an malicious actor to hack into your Wi-Fi device and eavesdrop on the Internet connection.

WPA2 is a 13-year-old WiFi authentication generally used to secure WiFi associations, however the standard has been traded off, affecting all Wi-Fi devices—incorporating into our homes and organizations, alongside the systems administration organizations that manufacture them.

Researchers have discovered a flaw in the security protocol that’s a fixture in almost every modern Wi-Fi device, including computers, phones and routers, reported ZDNet on Monday.

Named KRACK—Key Reinstallation Attack—the confirmation of-idea attack exhibited by a group of specialists conflicts with all cutting edge secured Wi-Fi organizes and can be manhandled to take delicate data like Mastercard numbers, passwords, chat conversations, and photographs.

The bug ultimately could allow hackers to eavesdrop on network traffic — bad news for anyone sending sensitive or private information over a Wi-Fi connection. These days, that’s pretty much all of us, although this could hit businesses using wireless point-of-sale machines particularly hard.

In the case of KRACK, hackers would have to be within physical range of a vulnerable device to take advantage of the flaw, but if they’re in the right spot, they could use it to decrypt network traffic, hijack connections and inject content into the traffic stream.



Discovered by researcher Mathy Vanhoef of imec-DistriNet, KU Leuven, the KRACK attack works by exploiting a 4-way handshake of the WPA2 protocol that’s used to establish a key for encrypting traffic.

For a successful KRACK attack, an attacker needs to trick a victim into re-installing an already-in-use key, which is achieved by manipulating and replaying cryptographic handshake messages.

Ehacking Staff
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