Much to everyone’s concern, there have been discovered serious weaknesses in WPA2, a protocol that secures all modern protected Wi-Fi networks. An attacker within range of a victim can exploit these weaknesses using key reinstallation attacks (KRACKs), notes krackattacks.com.
The “Krack” attack works by exploiting the “handshake” that a WiFi network and a device give to each other when the latter wants to join. Usually, the two decide on an encryption key for all future traffic, meaning that each device will only be able to read data if it has that key.
“Note that if your device supports Wi-Fi, it is most likely affected,” wrote security researcher Mathy Vanhoef, whose work was noted by the US government.