Kr00k


Kr00k is a security vulnerability that allows some WPA2 encrypted WiFi traffic to be decrypted. The vulnerability was originally discovered by security company ESET in 2019 and assigned on August 17th, 2019. ESET estimates that this vulnerability affects over a billion devices.

Discovery

Kr00k was discovered by ESET Experimental Research and Detection Team, most prominently ESET security researcher Miloš Čermák.
It was named Kr00k by Robert Lipovský and Štefan Svorenčík. It was discovered when trying variations of the KRACK attack.
Initially found in chips made by Broadcom and Cypress, similar vulnerabilities have been found in other implementations, including those by Qualcomm and MediaTek.

Patches

The vulnerability is known to be patched in:
During their research, ESET confirmed over a dozen popular devices were vulnerable.
Cisco has found several of their devices to be vulnerable and are working on patches. They are tracking the issue with advisory id cisco-sa-20200226-wi-fi-info-disclosure.
Known vulnerable devices include: