Kr00k affects all devices with Broadcom and Cypress Wi-Fi chips that remain unpatched. These are the most common Wi-Fi chips used in today’s client devices. Wi-Fi access points and routers are also affected by the vulnerability, making even environments with patched client devices vulnerable. ESET tested and confirmed that among the vulnerable devices were client devices by Amazon (Echo, Kindle), Apple (iPhone, iPad, MacBook), Google (Nexus), Samsung (Galaxy), Raspberry (Pi 3) and Xiaomi (Redmi), as well as access points by Asus and Huawei.
ESET responsibly disclosed the vulnerability to the chip manufacturers Broadcom and Cypress, who subsequently released patches. We also worked with the Industry Consortium for Advancement of Security on the Internet (ICASI) to ensure that all possibly affected parties – including affected device manufacturers using the vulnerable chips, as well as other possibly affected chip manufacturers – were aware of Kr00k. According to our information, devices by major manufacturers have now been patched.