Millions of iPhone users who have updated to iOS 17 face a potential threat from a widely available "multi-tool device for geeks.” The $169 Flipper Zero can crash an iPhone by flooding it with connection requests. Currently, the only way to prevent an attack is to completely switch off Bluetooth. First reported by security researcher Jeroen van der Ham, the attack uses a Flipper Zero. According to its manufacturer, this software-controlled radio can be used to "hack digital stuff, such as radio protocols, access control systems, hardware, and more.” It is available directly from the manufacturer for $169. Thanks to its open-source design, it can be flashed with custom firmware, opening up many possibilities. One of these firmware options is Flipper Xtreme. One setting allows a Flipper Zero to announce the availability of a Bluetooth Low Energy device close to an iPhone, an annoyance but no more. Another setting—the setting that triggers the denial of service attack—is simply labelled “