FYI: 0-click iMessage attack
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Most Sophisticated iPhone Attack Ever Used A Hidden Hardware Feature To Backdoor iOS - BGR
Kaspersky says Operation Triangulation is the most sophisticated iPhone hack ever, involving a mysterious hidden hardware component.


Operation Triangulation: The last (hardware) mystery
Recent iPhone models have additional hardware-based security protection for sensitive regions of the kernel memory. We discovered that to bypass this hardware-based security protection, the attackers used another hardware feature of Apple-designed SoCs.
