The second operating system hiding in every mobile phone -
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"I've always known this, and I'm sure most of you do too, but we never really talk about it. Every smartphone or other device with mobile communications capability (e.g. 3G or LTE) actually runs not one, but two operating systems. Aside from the operating system that we as end-users see (Android, iOS, PalmOS), it also runs a small operating system that manages everything related to radio. Since this functionality is highly timing-dependent, a real-time operating system is required."
"With this in mind, security researcher Ralf-Philipp Weinmann of the University of Luxembourg set out to reverse engineer the baseband processor software of both Qualcomm and Infineon, and he easily spotted loads and loads of bugs, scattered all over the place, each and every one of which could lead to exploits - crashing the device, and even allowing the attacker to remotely execute code. Remember: all over the air. One of the exploits he found required nothing more but a 73 byte message to get remote code execution. Over the air."
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