Kernel RCE in iOS/macOS with ICMP
TL;DR: Heap buffer overflow in the network stack allowed for sending ICMP packets that would crash devices. Bug was marked as "RCE" because it's possible that it could be used for code execution, though the current PoC only causes a crash. Bug has been reported to Apple and fixed in iOS 12 and macOS Mojave 10.14. There's an excellent drawing by the author at the end of the author summarizing the exploit ;)As an aside:> Even on a Mac, XNU is highly non-trivial to build.I find it to be an extremely sad state of affairs when it requires scouring the internet for a blog post from a Darwin engineer to build an outdated XNU :(