[Tloewald]

Jailbreaking is generally voluntary on the user's part. Correct me if I'm wrong but insofar as you could jailbreak an ios device by visiting a url that would be an epic zero day exploit. Apple's secret is not allowing you to download and execute code from random websites. Oh, and memory protection.

[tarabukka]

The exploit used in comex's jailbreakme was just a PDF vulnerability. Sliding the "slide to jailbreak" simply loaded the correct PDF with some JavaScript; it wasn't actually needed.

Memory protection? That's a basic feature of a kernel? Are we talking about each platform's ability for native code to mmap() executable memory or something?

[runjake]

I think he's talking about stuff like ASLR, which didn't even begin to approach robustness until Android 4.1. iOS has had the jump (pun intended) on that for a while.

[Tloewald]

The original article concerns a bypass of application address space.