Accuvant LABS Blog has a cool analysis of the Evasi0n Jailbreak’s Userland Component.
The latest jailbreak is out, and it’s time to dissect it and document all the exploits and techniques it contains. These days, jailbreaks are so well tested that it’s easy for people to forget all the complexity that goes into them. There are numerous exploit mitigations in iOS userland, such as sandboxing, ASLR, and code signature requirements that make jailbreaking incredibly difficult.
Via Daring Fireball