Pod2g has bypassed ASLR at bootup, making progress towards the public release of an iOS 5.1 jailbreak. ASLR is a security method that randomly arranges important data areas.

ASLR seems bypassed! Weird machines FTW. Time to ROP the payload.

Earlier this week pod2g revealed that the Chronic Dev-Team now has all the exploits required to release a userland jailbreak of iOS 5.1; however, it will take some time to put them together in a public ready tool.