Apple Credits Evasi0n Jailbreak Team for Latest iOS Update
The newest iOS update patches up several vulnerabilities, including a security bug that would allow someone to bypass the lock screen to view contacts, make phone calls, listen to voicemails, and invade your privacy in general.
Ironically, many of the same vulnerabilities Apple patched were ones used by the evasi0n jailbreak, which is typically how jailbreaking works. What's a bit unusual in this case is that Apple gave several shout outs to the evad3rs team responsible for evasi0n in the release notes for iOS 6.1.3.
In addition to those exploited by evasi0n, iOS 6.1.3 also addressed a few other security flaws, including a USB-based vulnerability that would allow a local user to execute arbitrary code in the kernel.