Corona is a Cydia package from the Chronic Dev Team on Saurik's repo. It uses pod2g's Racoon String Format Overflow Exploit and an HFS Heap Overflow to untether iOS 5.0.1 on previously-jailbroken devices. Alternatively, users can also re-run the iPhone Dev Team's redsn0w 0.9.10 to untether their jailbreak with the same exploit. The name is an anagram of the aforementioned racoon software.
According to pod2g's blog [Archived 2012-01-08 at the Wayback Machine], he was having problems with the app sandboxing system used on the A5 processor in the iPad 2 and iPhone 4S. So he enlisted the help of planetbeing, MuscleNerd, Joshua Hill and saurik, dubbed the "Dream Team", to help him fix it [Archived 2012-01-08 at the Wayback Machine]. Dustin Howett also demoed the A5 jailbreak on YouTube. It was released on 20 January 2012 as Absinthe.
- 1.0-8 Fixed an issue where corona failed on iPhone 4S on iOS 5.0
- 1.0-7 1.0-6 had a "Depends" that made it refuse to install on an original iPad.
- 1.0-6 fixed iBooks issues (books having DRM may show half pictures and/or grey rectangles).
- 1.0-5 was updated by Saurik again to require a reboot after installing.
- 1.0-4 includes sandbox patches by comex that fixes iBooks problems, as well as another fix for launchctl. [Archived 2012-01-18 at the Wayback Machine]
- 1.0-3 was updated by Saurik to enable redsn0w 0.9.10 users to update the jailbreak through Cydia.
- 1.0-2 attempted to fix a bug that caused launchctl to not start daemons on-demand.
- 1.0-1 is the initial release of the jailbreak.