Spirit

Spirit is an untethered jailbreak by comex (et al.) for Mac OS X, Windows, and Linux that jailbreaks all devices running iOS 3.1.2 through 3.2. Spirit also requires iTunes 9.0 or greater to be installed. It is a userland exploit, unique in that it does not rely on an iBoot/bootrom exploit. Since MobileBackup requires activation to be used, Spirit requires activation. It appears to copy a dylib to the "/var/mobile/Media/spirit" folder and adds a startup daemon that seemingly allows the jailbreak to work untethered.

Exploits

 * MobileBackup Copy Exploit
 * Incomplete Codesign Exploit
 * BPF_STX Kernel Write Exploit