(adsbygoogle = window.adsbygoogle || []).push({}); blackra1n is a program that jailbreaks version 3.1.2 of Apple's operating system for iDevices, known as iOS.

The program uses a bug in the USB code of the firmware for iDevices, allowing unsigned code to be executed.[1] Blackra1n uses this exploit to patch the firmware of the iDevice whilst in DFU (recovery) mode[citation needed]. The program allows users to install Cydia, Icy (removed in blackra1n RC3)[2], and Rock. These applications allow the user to access tweaks, homebrew applications, the root directory and the file system of the iDevice. Blackra1n can also perform tethered jailbreaks on the iPod Touch 3G and the iPhone 3GS, if the devices are running OS 3.1.2. Blackra1n is a stable tool used for most iDevices through iOS 3.1.3. As of 3.1.3, SpiritJB is the recommended tool for jailbreaking




Releases
Version Release Date Notes
RC1 October 11, 2009 Intitial release.
Supports iPhone OS version 3.1.2 on all models of iPhone and iPod touch.

RC2 October 25, 2009 Fixed iPhone 3G issues.
Tethered jailbreak for 3.1 iPod touch 2G and iPhone 3GS with updated bootrom.
Fixed Icy issues.

RC3 November 3, 2009 Includes blacksn0w.
Icy no longer included



References
1.^ "usb_control_msg(0x21, 2) Exploit". theiphonewiki.com. You must login or register to view this content.. Retrieved 2010-07-27.
2.^ "Sneak Peak at blackra1n RC3 with blacksn0w". Redmondpie.com. You must login or register to view this content.. Retrieved 2010-07-27.
3.^ "Spirit Jailbreak Released". iPhone Download Blog. 2010-05-02. You must login or register to view this content..




fromhttps://en.wikipedia.org/wiki/Blackra1n