iOS 5 Untethered Jailbreak: MuscleNerd Finds Wide Gap in 4S 5.0.1 Build 9A406 IPSW

Jailbreaking community has been working really hard for the last one week to give their fans the happiness of ultimate freedom to use their Apple devices completely. Pod2g and MuscleNerd, two members from two different Dev-teams, have been in news almost every day in the last one week.

As Pod2g has already found an untethered jailbreak for the devices supported by Apple's A4 processor, these two hackers have accelerated their efforts to find out a jailbreak for A5 devices like iPad 2 and iPhone 4S.

MuscleNerd has tweeted that Apple's newly released 4S 5.0.1 build 9A406 IPSW (iPhone software) has an unencrypted ramdisk with the VFDecrypt key in plain text.

Huh...today's 4S 5.0.1 bump (9A406) has wide open main fs, he said.

Pod2g also confirmed his counterpart's finding on his blog, and wondered if it was a Christmas gift for them from Apple.

Pod2 wrote: @MuscleNerd tweeted something really interested today:

The latest ipsw released by Apple for the 4S contains an unencrypted ramdisk with the VFDencypt key in plain text.

Everybody can decrypt the filesystem with it!

Is it a Christmas gift from Apple?

MusleNerd also posted the encrypt code on his Web site.

Due to the non-encrypted ramdisks, the filesystem keys are now obtainable. Though these mainframes are wide open inspection-wise, yet security-wise they are not so.

The present finding will help hackers get more access to the 4S files and Siri files.

VFDecrypt Keys are the keys which can decrypt the files that come with the firmware.

Last Friday, iPhone Dev-team member Musclenerd confirmed that the upcoming version of redsn0w would be able to save both TinyUmbrella and Cydia blob saves useful for 5.0+ (1st verifies, then stitches).

The blob saves enable the program unlock and jailbreak the device in which they are saved.