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Difference between revisions of "Limera1n"
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[[Image:Ra1ndrop.png|right]] |
[[Image:Ra1ndrop.png|right]] |
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| − | This is [[User:Geohot|geohot's]] latest [[jailbreak]] utility. It uses an undisclosed bootrom exploit |
+ | This is [[User:Geohot|geohot's]] latest [[jailbreak]] utility. It uses an undisclosed bootrom exploit and an undisclosed kernel exploit found by [[User:Comex|comex]] to achieve an [[untethered jailbreak]] on newer devices. |
* [[N88ap|iPhone 3GS]] |
* [[N88ap|iPhone 3GS]] |
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| Line 7: | Line 7: | ||
* [[N81ap|iPod touch 4G]] |
* [[N81ap|iPod touch 4G]] |
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* [[K48ap|iPad]] |
* [[K48ap|iPad]] |
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| − | * [[K66ap| |
+ | * [[K66ap|AppleTV 2G]] ([http://www.tuaw.com/2010/10/09/limera1n-jailbreak-released-greenpois0n-jailbreak-delayed/ However it's current usefulness is debatable]) |
It has been demonstrated multiple times by [[User:Geohot|geohot]], using blog posts on his now private blog. [[User:Geohot|Geohot]] [http://1.bp.blogspot.com/_NJ4JFBfr1tY/TDgkAsTQEmI/AAAAAAAAAcw/ZNHDxMNNL4Y/s1600/iphone4.png showed off a high-res picture of Cydia on an iPhone 4]. He [http://www.youtube.com/watch?v=__TR86PLiHw displayed an iPod touch 3G with an untethered jailbreak] that met MuscleNerd's requirements for a good video. In addition, he took a [http://4.bp.blogspot.com/_NJ4JFBfr1tY/S7_OvGMqJMI/AAAAAAAAAcE/R5WLrCizGw0/s1600/ipad_jb.jpg picture of Cydia and blackra1n icons on his iPad's SpringBoard]. |
It has been demonstrated multiple times by [[User:Geohot|geohot]], using blog posts on his now private blog. [[User:Geohot|Geohot]] [http://1.bp.blogspot.com/_NJ4JFBfr1tY/TDgkAsTQEmI/AAAAAAAAAcw/ZNHDxMNNL4Y/s1600/iphone4.png showed off a high-res picture of Cydia on an iPhone 4]. He [http://www.youtube.com/watch?v=__TR86PLiHw displayed an iPod touch 3G with an untethered jailbreak] that met MuscleNerd's requirements for a good video. In addition, he took a [http://4.bp.blogspot.com/_NJ4JFBfr1tY/S7_OvGMqJMI/AAAAAAAAAcE/R5WLrCizGw0/s1600/ipad_jb.jpg picture of Cydia and blackra1n icons on his iPad's SpringBoard]. |
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| + | '''Release Date:''' October 9, 2010 |
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| − | limera1n was released to the public on October 9, 2010, delaying the release of [[greenpois0n]] using the SHAtter exploit. [[greenpois0n]] has been rewritten to use the same exploit that limera1n uses. It only supports Windows and Mac OS X at the moment, and there are some devices with issues. |
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| + | '''Supported OS's:''' Mac OS X, Windows |
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| + | '''Supported Operations:''' Hacktivation, jailbreaking |
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| − | Limera1n also installs a hacktivation dynamic library (.dylib) to /usr/lib, no matter if the device is properly activated by [[iTunes]] or not. This is lazy and can pose some issues (such as Push Donor users having to restore their device). It's recommended to properly remove this dylib only if you can activate via iTunes. A guide to do so can be found [http://www.cmdshft.ipwn.me/blog/?p=555 here]. |
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==Release text== |
==Release text== |
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=== Process === |
=== Process === |
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The jailbreak appears to execute something like the following (in no particular order): |
The jailbreak appears to execute something like the following (in no particular order): |
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| − | * In |
+ | * In recovery1, |
"setenv debug-uarts 1 |
"setenv debug-uarts 1 |
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setenv auto-boot false |
setenv auto-boot false |
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saveenv" |
saveenv" |
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* In [[DFU]], it uploads a [[payload]]. |
* In [[DFU]], it uploads a [[payload]]. |
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| − | * In |
+ | * In recovery2, it uploads another [[payload]] and its [[ramdisk]]. |
"setenv auto-boot true |
"setenv auto-boot true |
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reset |
reset |
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==Controversy== |
==Controversy== |
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| − | The release of this jailbreak was specifically designed to pressure [[ |
+ | The release of this jailbreak was specifically designed to pressure [[Chronic Dev]] into not releasing the SHAtter exploit, but to instead implement the limera1n exploit into [[greenpois0n]]; after releasing limera1n, releasing [[SHAtter]] would uselessly disclose another [[bootrom exploit]] to Apple. |
| − | After releasing limera1n, releasing [[SHAtter]] would uselessly disclose another [[bootrom exploit]] to Apple. |
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| − | [[User:Geohot| |
+ | [[User:Geohot|Geohot]]'s rationale is that Apple already discovered, through internal testing, the limera1n exploit, making it very likely that it will be fixed in the next bootrom revision. Because [[iBoot]] code is present both in the bootrom and firmware, and because firmware is refreshed much more often that bootrom code, any fix in this code branch would appear first in firmware. [[User:Geohot|Geohot]] observed his limera1n exploit was closed in firmware and concluded that it would almost certainly be fixed in the next bootrom revision, whereas SHAtter still has a chance of remaining useful for an indefinite amount of time. |
| − | + | Limera1n's [[Untethered jailbreak|untethered]] userland exploit for iOS 4.0 and 4.1 was obtained by [[User:Geohot|geohot]] under questionable circumstances from [[User:Comex|comex]]. [[User:Comex|Comex]] did end up fixing the kernel patching code by beta2, so as to not break users' devices. |
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| + | |||
| + | == Hacktivation == |
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| + | Limera1n will copy a dylib to unlock the phone to /usr/lib, whether it has been activated using iTunes or not. This, while helpful to many, is also harmful to legitimate activators. For a good guide, see the link below. |
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==External Links== |
==External Links== |
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* [http://www.mediafire.com/?5sovoo41rbcdspw Limera1n RC Beta2 Dump on Mediafire provided by iH8sn0w.] |
* [http://www.mediafire.com/?5sovoo41rbcdspw Limera1n RC Beta2 Dump on Mediafire provided by iH8sn0w.] |
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* [http://www.pastie.org/1210054 Veence's explanation for release] |
* [http://www.pastie.org/1210054 Veence's explanation for release] |
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| + | * [http://www.cmdshft.ipwn.me/blog/?p=555 Hacktivation removal guide.] |
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Revision as of 19:46, 17 October 2010
This is geohot's latest jailbreak utility. It uses an undisclosed bootrom exploit and an undisclosed kernel exploit found by comex to achieve an untethered jailbreak on newer devices.
- iPhone 3GS
- iPhone 4
- iPod touch 3G
- iPod touch 4G
- iPad
- AppleTV 2G (However it's current usefulness is debatable)
It has been demonstrated multiple times by geohot, using blog posts on his now private blog. Geohot showed off a high-res picture of Cydia on an iPhone 4. He displayed an iPod touch 3G with an untethered jailbreak that met MuscleNerd's requirements for a good video. In addition, he took a picture of Cydia and blackra1n icons on his iPad's SpringBoard.
Release Date: October 9, 2010 Supported OS's: Mac OS X, Windows Supported Operations: Hacktivation, jailbreaking
Contents
Release text
iPhone 3GS, iPod Touch 3G, iPad, iPhone 4, iPod Touch 4G
4.0-4.1 and beyond+++
limera1n is unpatchable
untethered thanks to jailbreakme star comex
brought to you by geohot
hacktivates
Mac coming in 7 years
donations keep support alive
Credit
- geohot - the program itself, and bootrom exploit.
- comex - userland exploit that allows limera1n to run untethered.
Changelog
| BETA 1 | 9 Oct 2010 XX:XX GMT | 2f2b09a6ed5c5613d5361d8a9d0696b6 | First release. |
| BETA 2 | 10 Oct 2010 XX:XX GMT | a70dccb3dfc0e505687424184dc3d1ce | Fixed kernel patching magic. Rerun BETA2+ over BETA1. |
| BETA 3 | 10 Oct 2010 XX:XX GMT | 81730090f7de1576268ee8c2407c3d35 | Fixed an issue with iPhone 3GS (new bootrom) |
| BETA 4 | 10 Oct 2010 XX:XX GMT | d901c4b3a544983f095b0d03eb94e4db | Uninstall fixed, respring fixed |
| RC1 | 11 Oct 2010 XX:XX GMT | 0622d99ffe4c25f75c720a689853845f | out of beta! afc2, reliability improvements, no reboot for cydia, 2kb smaller |
| RC1b | 11 Oct 2010 XX:XX GMT | fc6f7d696a57c3baede49bdff8a7f43f | addresses an install issue, mainly with iPads |
| Final | 11 Oct 2010 23:XX GMT | fc6f7d696a57c3baede49bdff8a7f43f | (same as RC1b) |
Technical Information
Basics
- limera1n uses a different exploit to SHAtter.
- limera1n uses a bootrom exploit to achieve the tethered jailbreak and unsigned code execution.
- limera1n uses a userland exploit to make it untethered, which was developed by comex.
- limera1n uses a hacktivation dylib to activate, even on devices already activated by iTunes
Exploits
Details of the bootrom exploit to follow.
Process
The jailbreak appears to execute something like the following (in no particular order):
- In recovery1,
"setenv debug-uarts 1 setenv auto-boot false saveenv"
"setenv auto-boot true reset geohot done"
Interesting Messages
"geohot black is the new purple"
"blackra1n start: %d current IRQ mask is %8.8X usb irq disabled...shhh fxns found @ %8.8X %8.8X found iBoot @ %8.8X i'm back from IRQland... 3g detected, kicking nor nor kicked memcpy done iBoot restored!!! found command table @ %8.8X cmd_geohot added time to pray...%8.8X"
"2.2X send command(%d): %s
send exploit!!!
sent data to copy: %X
sent shellcode: %X has real length %X
never freed: %X
sent fake data to timeout: %X
sent exploit to heap overflow: %X
sending file with length: 0x%X Mingw runtime failure:
VirtualQuery failed for %d bytes at address %p Unknown pseudo relocation protocol version %d.
Unknown pseudo relocation bit size %d."
Controversy
The release of this jailbreak was specifically designed to pressure Chronic Dev into not releasing the SHAtter exploit, but to instead implement the limera1n exploit into greenpois0n; after releasing limera1n, releasing SHAtter would uselessly disclose another bootrom exploit to Apple.
Geohot's rationale is that Apple already discovered, through internal testing, the limera1n exploit, making it very likely that it will be fixed in the next bootrom revision. Because iBoot code is present both in the bootrom and firmware, and because firmware is refreshed much more often that bootrom code, any fix in this code branch would appear first in firmware. Geohot observed his limera1n exploit was closed in firmware and concluded that it would almost certainly be fixed in the next bootrom revision, whereas SHAtter still has a chance of remaining useful for an indefinite amount of time.
Limera1n's untethered userland exploit for iOS 4.0 and 4.1 was obtained by geohot under questionable circumstances from comex. Comex did end up fixing the kernel patching code by beta2, so as to not break users' devices.
Hacktivation
Limera1n will copy a dylib to unlock the phone to /usr/lib, whether it has been activated using iTunes or not. This, while helpful to many, is also harmful to legitimate activators. For a good guide, see the link below.
