Difference between revisions of "S5L8720"

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m (iBoot / Kernel Level: changed note to mean you can downgrade iboot and use either arm7 go or iboot envar. overflow for jailbreak)
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This is the Application Processor used on the [[n72ap|iPod Touch 2G]].
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This is the Application Processor used on the [[N72AP|iPod touch (2nd generation)]].
   
==Exploits==
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== [[Bootrom]] Exploits ==
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* [[0x24000 Segment Overflow]] - only in [[Bootrom 240.4]] (old bootrom)
===[[iBoot]] / [[Kernel]] Level===
 
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* [[usb_control_msg(0xA1, 1) Exploit]]
* [[ARM7 Go]] - Firmware v2.1.1
 
* [[iBoot Environment Variable Overflow]] - Firmware v3.1b1 and below (Note: [[iBoot]] on the S5l8720 can be downgraded, allowing either exploit to be used on future firmwares)
 
   
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'''Note''': [[iBoot (Bootloader)|iBoot]] on the S5L8720 can be downgraded, allowing any of the [[iBoot (Bootloader)|iBoot]] exploits to be used on future firmwares.
===[[VROM (S5L8720)|Bootrom]]===
 
* [[0x24000 Segment Overflow]]
 
   
 
==Boot Chain==
 
==Boot Chain==
[[VROM (S5L8720)|VROM]]->[[LLB]]->[[iBoot]]->[[Kernel]]->[[System|System Software]]
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[[VROM]]->[[LLB]]->[[iBoot (Bootloader)|iBoot]]->[[Kernel]]->[[Firmware|System Software]]
   
It is definitely worthy to note that the [[Pwnage]] exploit is fixed because the images are now flashed to the [[NOR]] in their encrypted [[IMG3]] containers, and the [[S5L8720 Bootrom|bootrom]] can properly sigcheck [[LLB]]. That being said, unsigned images can still be run using the [[0x24000 Segment Overflow]].
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It is definitely worthy to note that the [[Pwnage]] exploit is fixed because the images are now flashed to the [[NOR]] in their encrypted [[IMG3 File Format|IMG3]] containers, and the [[bootrom]] can properly check [[LLB]]'s signature. That being said, unsigned images can still be run using the [[0x24000 Segment Overflow]], provided the bootrom is [[Bootrom 240.4|old enough]].
   
 
==See Also==
 
==See Also==
 
* [[S5L8720 (Hardware)]]
 
* [[S5L8720 (Hardware)]]
 
* [[S5L File Formats]]
 
* [[S5L File Formats]]
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==External Links==
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* [http://infocenter.arm.com/help/topic/com.arm.doc.ddi0301h/DDI0301H_arm1176jzfs_r0p7_trm.pdf Technical Reference Manual: ARM1176JZF-S]
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[[Category:Application Processors]]

Latest revision as of 12:33, 23 March 2017

This is the Application Processor used on the iPod touch (2nd generation).

Bootrom Exploits

Note: iBoot on the S5L8720 can be downgraded, allowing any of the iBoot exploits to be used on future firmwares.

Boot Chain

VROM->LLB->iBoot->Kernel->System Software

It is definitely worthy to note that the Pwnage exploit is fixed because the images are now flashed to the NOR in their encrypted IMG3 containers, and the bootrom can properly check LLB's signature. That being said, unsigned images can still be run using the 0x24000 Segment Overflow, provided the bootrom is old enough.

See Also

External Links