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Difference between revisions of "S5L8720"
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| − | This is the Application Processor used on the [[ |
+ | This is the Application Processor used on the [[N72AP|iPod touch (2nd generation)]]. |
| − | ==Exploits== |
+ | == [[Bootrom]] Exploits == |
| + | * [[0x24000 Segment Overflow]] - only in [[Bootrom 240.4]] (old bootrom) |
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| − | ===[[iBoot]] / [[Kernel]] Level=== |
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| + | * [[usb_control_msg(0xA1, 1) Exploit]] |
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| − | '''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. |
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| − | * [[ARM7 Go]] - Firmware v2.1.1 |
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| − | * [[iBoot Environment Variable Overflow]] - 3.1 beta 3 and below |
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| − | * [[usb_control_msg(0x21, 2) Exploit]] - 3.1.2 and below |
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| − | |||
| − | ===[[VROM (S5L8720)|Bootrom]]=== |
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| − | * [[0x24000 Segment Overflow]] |
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==Boot Chain== |
==Boot Chain== |
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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 [[ |
+ | 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== |
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* [[S5L8720 (Hardware)]] |
* [[S5L8720 (Hardware)]] |
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* [[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]] |
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Latest revision as of 12:33, 23 March 2017
This is the Application Processor used on the iPod touch (2nd generation).
Bootrom Exploits
- 0x24000 Segment Overflow - only in Bootrom 240.4 (old bootrom)
- usb_control_msg(0xA1, 1) Exploit
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.
