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Difference between revisions of "Diags (iBoot command)"
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==Exploit== |
==Exploit== |
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| − | This is a very |
+ | This is a very easy-to-use exploit. In earlier iBoots, if a parameter was given to the 'diags' command, then it would jump to whatever address argv[1] specified, but not before disabling the GPIO devices. You can run unsigned code on the S5L using this, but the GPIOs need to be restored if you intend to use any I/O again (such as the screen or serial or USB). |
In 2.0 iBoots, they have a flag check on this command (checks bit 4 of the iBoot flags), and that flag will not be present on a retail device, just an engineering one with a 'whitelisted' CHIPID, so this exploit doesn't work. |
In 2.0 iBoots, they have a flag check on this command (checks bit 4 of the iBoot flags), and that flag will not be present on a retail device, just an engineering one with a 'whitelisted' CHIPID, so this exploit doesn't work. |
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Revision as of 04:07, 12 December 2008
This was an exploit that allowed the running of unsigned code at iBoot level present of pre-2.0 versions of iBoot.
Credit
Exploit
This is a very easy-to-use exploit. In earlier iBoots, if a parameter was given to the 'diags' command, then it would jump to whatever address argv[1] specified, but not before disabling the GPIO devices. You can run unsigned code on the S5L using this, but the GPIOs need to be restored if you intend to use any I/O again (such as the screen or serial or USB).
In 2.0 iBoots, they have a flag check on this command (checks bit 4 of the iBoot flags), and that flag will not be present on a retail device, just an engineering one with a 'whitelisted' CHIPID, so this exploit doesn't work.
