Azimuth Security: April 2013

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Unlocking the Motorola Bootloader

posted by Dan Rosenberg @ 4/08/2013 11:29:00 AM

I recently spent some time dissecting the bootloader used on Motorola's latest Android devices, the Atrix HD, Razr HD, and Razr M. The consumer editions of these devices ship with a locked bootloader, which prevents booting kernel and system images not signed by Motorola or a carrier. In this blog post, I will present my findings, which include details of how to exploit a vulnerability in the Motorola TrustZone kernel to permanently unlock the bootloaders on these phones.

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