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eMMC hacking, or: how I fixed long-dead Galaxy S3 phones

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eMMC hacking, or: how I fixed long-dead Galaxy S3 phones
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A journey on how to fix broken proprietary hardware by gaining code execution on it
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167
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CC Attribution 4.0 International:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Abstract
How I hacked Sasmung eMMC chips: from an indication that they have a firmware - up until code execution ability on the chip itself, relevant to a countless number of devices. It all started when Samsung Galaxy S3 devices started dying due to a bug in their eMMC firmware. I will cover how I figured out there's a firmware inside the chip, how I obtained it, and my journey to gaining code execution on the chip itself — up until the point in which I could grab a bricked Galaxy S3, and fix it by software-only means.
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