September 2024
Intermediate to advanced
408 pages
7h 29m
English
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3 MD380 Null Pointer, DFU
While it’s brutally effective to exploit a chip vendor’s bootloader in ROM, many device vendors add a second bootloader in flash memory. This is the story, first told in Goodspeed (2016b), of how I dumped a two-way radio’s firmware through a null pointer read vulnerability. It is also the story of how the firmware update cryptography was broken, from Rütten and Goodspeed (2016).
The Tytera MD380 is a handheld radio transceiver that uses either analog FM or Digital Mobile Radio (DMR). DMR provides some of the features of GSM, such as text messaging and timesharing of the repeater tower, without the hassles of SIM cards. Many people purchased the MD380 for use in amateur radio; it was just too tempting to rip out its firmware ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.