September 2024
Intermediate to advanced
408 pages
7h 29m
English
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4 LPC1343 Call Stack
The LPC800, LPC1100, LPC1200, LPC1300, LPC1500, LPC-1700, and LPC1800 series of ARM microcontrollers from NXP are vulnerable to bootloader memory corruption. This was first described in Herrewegen et al. (2020) for the LPC1343, a Cortex M3 with 32kB of flash and 8kB of RAM. In this chapter, we’ll explore the bootloader’s protocol and the vulnerability, then walk through the steps of writing our own exploit.
LPC microcontrollers have five Code Read Protection (CRP) levels, each of which provides further restrictions on the ISP (bootloader) and SWD (debugger) access. Level 0 (NOCRP) is unprotected, allowing memory to be freely read and written through the bootloader or an SWD debugger. CRP 1 disables SWD debugging entirely, ...
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