fred's notes

Breaking Secure Boot on Google Nest Hub (2nd Gen) to run Ubuntu

Posted on Wed 15 June 2022 in Article • Tagged with arm, amlogic, bootloader, exploit, nest, secureboot, uboot, ubuntu, usb

In this post, we attack the Nest Hub (2nd Gen), an always-connected smart home display from Google, in order to boot a custom OS.

First, we explore both hardware and software attack surface in search of security vulnerabilities that could permit arbitrary code execution on the device.

Then, using a …

Emulating Exynos 4210 BootROM in QEMU

Posted on Wed 07 March 2018 in Article • Tagged with arm, exynos, samsung, bootrom, qemu, emulation, bootloader, secureboot

QEMU has support for the SMDKC210 machine, an ARM board based on Exynos 4210 SoC. Peripherals implemented in QEMU for this machine are UART, SDHCI, FIMD, I2C, Interrupt Combiner, GIC, Clock, PMU, RNG, MCT, PWM, RTC.

Samsung Galaxy S2 phone is also based on Exynos 4210, so it should be …