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Embedded device bootloaders can be very tricky to work with! This is why researchers use tools like QEMU to emulate devices. This lab will help in understanding how embedded devices boot.
In this lab, an ARM vexpress emulated machine is supposed to boot from an SD card. The U-Boot is not able to locate the necessary files (Kernel, DTB) and hence it fails, exposing U-Boot console to the user.
Objective: Boot the machine using the files available on SD card and check the contents of the file system.
On reaching RootFS prompt, provide the following credentials:
- Username: root
- Password: <none>
Note: Opening a new tab will launch a new emulated machine.
- U-boot source: https://www.denx.de/wiki/U-Boot/SourceCode
The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:
- Using automated scanners
- Using brute force attacks
- Denial of Service attacks
- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
- Attacking the lab infrastructure
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