Loading 3D model… large boards can take a moment.
Copyright (C) 2019, Uri Shaked. Released under the MIT license.
Learn more in the blog post: Capture The Flag Shitty Add-On
The ctf-shittyaddon board includes the following hardware:
You can also hack a simplified version on a breadboard:
Compile the firmware using the Arduino IDE:
SELFPRGEN=1).
This can be done using avrdude:
avrdude -pattiny85 -cusbtiny -e -Uefuse:w:0xfe:m -Uhfuse:w:0xdf:m -Ulfuse:w:0xe2:m
When building your own firmware, replace SECRET in the string "$FLAG:SECRET"
with your secret value (the flag).
The firmware code implements an I2C slave listening on address 0x23.
The challenge consists of several milestones of increasing difficulty:
All the above milestones can be achieved through I2C communication with the chip.
For more information, check out the blog post
No comments yet. Be the first to ask about this board.