How It Works

LetterBomb works by exploiting a buffer overflow exploit in the Wii Messaging Board. By addressing a specific letter to the Wii (by using it’s MAC Addresses), you can cause the Wii to read such a large message that it overflows and accidentally reads and executes the embedded Homebrew Channel inside of the letter’s file.

To know more about how it works, watch the 25C3 video where the developers explain how they did this.