Quote:
Originally Posted by simonpacis
For anyone interested in seeing what we can do, I created a GitHub repo here: https://github.com/simonpacis/DripBreak
My current idea is looking at jxrlib's source code and patching the JPEG XR encode-part, so that it creates a JPEG XR-file with the necessary adjustments to exploit the Kindle. |
The reason why I wanted to implement it in Python is because the JPEG-XR codec is incredibly complex - at least for me. Writing a simplified solution that takes an input image, encodes it to JPEG-XR using the system-provided codec, then parses the output file and adds the appropriate exploit bytes in a properly parsed object sounds much more doable. All you need is the objectified structure of the file, and addressing the exploitable parts.