Hacking the Canon imageCLASS MF742Cdw/MF743Cdw (again)

There has been quite a bit of documentation about exploiting the CANON Printer firmware in the past. For some more background information I suggest reading these posts by SYNACKTIV, doar-e and DEVCORE. I highly recommend reading all of it if you want to learn more about hacking (CANON) Printers.

The TL;DR is: We’re dealing with a Custom RTOS called DRYOS engineered by CANON that doesn’t ship with any modern mitigations like W^X or ASLR. That means that after getting a bit acquainted with this alien RTOS it is relatively easy to write (reliable) exploits for it.

Having a custom operating system doesn’t mean it’s more secure than popular solutions.

One Response

  1. 2023-11-23 3:06 pm