Owon Hds242 Firmware 100%

OWON provides firmware updates via a .UPD file on their website. Out of curiosity, I ran binwalk on the latest version (v1.0.6 as of this writing):

$ binwalk HDS242.UPD
The scariest (and most exciting) finding: there’s no signature check on the firmware header. In theory, you could modify a single byte in the .UPD, flash it, and the scope would happily brick itself. OWON relies purely on user caution, not crypto. owon hds242 firmware
That means:
Updates are applied via USB Mass Storage mode. OWON provides firmware updates via a