@fail0verflow have continued their series of articles about PS4 hardware attacks titled 'PS4 Aux Hax'
I covered part 1-3 in a previous story. This time they explore a stack buffer overflow bug in the HDMI encoder firmware when HDMI-CEC is enabled, accessed via I2C and IRQ lines while disabling HDMI encoder power switch access from syscon.
I assume Sony will mitigate this attack either by changing the southbridge chip hardware in future revisions of the PS4, or by removing the option to use HDMI-CEC (Consumer Electronics Control) in settings.
OFFICIAL SITE: --> https://fail0verflow.com/blog/2018/ps4-cec/
NEWS SOURCE: PS4 Aux Hax 4: Belize via CEC (via) EurAsia