Design/Logic Flaw

The Comcast firmware on Cisco DPC3939 firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST and DPC3939 firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST devices sets the CM MAC address to a value with a two-byte offset from the MTA/VoIP MAC address, which indirectly allows remote...