![]() Hot-swap code or even the entire firmware.Conduct remote man-in-the-middle attacks.The team at Lyrebirds have suggested the following as a minimum of what they believe can be accomplished: The malicious code could then allow the modem to do a number of things. This can be really bad because instead of writing the letter “A” in the start frequency location, one could write malicious code in the start frequency location. A buffer overflow occurs when writing data to a program overruns the programs buffers, or memory, and then overwrites adjacent memory locations. This is something that is called a buffer overflow. The team Lyrebirds in Denmark found that by entering a bunch of letter ‘A’s into the Start frequency of the spectrum it would cause the cable modem to crash and reboot. Here is an image of the spectrum analyzer from an SBG6900-AC cable modem:įigure 1: Spectrum Analyzer Display on Arris SBG6900-AC Cable Modem What Went Wrong It’s a great feature if you are a cable technician or a DYI home networking person trying to improve your own network performance. ![]() ![]() ![]() WiFi to the cable modem network from within the home). In most cases there is no password access required to open and view the downstream spectrum analyzer when connected directly to the cable modem or even connected wirelessly (i.e. One aspect of the spectrum analyzer is that it can be used directly from the subscriber side of the cable modem by accessing the cable modem’s local IP address, which is typically or ![]()
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