Re: NSA able to compromise Cisco, Juniper, Huawei switches

* Warren Bailey:

Explaining, not a denial written by their legal department. I find it insanely difficult to believe cisco systems has a backdoor into some of their product lines with no knowledge or participation.

As far as I understand it, these are firmware tweaks or implants sitting on a privileged bus (think PCI with busmaster DMA). Such things can be added after the device has left the factory by a sufficiently knowledgeable third party.