IoT's Security Nightmare: Unpatched Devices that Never Die

As the Internet of Things becomes a ubiquitous idea and a fact of life, what happens to all the aging and increasingly insecure Things? According to Wired's Robert Mcmillan, responding to a recent question on the security of IoT from Dan Geer, this may be a serious problem [1][2]. The solution, Mcmillan suggests, is to design these devices with an expiration date. In other words: they need to be programmed to die.

The problem may not be too severe now, but the future of the Internet of Things will look different than it does now. Security will likely loosen, because software will be a part of everything, and it tends to be the case that things mass produced to that degree experience a bit of a drop in quality. That, Mcmillan argues, presents a problem:

...all code has bugs, and in the course of time, these bugs are going to be found and then exploited by a determined attacker. As we build more and more devices like thermostats and lightbulbs and smart trashcans that are expected to last much longer than a PC or a phone, maybe we need to design them to sign off at the point where they’re no longer supported with software patches. Otherwise, we’re in for a security nightmare.

A similar argument came from Bruce Schneier's interview with Scott Berinato about how future bugs like Heartbleed could impact IoT [3]. Schneier's conclusion is that processes must be built into IoT devices and development to allow for regular patching and securing of embedded systems. How practical is that, though? Mcmillan points to some recent scenarios where these fears have already come true: the lack of support for Linksys routers infected with Moon Worm, for example. Long-term patching would solve these issues, but will the increasing number of organizations developing IoT products be forward-thinking enough to care?

It's also not as if the problem will fade as the products become less popular, Mcmillan says:

Researchers have studied the way that security vulnerabilities are discovered, and what they’ve found is that security bugs will keep cropping up, long after most software is released... in fact, they’ll only get worse.

Open sourcing technology as it ages may also be a solution, Mcmillan says. However, even that is imperfect and requires a lot of cooperation from companies who may not be enthusiastic about such cooperation, as well as a base of developers interested enough in the technology to maintain it.

So, creating devices with an expiration date may be one of the most practical solutions. Otherwise, what happens when IoT is everywhere? What happens when we stop taking care of the things that we build? 

[1] http://www.wired.com/2014/05/iot-death/

[2] http://geer.tinho.net/geer.secot.7v14.txt

[3] https://dzone.com/articles/heartbleed-iot-how-much-worse