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Senrio: JTAG explained

Senrio has a nice blog post on JTAG usage on consumer IoT devices:

JTAG Explained (finally!): Why “IoT”, Software Security Engineers, and Manufacturers Should Care: Imagine you are handed this device and asked to get root on it as quickly as possible. No further information is given. Where would you begin?  (If you just want to see the router get rooted, jump down to “Mounting an Attack: Rooting a Home Router” 😉 Our target: A VERY common/popular consumer Access Point. Since you have the device in your hands, you might try directly attacking the hardware. However, if you’ve never done any kind of hardware hacking, getting started can be intimidating. In this post, we are going to talk about the fundamental information you need to know to use JTAG for hacking hardware. We’ll also go over a quick example to illustrate the power of direct hardware access. […]

http://blog.senr.io/blog/jtag-explained

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