Practical Hardware Pentesting by Jean-Georges Valle

Author:Jean-Georges Valle [Jean-Georges Valle]
Language: eng
Format: epub, mobi
Publisher: Packt Publishing
Published: 2021-03-31T16:00:00+00:00

Other Wi-Fi attacks

Some other attacks exists, but they usually target the Wi-Fi infrastructure, not the device. An excellent introduction book is Vivek Ramachandran's Wireless Penetration Testing Beginner's Guide.

Networking in embedded systems using Bluetooth

Many devices have Bluetooth connectivity available, from phones to headsets to input devices. Let's see what we can look at with this interface.

Bluetooth basics

Bluetooth is a radio protocol that operates between 2.4 and 2.48 GHz. It is not easy to sniff because it is transmitted by hopping on multiple frequencies pseudorandomly (depending on the address of the master device) and has several variants:

BT/1.x (2000), also known as the ancestor: This has not been deployed in new products for a long time. It had privacy problems since it was sending a unique ID over the air.

BT/2.x (2004), also known as classic Bluetooth: This has been around for years and is "kind of" kept in the hands of the big players of the market. This is the doing of Apple since, to be able to be used by iPhones, you have to send an entry ticket to them (called the MFi). It is faster than BT1 and introduces a better pairing system and effort in terms of energy consumption.

BT/3.x (2009), also known as "high speed" (HS): This comes with some (optional) hi-speed transfers over Wi-Fi and introduces connection less low latency data transfer and some more effort in terms of consumption.

BTLE/4.x (2010), also known as "Low Energy" or "smart": This actually adds a Bluetooth Low Energy (BLE) on top of classic and HS, with a very large reduction in terms of power consumption for the BLE part.

BT5.x (2018): This is the latest version, but it is only supported by some flagship phones and a few devices at the moment. Adoption will probably be larger in the future.

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