25 Apr '17, 5am

ESP32’s Freedom Output Lets You Do Anything https://t.co/iRVS7UlqFR

ESP32’s Freedom Output Lets You Do Anything https://t.co/iRVS7UlqFR

The ESP32 is Espressif’s new wonder-chip, and one of the most interesting aspects of its development has been the almost entirely open-source development strategy that they’re taking. But the “almost” in almost entirely open is important — there are still some binary blobs in the system, and some of them are exactly where a hacker wouldn’t want them to be. Case in point: the low-level WiFi firmware. So that’s where [Jeija]’s reverse engineering work steps in. He’s managed to decode enough of a function called ieee80211_freedom_output to craft and send apparently arbitrary WiFi data and management frames, and to monitor them as well. This ability is insanely useful for a WiFi device. With low-level access like this, one can implement custom protocols for mesh networking, low-bandwidth data transfers, or remove the requirement for handshaking entirely. One can also spam a sy...

Full article: http://hackaday.com/2017/04/24/esp32s-freedom-output-lets...

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techon.nikkeibp.co.jp 25 Apr '17, 2am

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