From Newsgroup: comp.security.misc

Update 3/9/25: After receiving concerns about the use of the term
'backdoor' to refer to these undocumented commands, we have updated our
title and story. Our original story can be found here.

The ubiquitous ESP32 microchip made by Chinese manufacturer Espressif
and used by over 1 billion units as of 2023 contains undocumented
commands that could be leveraged for attacks.

The undocumented commands allow spoofing of trusted devices,
unauthorized data access, pivoting to other devices on the network, and potentially establishing long-term persistence.

This was discovered by Spanish researchers Miguel Tarasc� Acu�a and
Antonio V�zquez Blanco of Tarlogic Security, who presented their
findings yesterday at RootedCON in Madrid.

"Tarlogic Security has detected a backdoor in the ESP32, a
microcontroller that enables WiFi and Bluetooth connection and is
present in millions of mass-market IoT devices," reads a Tarlogic
announcement shared with BleepingComputer.

"Exploitation of this backdoor would allow hostile actors to conduct impersonation attacks and permanently infect sensitive devices such as
mobile phones, computers, smart locks or medical equipment by bypassing
code audit controls."

The researchers warned that ESP32 is one of the world's most widely
used chips for Wi-Fi + Bluetooth connectivity in IoT (Internet of
Things) devices, so the risk is significant[...]

https://www.bleepingcomputer.com/news/security/undocumented-commands-found-in-bluetooth-chip-used-by-a-billion-devices/
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Eduardo.M - Brasil
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