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Undocumented Commands Found In Bluetooth Chip Manufactured in China Used By a Billion Devices. (www.tarlogic.com)

submitted 23 hours ago* (last edited 5 hours ago) by Tea@programming.dev to c/cybersecurity@infosec.pub

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https://themarkup.org/blacklight?url=https%3A%2F%2Fwww.tarlogic.com%2Fnews%2Fbackdoor-esp32-chip-infect-ot-devices%2F&device=mobile&location=us-ca&force=false

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. 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.

Update: The ESP32 "backdoor" that wasn't.

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[–] The_Decryptor@aussie.zone 15 points 18 hours ago* (last edited 18 hours ago)

Tarlogic has detected that ESP32 chips, which allow connectivity via WiFi or Bluetooth, have hidden commands not documented by the manufacturer. These commands would allow modifying the chips arbitrarily to unlock additional functionalities, infecting these chips with malicious code, and even carrying out attacks of identity theft of devices.

It's not a backdoor, it's a jailbreak. Sounds like they left the debug functionality enabled but just undocumented.

Edit: They're undocumented HCI commands, that's the protocol the host (aka CPU) uses to talk to the chip, not a remote device.