Episode 432

Ask Noah Show 432

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March 11th, 2025

53 mins 51 secs

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backdoor esp32 steve ovens talk radio security questions privacy podcast open source media noah j. chelliah noah chelliah mind drip media linux questions linux getting started cloud call in show ask questions

About this Episode

This week the news of an "ESP backdroor" spread around the internet like wildfire. We dig into the technical details as to what happened, and what if any, the risk is.

-- During The Show --

00:52 Intro

  • Thank you for visiting at Scale
  • Weather
  • Cutting Silicon Wafers
  • YouTube Video

Sleuth - Live

09:15 HVAC follow up - Ziggy

21:49 Fedora on PI Boot Problems - Mark

  • Other people report Fedora "hangs" on Raspberry Pi 4
  • Try it on another pi
  • Raspberry Pi 5

27:16 News Wire

28:38 Software Freedom Conservancy Interview

  • Denver Gingerich - Director of Compliance
  • OpenWRT One
  • Powered over PoE
  • $10 of purchase price goes to OpenWRT
  • Target audience
  • Un-brickable
  • Made by BananaPi

36:10 Considering OpenWRT One

  • Steve for family?
  • On par with any consumer router
  • OpenWRT vs OPNSense
  • Very well put together

  • 39:35 ESP32 "Backdoor"

  • The basics

  • Wireless has to talk

  • What the company did

  • opcode3f

  • Undocumented Commands

    • 0xFC30 - Register Read
    • 0xFC31 - Register write
    • 0xFC32 - Set MAC Address
    • 0xFC07 - Write Flash
    • 0xFC08 - Read Flash
    • 0xFC0E - Send LMP Packet (different layers of the bluetooth stack)

  • What they are not telling you

  • Much to do about nothing

  • Ycombinator.com

  • Espressif Response

  • Dark Mentor

46:37 Vizio Lawsuit

  • SFC filed Oct 19 2021
  • Vizio tried to move the lawsuit
  • Going to trial in this year in Oct
  • SFC became a hardware manufacture to avoid fighting these lawsuits

51:00 Steve's eBook Tinkering

  • Started to help ChrisLAS
  • Extending the program

-- The Extra Credit Section --

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