I once met a person that never drank water, only soft drinks. It’s not the unhealthiness of this that disturbed me, but the fact they did it without the requisite paperwork.

Unlike those disorganised people I have a formal waiver. I primarily drink steam and crushed glaciers.

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Joined 2 years ago
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Cake day: June 14th, 2023

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  • Bleepingcomputer’s title and article are very misleading, the presentation did NOT reveal a backdoor into an ESP32. It looks like Bleepingcomputer completely misunderstood what was presented (EDIT: and tarlogic isn’t helping with the first sentence on their site).

    Instead the presentation was about using an ESP32 as a tool to attack other devices. Additionally they discovered some undocumented commands that you can send from the ESP32 processor to the ESP32 radio peripheral that let you take control of it and potentially send some extra forms of traffic that could be useful. They did NOT present anything about the ESP32 bluetooth radio being externally attackable.

    Another perspective that might help: imagine you have a cheap bluetooth chipset that is open source and well documented. That would give you more than what the presentation just found. Would Bleepingcomputer then be reporting it’s a backdoor threatening millions of devices?










  • I was going to reply with “you can’t use barbed fittings at high pressures”, but I looked it up and found some claiming 150psi (10 atmospheres). Huh. Perhaps this did start life as a hydraulic cylinder that has had some parts lopped off.

    Not sure what the tube is filled with, but it looks like a lot of corrosion.

    I don’t think it’s built up corrosion. The pipe is steel and corrodes to red/brown iron oxide, as visible around the circumference at the end. The green colour in the filling is not an iron oxide. It might be a copper oxide, or some dye in the white material.



  • Anything odd with temperatures or power draws perhaps? nv-top shows both for me (but I run an AMD GPU + non-proprietary drivers), otherwise lm-sensors might be good.

    nvtop seems to show normal usage

    Neither the GPU nor CPU utilisation change at the 30 min mark? If one is pegged at 100% then it’s probably hard to work out what is going on. Running a singleplayer game staring at a wall and configured with limited framrate might let you run both the CPU and GPU at less than 100%, perhaps making it easier to see if one or the other suddenly changes.


  • The rough (frit) glaze surface would be the opposite of what you want in a HV bushing, because they would wick and store conductive water.

    Interestingly it’s on the both the top and the bottom. Perhaps this high surface area makes it more compatible with some specific glues; allowing you to stack a pile of these pieces together to make a full bushing? That might also explain why there is not hole in the middle, this could be a compression style bushing stack for holding wires up in the air off a surface.