Denys Sedchenko x1unix

Hacking the SX Core modchip

Background

On October 2nd 2020, CVE-2020-15808 was publicly announced, detailing an out-of-bounds memory read/write vulnerability in STM's microcontroller firmware. Any chip containing STM's USB CDC driver library contains the bugged code, which represents a large amount of products on the market. While bugged STM libraries may be bad enough, this problem is much more widespread. Several companies manufacture "clones" of STM chips which, due to mostly identical MMIO (Memory Mapped Input/Output) addresses, fully support the affected STM vendor code. Most clone manufacturers don't offer their own libraries, so developers must either write their own from scratch, or they can use the STM's existing libraries, and most clone manufacturers encourage this.

Armed with this information, I became interested in exploiting and dumping the flash on the "Team Xecuter" SX Core modchip for the Nintendo Switch. The MCU used on the ch

Disable Device Enrolment Notification on MacOS in 4 easy steps

Attention: Doesn't seem to work. More investigation is necessary. Will update if able to fix.

1. Open Terminal.app

2. Copy the readonly plist file to your userspace

mkdir ~/Library/LaunchDaemons

Pairing Bluetooth Devices in Dual Boot with Linux Ubuntu and Windows 10/11

Introduction

This guide provides updated instructions for pairing Bluetooth devices (such as keyboards or mice) in a dual-boot environment with Linux Ubuntu and Windows 10/11, incorporating community feedback and suggestions.

Instructions

1. Pair in Linux First

Pair your Bluetooth device in Linux. This is crucial to ensure the LinkKey remains consistent.
Note: Do not re-pair the device in Linux after completing the pairing in Windows.

In /etc/default/grub, modify:

noibrs noibpb nopti nospectre_v2 nospectre_v1 l1tf=off nospec_store_bypass_disable no_stf_barrier mds=off tsx=on tsx_async_abort=off mitigations=off

Then sudo update-grub

from https:// make-linux-fast-again.com/ This domain does not seem to be maintained any longer.

It's the reply to the question raised by @getify on his twitter:

here's a variation on the question... will JS engines exhibit much performance difference between these two loops?

for (var i = 0; i < 100000000; i++) {
   // do some stuff, but not closure
}

for (let i = 0; i < 100000000; i++) {

Installing Network Manager on Raspbian 2020-02-05

NOTE:
This guide was written more than two years ago, which in Pi years means it's now graduated college, or something. Inevitably, it's at least a little out of date, and it may even be entirely misleading. There are several helpful suggestions in the comments (thanks everyone), and most recently a report that what's here plain doesn't work on current (early 2022) Raspbian. Which isn't even called 'Raspbian' any more.
As of Jan 2022 I'm partially back in my office-which-has-access-to-eduroam, and I do have a need to build up a fresh Pi desktop. If and when I get that working I'll update this guide. In the meantime: good luck, and please leave a comment to report success or failure.
(June 2022) Nope, I still haven't actually tried any of this myself. However, I have had to troubleshoot eduroam wifi on my Linux ThinkPad. As of Ubuntu 22.04 it would no longer connect. [This Stack Exchange answer](https://askubuntu.com/questions/27976

	#!/bin/bash
	#
	# ~/.local/bin/btswitch
	#

	# wait a second this is too fast for udev
	sleep 1

	btdev="$(pactl list sinks\|grep Name\|grep 'bluez.*.a2dp.sink'\|sed 's/Name: //'\|sed 's/\s//')"
	if [ -n "$btdev" ]; then

	import 'dart:async';
	import 'dart:convert';
	import 'dart:ffi';
	import 'dart:io';

	import 'package:ffi/ffi.dart';
	import 'package:win32/win32.dart';

	const healthOffset = 0x12FC58;

	sudo chroot /mnt/sysroot /bin/bash --login

	# set partition codes
	sgdisk -t 1:ef00 /dev/vda
	sgdisk -t 2:8304 /dev/vda
	partprobe

	# remove GRUB and exclude it from being reinstalled
	rpm -v --nodeps --erase $(rpm -qa \| grep "^grub2-\\|^os-prober-\\|^grubby-")
	echo "exclude=grub2-*,os-prober,grubby" >> /etc/dnf/dnf.conf

	import pygit2


	repo = pygit2.Repository(path='.')

	repo.index.add_all()
	repo.index.write()
	tree = repo.index.write_tree()
	parent, ref = repo.resolve_refish(refish=repo.head.name)
	repo.create_commit(