smx smx-smx

Notes

Main CPU: rk3368
HW model and dts source: Rockchip PX5 EVB V11
MCU: STM32F091vct6 (256 Kbytes of Flash memory and 32 Kbytes of SRAM) datsheet

NEC 78K0 Flash Vulnerability

Overview

The microcontroller that I studied was removed from a Volkswagen car radio manufactured by Delco (now Delphi). The chip had only Delco markings on the package. It was decapsulated and the markings "NEC D78F0831Y" were found on the die. I reverse engineered the device definition files for the NEC toolchain (RA78K0) and determined that the uPD78F0831Y is a subset of a documented chip, the uPD78F0833Y. The '833Y adds 3 more timers, extended I2C functionality, and adds registers that allow firmware running on the '833Y to reprogram the flash ("self-programming"). Otherwise, the '831Y and '833Y are the same.

The uPD78F0831Y uses the NEC 78K0 core. Note that NEC (now Renesas) produced a number of incompatible cores with similar names such as 78K0S and 78K

	0810 b' from '
	0678 b' ssh2'
	00d8 b'%.48s:%.48s():%d (pid=%ld)\x00'
	0708 b'%s'
	0108 b'/usr/sbin/sshd\x00'
	0870 b'Accepted password for '
	01a0 b'Accepted publickey for '
	0c40 b'BN_bin2bn\x00'
	06d0 b'BN_bn2bin\x00'
	0958 b'BN_dup\x00'

	#!/usr/bin/env python

	r"""

	This script can be used to fix the "exec format error" seen with tools like gzip in
	WSL with Ubuntu 22.04 in Q1/Q2 2022

	A hacky fix for broken executables in WSL/Ubuntu 22.0
	see https://github.com/microsoft/WSL/issues/8219

	/*

	Utility to dump and restore a 24c256 eeprom.
	(Changing the defines it will work with other eeproms too.)

	Remember that 24c256 has 16 bit addressing.
	Smaller ones have 8 bit addressing.

	By Zibri.

	#!/bin/sh

	# Directory to store overlays in (one directory structure is created per overlay configured down below)
	OVERLAY_BASE=/home/root/overlays

	overlay() {
	set -e
	overlay_id="$(echo $1 \| sed 's;/;__;g')"
	unset TARGET SOURCE FSTYPE OPTIONS
	eval $(findmnt -P $1)

	meta:
	id: log2_int32
	title: Find the log base 2 of a 32-bit integer
	license: CC0-1.0
	doc-ref: https://graphics.stanford.edu/~seander/bithacks.html#IntegerLog
	# params:
	# - id: val
	# type: u4
	seq:
	- id: log2

-  public void sendOutlookMail() throws Exception {
-        String toEmail = "abc@xyz.com";
-        String fromEmail = "xyz@abc.com";
-        //register the text/calendar mime type
-        MimetypesFileTypeMap mimetypes = (MimetypesFileTypeMap) MimetypesFileTypeMap.getDefaultFileTypeMap();
-        mimetypes.addMimeTypes("text/calendar ics ICS");

	#include <ctype.h>
	#include <errno.h>
	#include <stdarg.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/stat.h>

	struct Archive

	//here is descriptors
	//needs interrupt endpoint 1 in, bulk endpoint 2 out, bulk endpoint 3 in
	//info from pl2303hx datasheet

	/* Device Descriptor */
	const USB_DEVICE_DESCRIPTOR device_dsc=
	{
	0x12, // Size of this descriptor in bytes
	USB_DESCRIPTOR_DEVICE, // DEVICE descriptor type
	0x0200, // USB Spec Release Number in BCD format