mattiasgustavsson

// color1 and color2 are R4G4B4 12bit RGB color values, alpha is 0-255
uint16_t blend_12bit( uint16_t color1, uint16_t color2, uint8_t alpha ) {
	uint64_t c1 = (uint64_t) color1;
	uint64_t c2 = (uint64_t) color2;
	uint64_t a = (uint64_t)( alpha >> 4 );
	// bit magic to alpha blend R G B with single mul
	c1 = ( c1 | ( c1 << 12 ) ) & 0x0f0f0f;
	c2 = ( c2 | ( c2 << 12 ) ) & 0x0f0f0f;
	uint32_t o = ( ( ( ( c2 - c1 ) * a ) >> 4 ) + c1 ) & 0x0f0f0f;

wh1te4ever

//
//  ViewController.m
//  JBDetectTest
//
//  Created by seo on 3/27/25.
//

#import "ViewController.h"
#import <dlfcn.h>

justtryingthingsout

S3_3_c4_c5_0 at min EL0: DSPSR
S3_3_c4_c5_1 at min EL0: DLR
S3_6_c4_c0_0 at min EL3: SPSR_EL3
S3_6_c4_c0_1 at min EL3: ELR_EL3
S3_1_c0_c0_0 at min EL1: CCSIDR_EL1
S3_6_c1_c0_0 at min EL3: SCTLR_EL3
S3_6_c1_c0_1 at min EL3: ACTLR_EL3
S3_6_c1_c1_2 at min EL3: CPTR_EL3
S3_6_c1_c1_0 at min EL3: SCR_EL3
S3_6_c1_c3_1 at min EL3: MDCR_EL3

sroettger

IERAE CTF 2024 - Intel CET Bypass Challenge

IERAE CTF had one of the coolest pwn challenges I've done in the while. It was written by hugeh0ge.

Here's the full source:

// gcc chal.c -fno-stack-protector -static -o chal
#include <stdio.h>
#include 

theevilbit

#!/bin/bash

# Run the lsregister command and store the output in a variable
output=$(/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -dump)

# Use awk to parse the relevant sections
echo "$output" | awk '
    # When "CFBundleDisplayName" is found, store the app name
    /CFBundleDisplayName/ {
        app_name = substr($0, index($0, "=") + 2)

LuisEGR

# Download and install Git for Windows if not already installed
if (-not (Test-Path "C:\Program Files\Git\bin\git.exe")) {
    Write-Host "Git for Windows not found. Downloading installer..."
    Invoke-WebRequest -Uri "https://github.com/git-for-windows/git/releases/download/v2.31.1.windows.1/Git-2.31.1-64-bit.exe" -OutFile "git-installer.exe"
    Write-Host "Installing Git for Windows..."
    Start-Process -FilePath ".\git-installer.exe" -ArgumentList "/VERYSILENT" -Wait
    Remove-Item ".\git-installer.exe"
}

# Create a temporary directory for downloads

mistymntncop

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <windows.h>

#include "nt_crap.h"

#define ArrayCount(arr) (sizeof(arr)/sizeof(arr[0]))
#define assert(expr) if(!(expr)) { *(char*)0 = 0; }

DavidBuchanan314

"""
31-round sha256 collision.

Not my research, just a PoC script I put together with numbers plugged in from the slide at
https://twitter.com/jedisct1/status/1772647350554464448 from FSE2024

SHA256 impl follows FIPS 180-4
https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf
"""

p-mng

Uninstall Rosetta 2 on macOS

1. Disable SIP (System Integrity Protection)

1. Boot into recovery
2. Open a terminal (Utilities > Terminal)
3. Disable SIP using csrutil disable (confirm the prompt with y)
4. Reboot into macOS

2. Uninstall Rosetta

syneart

### Test on https://github.com/yousseb/meld/releases/tag/osx-20
### OSX - 3.21.0 (r4) Sonoma
### !!! Note: You need put the Meld.app r4 build to the /Applications path first.

#!/bin/zsh

#Fix libpng16.16.dylib not found
install_name_tool -change /usr/local/opt/libpng/lib/libpng16.16.dylib @executable_path/../Frameworks/libpng16.16.dylib /Applications/Meld.app/Contents/Frameworks/libfreetype.6.20.0.dylib

#Fix libbrotlidec.1.dylib not found