CVE-2026-42503 gopls 任意代码执行漏洞

import socket import sys # PoC for CVE-2026-42503: gopls Remote Code Execution via 0.0.0.0 binding # This script attempts to connect to a vulnerable gopls instance. TARGET_IP = "192.168.1.X" # Replace with the target IP address TARGET_PORT = 8080 # Replace with the vulnerable port def check_vulnerability(): print(f"[*] Attempting to connect to {TARGET_IP}:{TARGET_PORT}...") try: # Establish a TCP connection to the target s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((TARGET_IP, TARGET_PORT)) print("[+] Connection successful! The port is open.") # In a real exploit scenario, an attacker would send a malicious LSP payload # to trigger code execution. Below is a placeholder for the payload structure. # Example payload structure (conceptual): # payload = '{"jsonrpc":"2.0","id":1,"method":"textDocument/executeCommand","params":{"command":"exploit"}}' # s.send(payload.encode()) print("[!] Vulnerability confirmed: gopls is accessible externally.") print("[!] Further exploitation requires crafting specific LSP commands.") s.close() except socket.timeout: print("[-] Connection timed out. Target may be unreachable or firewall is active.") except ConnectionRefusedError: print("[-] Connection refused. Port may be closed or not listening on 0.0.0.0.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": check_vulnerability()