3 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 # Copyright (c) 2019 Kristof Provost <kp@FreeBSD.org>
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
10 # 1. Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # 2. Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in the
14 # documentation and/or other materials provided with the distribution.
16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 import scapy.all as sp
31 from sniffer import Sniffer
33 def check_icmp_error(args, packet):
34 ip = packet.getlayer(sp.IP)
37 if ip.dst != args.to[0]:
40 icmp = packet.getlayer(sp.ICMP)
43 if icmp.type != 3 or icmp.code != 3:
49 parser = argparse.ArgumentParser("CVE-2019-icmp.py",
50 description="CVE-2019-icmp test tool")
51 parser.add_argument('--sendif', nargs=1,
53 help='The interface through which the packet will be sent')
54 parser.add_argument('--recvif', nargs=1,
56 help='The interface on which to check for the packet')
57 parser.add_argument('--src', nargs=1,
59 help='The source IP address')
60 parser.add_argument('--to', nargs=1,
62 help='The destination IP address')
64 args = parser.parse_args()
66 # Send the allowed packet to establish state
68 sp.IP(src=args.src[0], dst=args.to[0]) / \
69 sp.UDP(dport=53, sport=1234)
70 sp.sendp(udp, iface=args.sendif[0], verbose=False)
72 # Start sniffing on recvif
73 sniffer = Sniffer(args, check_icmp_error)
75 # Send the bad error packet
76 icmp_reachable = sp.Ether() / \
77 sp.IP(src=args.src[0], dst=args.to[0]) / \
78 sp.ICMP(type=3, code=3) / \
79 sp.IP(src="4.3.2.1", dst="1.2.3.4") / \
80 sp.UDP(dport=53, sport=1234)
81 sp.sendp(icmp_reachable, iface=args.sendif[0], verbose=False)
84 if sniffer.foundCorrectPacket:
89 if __name__ == '__main__':