106 lines
3.4 KiB
Ruby
106 lines
3.4 KiB
Ruby
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
class MetasploitModule < Msf::Auxiliary
|
|
include Msf::Auxiliary::Report
|
|
include Msf::Auxiliary::UDPScanner
|
|
|
|
def initialize(info = {})
|
|
super(
|
|
update_info(
|
|
info,
|
|
'Name' => 'Moxa UDP Device Discovery',
|
|
'Description' => %q(
|
|
The Moxa protocol listens on 4800/UDP and will respond to broadcast
|
|
or direct traffic. The service is known to be used on Moxa devices
|
|
in the NPort, OnCell, and MGate product lines.
|
|
|
|
A discovery packet compels a Moxa device to respond to the sender
|
|
with some basic device information that is needed for more advanced
|
|
functions. The discovery data is 8 bytes in length and is the most
|
|
basic example of the Moxa protocol. It may be sent out as a
|
|
broadcast (destination 255.255.255.255) or to an individual device.
|
|
|
|
Devices that respond to this query may be vulnerable to serious
|
|
information disclosure vulnerabilities, such as CVE-2016-9361.
|
|
|
|
The module is the work of Patrick DeSantis of Cisco Talos and is
|
|
derived from original work by K. Reid Wightman. Tested and validated
|
|
on a Moxa NPort 6250 with firmware versions 1.13 and 1.15.
|
|
),
|
|
'Author' => 'Patrick DeSantis <p[at]t-r10t.com>',
|
|
'License' => MSF_LICENSE,
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2016-9361'],
|
|
[ 'URL', 'https://www.digitalbond.com/blog/2016/10/25/serial-killers/'],
|
|
[ 'URL', 'http://www.moxa.com/support/faq/faq_detail.aspx?id=646' ],
|
|
]
|
|
)
|
|
)
|
|
|
|
register_options(
|
|
[
|
|
# Moxa protocol listens on 4800/UDP by default
|
|
Opt::RPORT(4800)
|
|
])
|
|
end
|
|
|
|
# The data to be sent via UDP
|
|
def build_probe
|
|
# Function Code (first byte) 0x01: Moxa discovery/identify
|
|
# The fourth byte is the length of the full data payload
|
|
@probe ||= "\x01\x00\x00\x08\x00\x00\x00\x00"
|
|
end
|
|
|
|
# Called for each response packet
|
|
def scanner_process(response, src_host, _src_port)
|
|
# The first byte of a response will always be the func code + 0x80
|
|
# (the most significant bit of the byte is set to 1, so 0b00000001
|
|
# becomes 0b10000001, or 0x81).
|
|
# A valid response is 24 bytes, starts with 0x81, and contains the values
|
|
# 0x00, 0x90, 0xe8 (the Moxa OIU) in bytes 14, 15, and 16.
|
|
return unless response[0] == "\x81" && response[14..16] == "\x00\x90\xe8" && response.length == 24
|
|
@results[src_host] ||= []
|
|
@results[src_host] << response
|
|
end
|
|
|
|
# Called after the scan block
|
|
def scanner_postscan(_batch)
|
|
@results.each_pair do |host, response|
|
|
peer = "#{host}:#{rport}"
|
|
|
|
# Report the host
|
|
report_host(
|
|
:host => host,
|
|
:info => "Moxa Device",
|
|
)
|
|
|
|
# Report the service
|
|
report_service(
|
|
host: host,
|
|
proto: 'udp',
|
|
port: rport,
|
|
name: 'Moxa Protocol',
|
|
)
|
|
|
|
if response.empty?
|
|
vprint_status("#{peer} No Moxa Devices Found.")
|
|
else
|
|
print_good("#{peer} Moxa Device Found!")
|
|
|
|
# Report vuln
|
|
report_vuln(
|
|
host: host,
|
|
port: rport,
|
|
proto: 'udp',
|
|
name: 'Moxa Protocol Use',
|
|
refs: references
|
|
)
|
|
end
|
|
end
|
|
end
|
|
end
|