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local nmap = require "nmap"
local stdnse = require "stdnse"
local shortport = require "shortport"
local table = require "table"
local ike = require "ike"
description=[[
Obtains information (such as vendor and device type where available) from an IKE service by sending four packets to the host. This scripts tests with both Main and Aggressive Mode and sends multiple transforms per request.
]]
---
-- @usage
-- nmap -sU -sV -p 500 <target>
-- nmap -sU -p 500 --script ike-version <target>
--
-- @output
-- PORT STATE SERVICE REASON VERSION
-- 500/udp open isakmp udp-response Cisco VPN Concentrator 3000 4.0.7
-- Service Info: OS: pSOS+; Device: VPN; CPE: cpe:/h:cisco:concentrator
---
author = "Jesper Kueckelhahn"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe", "version"}
portrule = shortport.port_or_service(500, "isakmp", "udp")
-- Test different methods for getting version
--
local function get_version(host, port)
local packet, version, t
local auth = {"psk", "rsa", "Hybrid", "XAUTH"}
local encryption = {"des", "3des", "aes/128", "aes/192", "aes/256"}
local hash = {"md5", "sha1"}
local group = {"768", "1024", "1536"}
-- generate transforms
t = {}
for h,a in pairs(auth) do
for i,e in pairs(encryption) do
for j,h in pairs(hash) do
for k,g in pairs(group) do
table.insert(t, { ['auth'] = a, ['encryption'] = e, ['hash'] = h, ['group'] = g});
end
end
end
end
-- try aggressive mode (diffie hellman group 2)
local diffie = 2
stdnse.print_debug(1, "Sending Aggressive mode packet ...")
packet = ike.request(port.number, port.protocol, 'Aggressive', t, diffie, 'vpngroup')
version = ike.send_request(host, port, packet)
if version.success then
return version
end
stdnse.print_debug(1, "Aggressive mode (dh 2) failed")
-- try aggressive mode (diffie hellman group 1)
diffie = 1
stdnse.print_debug(1, "Sending Aggressive mode packet ...")
packet = ike.request(port.number, port.protocol, 'Aggressive', t, diffie, 'vpngroup')
version = ike.send_request(host, port, packet)
if version.success then
return version
end
stdnse.print_debug(1, "Aggressive mode (dh 1) failed")
-- try aggressive mode (diffie hellman group 2, no id)
-- some checkpoint devices respond to this
local diffie = 2
stdnse.print_debug(1, "Sending Aggressive mode packet ...")
packet = ike.request(port.number, port.protocol, 'Aggressive', t, diffie, '')
version = ike.send_request(host, port, packet)
if version.success then
return version
end
stdnse.print_debug(1, "Aggressive mode (dh 2, no id) failed")
-- try main mode
stdnse.print_debug(1, "Sending Main mode packet ...")
packet = ike.request(port.number, port.protocol, 'Main', t, '')
version = ike.send_request(host, port, packet)
if version.success then
return version
end
stdnse.print_debug(1, "Main mode failed")
stdnse.print_debug(1, "Version detection not possible")
return false
end
action = function( host, port )
local ike_response = get_version(host, port)
if ike_response then
-- Extra information found in the response. Kept for future reference.
-- local mode = ike_response['mode']
-- local vids = ike_response['vids']
local info = ike_response['info']
if info.vendor ~= nil then
port.version.product = info.vendor.vendor
port.version.version = info.vendor.version
port.version.ostype = info.vendor.ostype
port.version.devicetype = info.vendor.devicetype
table.insert(port.version.cpe, info.vendor.cpe)
nmap.set_port_version(host, port, "hardmatched")
nmap.set_port_state(host, port, "open")
end
end
stdnse.print_debug(1, "Version: %s", port.version.product )
return
end
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