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 -- nmap -sU -p 500 --script ike-version -- -- @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