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Diffstat (limited to '')
| -rw-r--r-- | scripts/broadcast-rip-discover.nse | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/scripts/broadcast-rip-discover.nse b/scripts/broadcast-rip-discover.nse new file mode 100644 index 0000000..1aa19dd --- /dev/null +++ b/scripts/broadcast-rip-discover.nse @@ -0,0 +1,181 @@ +local ipOps = require "ipOps" +local nmap = require "nmap" +local stdnse = require "stdnse" +local string = require "string" +local tab = require "tab" +local table = require "table" + +description=[[ +Discovers hosts and routing information from devices running RIPv2 on the +LAN. It does so by sending a RIPv2 Request command and collects the responses +from all devices responding to the request. +]] + +--- +-- @usage +-- nmap --script broadcast-rip-discover +-- +-- @output +-- Pre-scan script results: +-- | broadcast-rip-discover: +-- | Discovered RIPv2 devices +-- | 10.0.200.107 +-- | ip netmask nexthop metric +-- | 10.46.100.0 255.255.255.0 0.0.0.0 1 +-- | 10.46.110.0 255.255.255.0 0.0.0.0 1 +-- | 10.46.120.0 255.255.255.0 0.0.0.0 1 +-- | 10.46.123.0 255.255.255.0 10.0.200.123 1 +-- | 10.46.124.0 255.255.255.0 10.0.200.124 1 +-- | 10.46.125.0 255.255.255.0 10.0.200.125 1 +-- | 10.0.200.101 +-- | ip netmask nexthop metric +-- |_ 0.0.0.0 0.0.0.0 10.0.200.1 1 +-- +-- @args broadcast-rip-discover.timeout timespec defining how long to wait for +-- a response. (default 5s) + +-- +-- Version 0.1 +-- Created 29/10/2011 - v0.1 - created by Patrik Karlsson <patrik@cqure.net> +-- + +author = "Patrik Karlsson" +license = "Same as Nmap--See https://nmap.org/book/man-legal.html" +categories = {"broadcast", "safe"} + + +prerule = function() return not( nmap.address_family() == "inet6") end + +RIPv2 = { + + Command = { + Request = 1, + Response = 2, + }, + + AddressFamily = { + IP = 2, + }, + + -- The Request class contains functions to build a RIPv2 Request + Request = { + + -- Creates a new Request instance + -- + -- @param command number containing the RIPv2 Command to use + -- @return o instance of request + new = function(self, command) + local o = { + version = 2, + command = command, + domain = 0, + family = 0, + tag = 0, + address = 0, + subnet = 0, + nexthop = 0, + metric = 16 + } + setmetatable(o, self) + self.__index = self + return o + end, + + -- Converts the whole request to a string + __tostring = function(self) + assert(self.command, "No command was supplied") + assert(self.metric, "No metric was supplied") + assert(self.address, "No address was supplied") + local RESERVED = 0 + -- RIPv2 stuff, should be 0 for RIPv1 + local tag, subnet, nexthop = 0, 0, 0 + + local data = string.pack(">BB I2 I2 I2 I4 I4 I4 I4", + self.command, self.version, self.domain, self.family, self.tag, + self.address, self.subnet, self.nexthop, self.metric) + + return data + end, + + }, + + -- The Response class contains code needed to parse a RIPv2 response + Response = { + + -- Creates a new Response instance based on raw socket data + -- + -- @param data string containing the raw socket response + -- @return o Response instance + new = function(self, data) + local o = { data = data } + + if ( not(data) or #data < 3 ) then + return + end + local pos, _ + o.command, o.version, _, pos = string.unpack(">BBI2", data) + if ( o.command ~= RIPv2.Command.Response or o.version ~= 2 ) then + return + end + + local routes = tab.new(2) + tab.addrow(routes, "ip", "netmask", "nexthop", "metric") + + while( #data - pos >= 20 ) do + local family, address, metric, netmask, nexthop + family, _, address, netmask, nexthop, + metric, pos = string.unpack(">I2 I2 I4 I4 I4 I4", data, pos) + + if ( family == RIPv2.AddressFamily.IP ) then + local ip = ipOps.fromdword(address) + netmask = ipOps.fromdword(netmask) + nexthop = ipOps.fromdword(nexthop) + tab.addrow(routes, ip, netmask, nexthop, metric) + end + end + + if ( #routes > 1 ) then o.routes = routes end + + setmetatable(o, self) + self.__index = self + return o + end, + + } + +} + + +action = function() + local timeout = stdnse.parse_timespec(stdnse.get_script_args('broadcast-rip-discover.timeout')) + timeout = (timeout or 5) * 1000 + + local socket = nmap.new_socket("udp") + socket:set_timeout(timeout) + + local rip = RIPv2.Request:new(RIPv2.Command.Request) + local status, err = socket:sendto("224.0.0.9", + { number = 520, protocol = "udp" }, + tostring(rip)) + local result = {} + repeat + local data + status, data = socket:receive() + if ( status ) then + local status, _, _, rhost, _ = socket:get_info() + local response = RIPv2.Response:new(data) + table.insert(result, rhost) + + if ( response and response.routes and #response.routes > 0 ) then + --response.routes.name = "Routes" + table.insert(result, { tab.dump(response.routes) } ) + end + + end + until( not(status) ) + + if ( #result > 0 ) then + result.name = "Discovered RIPv2 devices" + end + return stdnse.format_output(true, result) +end |