description = [[
Attempts to query SNMP for a netstat like output.
]]
---
-- @output
-- | snmp-netstat:
-- | TCP 0.0.0.0:21 0.0.0.0:2256
-- | TCP 0.0.0.0:80 0.0.0.0:8218
-- | TCP 0.0.0.0:135 0.0.0.0:53285
-- | TCP 0.0.0.0:389 0.0.0.0:38990
-- | TCP 0.0.0.0:445 0.0.0.0:49158
-- | TCP 127.0.0.1:389 127.0.0.1:1045
-- | TCP 127.0.0.1:389 127.0.0.1:1048
-- | UDP 192.168.56.3:137 *:*
-- | UDP 192.168.56.3:138 *:*
-- | UDP 192.168.56.3:389 *:*
-- |_ UDP 192.168.56.3:464 *:*
author = "Patrik Karlsson"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.2
-- Created 01/19/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 04/11/2010 - v0.2 - moved snmp_walk to snmp library <patrik@cqure.net>
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Processes the table and creates the script output
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
-- @param prefix string containing either "UDP" or "TCP"
-- @param base_oid string containing the value of the base_oid of the walk
-- @return table suitable for <code>stdnse.format_output</code>
function process_answer( tbl, prefix, base_oid )
local new_tab = {}
for _, v in ipairs( tbl ) do
local lip = v.oid:match( "^" .. base_oid .. "%.(%d+%.%d+%.%d+%.%d+)") or ""
local lport = v.oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.(%d+)")
local fip = v.oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.%d+%.(%d+%.%d+%.%d+%.%d+)") or "*:*"
local fport = v.oid:match( "^" .. base_oid .. "%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.%d+%.(%d+)")
local value
if lport and lport ~= "0" then
lip = lip .. ":" .. lport
end
if fport and fport ~= "0" then
fip = fip .. ":" .. fport
end
value = string.format("%-20s %s", lip, fip )
table.insert( new_tab, string.format( "%-4s %s", prefix, value ) )
end
return new_tab
end
function table_merge( t1, t2 )
for _, v in ipairs(t2) do
table.insert(t1, v)
end
return t1
end
action = function(host, port)
local socket = nmap.new_socket()
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local tcp_oid = "1.3.6.1.2.1.6.13.1.1"
local udp_oid = "1.3.6.1.2.1.7.5.1.1"
local netstat = {}
local status, tcp, udp
socket:set_timeout(5000)
try(socket:connect(host, port))
status, tcp = snmp.snmpWalk( socket, tcp_oid )
if ( not(status) ) then return end
status, udp = snmp.snmpWalk( socket, udp_oid )
if ( not(status) ) then return end
socket:close()
if ( tcp == nil ) or ( #tcp == 0 ) or ( udp==nil ) or ( #udp == 0 ) then
return
end
tcp = process_answer(tcp, "TCP", tcp_oid)
udp = process_answer(udp, "UDP", udp_oid)
netstat = table_merge( tcp, udp )
nmap.set_port_state(host, port, "open")
socket:close()
return stdnse.format_output( true, netstat )
end
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