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local nmap = require "nmap"
local shortport = require "shortport"
local snmp = require "snmp"
local stdnse = require "stdnse"
description = [[
Attempts to enumerate Windows Shares through SNMP.
]]
---
-- @usage
-- nmap -sU -p 161 --script=snmp-win32-shares <target>
-- @output
-- | snmp-win32-shares:
-- | SYSVOL: C:\WINDOWS\sysvol\sysvol
-- | NETLOGON: C:\WINDOWS\sysvol\sysvol\inspectit-labb.local\SCRIPTS
-- |_ Webapps: C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\ROOT
--
-- @xmloutput
-- <elem key="SYSVOL">C:\WINDOWS\sysvol\sysvol</elem>
-- <elem key="NETLOGON">C:\WINDOWS\sysvol\sysvol\inspectit-labb.local\SCRIPTS</elem>
-- <elem key="Webapps">C:\Program Files\Apache Software Foundation\Tomcat 5.5\webapps\ROOT</elem>
author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
dependencies = {"snmp-brute"}
-- Version 0.3
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occur if a mib did not exist
-- Revised 04/11/2010 - v0.3 - moved snmp_walk to snmp library <patrik@cqure.net>
portrule = shortport.port_or_service(161, "snmp", "udp", {"open", "open|filtered"})
--- Gets a value for the specified oid
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
-- @param oid string containing the object id for which the value should be extracted
-- @return value of relevant type or nil if oid was not found
local function get_value_from_table( tbl, oid )
for _, v in ipairs( tbl ) do
if v.oid == oid then
return v.value
end
end
return nil
end
--- Processes the table and creates the script output
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
-- @return an output table with (sharename, path) pairs
local function process_answer( tbl )
local share_name = "1.3.6.1.4.1.77.1.2.27.1.1"
local share_path = "1.3.6.1.4.1.77.1.2.27.1.2"
local new_tbl = stdnse.output_table()
for _, v in ipairs( tbl ) do
if ( v.oid:match("^" .. share_name) ) then
local objid = v.oid:gsub( "^" .. share_name, share_path)
local path = get_value_from_table( tbl, objid )
new_tbl[v.value] = path
end
end
return new_tbl
end
action = function(host, port)
local data, snmpoid = nil, "1.3.6.1.4.1.77.1.2.27"
local shares = {}
local status
local snmpHelper = snmp.Helper:new(host, port)
snmpHelper:connect()
status, shares = snmpHelper:walk( snmpoid )
if (not(status)) or ( shares == nil ) or ( #shares == 0 ) then
return
end
shares = process_answer( shares )
nmap.set_port_state(host, port, "open")
return shares
end
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