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nmap/scripts/snmp-win32-users.nse
patrik d2e54f0bf2 o [NSE] Added a new library for ASN.1 parsing and adapted the SNMP library to
make use of it. Added 5 scripts that use the new libraries:
  - snmp-netstat shows listening and connected sockets
  - snmp-processes shows process information including name, pid, path and 
    parameters
  - snmp-win32-services shows the names of running Windows services
  - snmp-win32-shares shows the names and path of Windows shares
  - snmp-win32-software shows a list of installed Windows software
  - snmp-win32-users shows a list of local Windows users
2010-02-16 09:15:38 +00:00

119 lines
2.5 KiB
Lua

description = [[
Attempts to enumerate User Accounts through SNMP
]]
---
-- @output
-- | snmp-win32-users:
-- | Administrator
-- | Guest
-- | IUSR_EDUSRV011
-- | IWAM_EDUSRV011
-- | SUPPORT_388945a0
-- | Tomcat
-- | db2admin
-- | ldaptest
-- |_ patrik
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 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/19/2010 - v0.2 - fixed loop that would occure if a mib did not exist
require "shortport"
require "snmp"
portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
--- Walks the MIB Tree
--
-- @param socket socket already connected to the server
-- @base_oid string containing the base object ID to walk
-- @return table containing <code>oid</code> and <code>value</code>
function snmp_walk( socket, base_oid )
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmp_table = {}
local oid = base_oid
while ( true ) do
local value, response, snmpdata, options, item = nil, nil, nil, {}, {}
options.reqId = 28428 -- unnecessary?
payload = snmp.encode( snmp.buildPacket( snmp.buildGetNextRequest(options, oid) ) )
try(socket:send(payload))
response = try( socket:receive_bytes(1) )
snmpdata = snmp.fetchResponseValues( response )
value = snmpdata[1][1]
oid = snmpdata[1][2]
if not oid:match( base_oid ) or base_oid == oid then
break
end
item.oid = oid
item.value = value
table.insert( snmp_table, item )
end
socket:close()
snmp_table.baseoid = base_oid
return snmp_table
end
--- Processes the table and creates the script output
--
-- @param tbl table containing <code>oid</code> and <code>value</code>
-- @return table suitable for <code>stdnse.format_output</code>
function process_answer( tbl )
local new_tab = {}
for _, v in ipairs( tbl ) do
table.insert( new_tab, v.value )
end
table.sort( new_tab )
return new_tab
end
action = function(host, port)
local socket = nmap.new_socket()
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local snmpoid = "1.3.6.1.4.1.77.1.2.25"
local users = {}
socket:set_timeout(5000)
try(socket:connect(host.ip, port.number, "udp"))
users = snmp_walk( socket, snmpoid )
users = process_answer( users )
if ( users == nil ) or ( #users == 0 ) then
return
end
nmap.set_port_state(host, port, "open")
return stdnse.format_output( true, users )
end