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local afp = require "afp"
local nmap = require "nmap"
local shortport = require "shortport"
local stdnse = require "stdnse"
local string = require "string"
local table = require "table"
local unpwdb = require "unpwdb"
-- we don't really need openssl here, but let's attempt to load it as a way
-- to simply prevent the script from running, in case we don't have it
local openssl = stdnse.silent_require("openssl")
description = [[
Performs password guessing against Apple Filing Protocol (AFP).
]]
---
-- @usage
-- nmap -p 548 --script afp-brute <host>
--
-- @output
-- PORT STATE SERVICE
-- 548/tcp open afp
-- | afp-brute:
-- |_ admin:KenSentMe => Valid credentials
-- Information on AFP implementations
--
-- Snow Leopard
-- ------------
-- - Delay 10 seconds for accounts with more than 5 incorrect login attempts (good)
-- - Instant response if password is successful
--
-- Netatalk
-- --------
-- - Netatalk responds with a "Parameter error" when the username is invalid
--
author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"intrusive", "brute"}
-- Version 0.3
-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 03/09/2010 - v0.2 - changed so that passwords are iterated over users
-- - this change makes better sense as guessing is slow
-- Revised 09/09/2011 - v0.3 - changed account status text to be more consistent with other *-brute scripts
portrule = shortport.port_or_service(548, "afp")
action = function( host, port )
local result, response, status = {}, nil, nil
local valid_accounts, found_users = {}, {}
local helper
local usernames, passwords
status, usernames = unpwdb.usernames()
if not status then return end
status, passwords = unpwdb.passwords()
if not status then return end
for password in passwords do
for username in usernames do
if ( not(found_users[username]) ) then
helper = afp.Helper:new()
status, response = helper:OpenSession( host, port )
if ( not(status) ) then
stdnse.debug1("OpenSession failed")
return
end
stdnse.debug1("Trying %s/%s ...", username, password)
status, response = helper:Login( username, password )
-- if the response is "Parameter error." we're dealing with Netatalk
-- This basically means that the user account does not exist
-- In this case, why bother continuing? Simply abort and thank Netatalk for the fish
if response:match("Parameter error.") then
stdnse.debug1("Netatalk told us the user does not exist! Thanks.")
-- mark it as "found" to skip it
found_users[username] = true
end
if status then
-- Add credentials for other afp scripts to use
if nmap.registry.afp == nil then
nmap.registry.afp = {}
end
nmap.registry.afp[username]=password
found_users[username] = true
table.insert( valid_accounts, string.format("%s:%s => Valid credentials", username, password:len()>0 and password or "<empty>" ) )
break
end
helper:CloseSession()
end
end
usernames("reset")
end
local output = stdnse.format_output(true, valid_accounts)
return output
end
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