local brute = require "brute" local creds = require "creds" local shortport = require "shortport" local stdnse = require "stdnse" local rsync = stdnse.silent_require "rsync" description = [[ Performs brute force password auditing against the rsync remote file syncing protocol. ]] --- -- @usage -- nmap -p 873 --script rsync-brute --script-args 'rsync-brute.module=www' -- -- @output -- PORT STATE SERVICE REASON -- 873/tcp open rsync syn-ack -- | rsync-brute: -- | Accounts -- | user1:laptop - Valid credentials -- | user2:password - Valid credentials -- | Statistics -- |_ Performed 1954 guesses in 20 seconds, average tps: 97 -- -- @args rsync-brute.module - the module against which brute forcing should be performed author = "Patrik Karlsson" license = "Same as Nmap--See https://nmap.org/book/man-legal.html" categories = {"brute", "intrusive"} portrule = shortport.port_or_service(873, "rsync", "tcp") Driver = { new = function(self, host, port, options) local o = { host = host, port = port, options = options } setmetatable(o, self) self.__index = self return o end, connect = function(self) self.helper = rsync.Helper:new(self.host, self.port, self.options) return self.helper:connect() end, login = function(self, username, password) local status, data = self.helper:login(username, password) -- retry unless we have an authentication failed error if( not(status) and data ~= "Authentication failed" ) then local err = brute.Error:new( data ) err:setRetry( true ) return false, err elseif ( not(status) ) then return false, brute.Error:new( "Login failed" ) else return true, creds.Account:new(username, password, creds.State.VALID) end end, disconnect = function( self ) return self.helper:disconnect() end } local function isModuleValid(host, port, module) local helper = rsync.Helper:new(host, port, { module = module }) if ( not(helper) ) then return false, "Failed to create helper" end local status, data = helper:connect() if ( not(status) ) then return false, "Failed to connect to server" end status, data = helper:login() if ( status and data == "No authentication was required" ) then return false, data elseif ( not(status) and data == "Authentication required" ) then return true elseif ( not(status) and data == ("Unknown module '%s'"):format(module) ) then return false, data end return false, ("Brute pre-check failed for unknown reason: (%s)"):format(data) end local function fail (err) return stdnse.format_output(false, err) end action = function(host, port) local mod = stdnse.get_script_args(SCRIPT_NAME .. ".module") if ( not(mod) ) then return fail("rsync-brute.module was not supplied") end local status, err = isModuleValid(host, port, mod) if ( not(status) ) then return fail(err) end local engine = brute.Engine:new(Driver, host, port, { module = mod }) engine.options.script_name = SCRIPT_NAME local result status, result = engine:start() return result end