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