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85066093de
Rewriten original ftp-brute.nse script to use brute library to perform password guessing.
122 lines
3.0 KiB
Lua
122 lines
3.0 KiB
Lua
description = [[
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Performs brute force password auditing against FTP servers.
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Based on old ftp-brute.nse script by Diman Todorov, Vlatko Kosturjak and Ron Bowes.
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]]
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---
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-- @usage
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-- nmap --script ftp-brute -p 21 <host>
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--
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-- This script uses brute library to perform password
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-- guessing.
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--
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-- @output
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-- PORT STATE SERVICE
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-- 21/tcp open ftp
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-- | my-ftp-brute:
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-- | Accounts
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-- | root:root - Valid credentials
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-- | Statistics
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-- |_ Performed 510 guesses in 610 seconds, average tps: 0
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--
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-- @args timeout the amount of secounds to wait for a response on the socket.
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-- Lowering this value may result in a higher throughput for servers
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-- having a delayed response on incorrect login attempts. (default: 5)
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author = "Aleksandar Nikolic"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"intrusive", "brute"}
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require 'shortport'
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require 'brute'
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require 'creds'
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portrule = shortport.port_or_service(21, "ftp")
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local arg_timeout = stdnse.get_script_args(SCRIPT_NAME .. ".timeout") or 5
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Driver = {
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new = function(self, host, port)
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local o = {}
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setmetatable(o, self)
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self.__index = self
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o.host = host
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o.port = port
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return o
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end,
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connect = function( self )
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self.socket = nmap.new_socket()
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status, err = self.socket:connect(self.host, self.port)
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self.socket:set_timeout(tonumber(arg_timeout) * 1000)
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if(not(status)) then
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return false, brute.Error:new( "Couldn't connect to host: " .. err )
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end
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return true
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end,
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login = function (self, user, pass)
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local status, err
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local res = ""
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status, err = self.socket:send("USER " .. user .. "\r\n")
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if(not(status)) then
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return false, brute.Error:new("Couldn't send login: " .. err)
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end
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status, err = self.socket:send("PASS " .. pass .. "\n\n")
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if(not(status)) then
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return false, brute.Error:new("Couldn't send login: " .. err)
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end
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-- Create a buffer and receive the first line
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local buffer = stdnse.make_buffer(self.socket, "\r?\n")
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local line = buffer()
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-- Loop over the lines
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while(line)do
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stdnse.print_debug("Received: %s", line)
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if(string.match(line, "^230")) then
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stdnse.print_debug(1, "ftp-brute: Successful login: %s/%s", user, pass)
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return true, brute.Account:new( user, pass, creds.State.VALID)
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elseif(string.match(line, "^530")) then
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return false, brute.Error:new( "Incorrect password" )
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elseif(string.match(line, "^220")) then
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elseif(string.match(line, "^331")) then
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else
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stdnse.print_debug(1, "ftp-brute: WARNING: Unhandled response: %s", line)
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local err = brute.Error:new("Unhandled response")
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err:setRetry(true)
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return false, err
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end
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line = buffer()
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end
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return false, brute.Error:new("Login didn't return a proper response")
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end,
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disconnect = function( self )
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self.socket:close()
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return true
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end
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}
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action = function( host, port )
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local status, result
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local engine = brute.Engine:new(Driver, host, port)
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engine.options.script_name = SCRIPT_NAME
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status, result = engine:start()
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return result
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end
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