111 lines
2.9 KiB
Plaintext
111 lines
2.9 KiB
Plaintext
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local brute = require "brute"
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local shortport = require "shortport"
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local stdnse = require "stdnse"
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local string = require "string"
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local http = require "http"
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local creds = require "creds"
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description = [[
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Performs brute force username and password auditing against
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Metasploit msgrpc interface.
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]]
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---
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-- @usage
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-- nmap --script metasploit-msgrpc-brute -p 55553 <host>
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--
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-- This script uses brute library to perform password
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-- guessing against Metasploit's msgrpc interface.
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--
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--
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-- @output
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-- PORT STATE SERVICE REASON
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-- 55553/tcp open unknown syn-ack
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-- | metasploit-msgrpc-brute:
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-- | Accounts
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-- | root:root - Valid credentials
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-- | Statistics
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-- |_ Performed 10 guesses in 10 seconds, average tps: 1
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author = "Aleksandar Nikolic"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"intrusive", "brute"}
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portrule = shortport.port_or_service(55553,"metasploit-msgrpc")
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-- returns a "prefix" that msgpack uses for strings
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local get_prefix = function(data)
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if #data <= 31 then
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return string.pack("B", 0xa0 + #data)
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else
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return "\xda" .. string.pack(">I2", #data)
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end
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end
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-- simple function that implements basic msgpack encoding we need for this script
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-- see http://wiki.msgpack.org/display/MSGPACK/Format+specification for more
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local encode = function(username, password)
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return "\x93\xaaauth.login" .. get_prefix(username) .. username .. get_prefix(password) .. password
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end
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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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-- as we are using http methods, no need for connect and disconnect
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-- this might cause a problem as in other scripts that don't have explicit connect
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-- as there is no way to "reserve" a socket
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connect = function( self )
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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 data
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local options = {
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header = {
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["Content-Type"] = "binary/message-pack"
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}
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}
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stdnse.debug1( "Trying %s/%s ...", user, pass )
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data = http.post(self.host,self.port, "/api/",options, nil , encode(user,pass))
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if data and data.status and tostring( data.status ):match( "200" ) then
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if string.find(data.body,"success") then
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return true, creds.Account:new( user, pass, creds.State.VALID)
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else
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return false, brute.Error:new( "Incorrect username or password" )
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end
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end
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local err = brute.Error:new("Login didn't return a proper response")
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err:setRetry( true )
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return false, err
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end,
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disconnect = function( self )
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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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engine.options.firstonly = true
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engine.max_threads = 3
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engine.max_retries = 10
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status, result = engine:start()
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return result
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end
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