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local brute = require "brute"
local creds = require "creds"
local redis = require "redis"
local shortport = require "shortport"
local stdnse = require "stdnse"
description = [[
Performs brute force passwords auditing against a Redis key-value store.
]]
---
-- @usage
-- nmap -p 6379 <ip> --script redis-brute
--
-- @output
-- PORT STATE SERVICE
-- 6379/tcp open unknown
-- | redis-brute:
-- | Accounts
-- | toledo - Valid credentials
-- | Statistics
-- |_ Performed 5000 guesses in 3 seconds, average tps: 1666
--
--
author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"intrusive", "brute"}
portrule = shortport.port_or_service(6379, "redis")
local function fail(err) return stdnse.format_output(false, err) end
Driver = {
new = function(self, host, port)
local o = { host = host, port = port }
setmetatable(o, self)
self.__index = self
return o
end,
connect = function( self )
self.helper = redis.Helper:new(self.host, self.port)
return self.helper:connect(brute.new_socket())
end,
login = function( self, username, password )
local status, response = self.helper:reqCmd("AUTH", password)
-- some error occurred, attempt to retry
if ( status and response.type == redis.Response.Type.ERROR and
"-ERR invalid password" == response.data ) then
return false, brute.Error:new( "Incorrect password" )
elseif ( status and response.type == redis.Response.Type.STATUS and
"+OK" ) then
return true, creds.Account:new( "", password, creds.State.VALID)
else
local err = brute.Error:new( response.data )
err:setRetry( true )
return false, err
end
end,
disconnect = function(self)
return self.helper:close()
end,
}
local function checkRedis(host, port)
local helper = redis.Helper:new(host, port)
local status = helper:connect()
if( not(status) ) then
return false, "Failed to connect to server"
end
local status, response = helper:reqCmd("INFO")
if ( not(status) ) then
return false, "Failed to request INFO command"
end
if ( redis.Response.Type.ERROR == response.type ) then
if ( "-ERR operation not permitted" == response.data ) or
( "-NOAUTH Authentication required." == response.data) then
return true
end
end
return false, "Server does not require authentication"
end
action = function(host, port)
local status, err = checkRedis(host, port)
if ( not(status) ) then
return fail(err)
end
local engine = brute.Engine:new(Driver, host, port )
engine.options.script_name = SCRIPT_NAME
engine.options.firstonly = true
engine.options:setOption( "passonly", true )
local result
status, result = engine:start()
return result
end
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