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description = [[
Attempts to brute force the Application Entity Title of a DICOM server (DICOM Service Provider).
Application Entity Titles (AET) are used to restrict responses only to clients knowing the title. Hence,
the called AET is used as a form of password.
]]
---
-- @usage nmap -p4242 --script dicom-brute <target>
-- @usage nmap -sV --script dicom-brute <target>
-- @usage nmap --script dicom-brute --script-args passdb=aets.txt <target>
--
-- @output
-- PORT STATE SERVICE REASON
-- 4242/tcp open vrml-multi-use syn-ack
-- | dicom-brute:
-- | Accounts:
-- | Called Application Entity Title:ORTHANC - Valid credentials
-- |_ Statistics: Performed 5 guesses in 1 seconds, average tps: 5.0
---
author = "Paulino Calderon <calderon()calderonpale.com>"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"auth", "brute"}
local shortport = require "shortport"
local dicom = require "dicom"
local stdnse = require "stdnse"
local nmap = require "nmap"
local brute = require "brute"
local creds = require "creds"
portrule = shortport.port_or_service({104, 2345, 2761, 2762, 4242, 11112}, "dicom", "tcp", "open")
Driver = {
new = function(self, host, port)
local o = {}
setmetatable(o, self)
self.__index = self
o.host = host
o.port = port
o.passonly = true
return o
end,
connect = function(self)
return true
end,
disconnect = function(self)
end,
login = function(self, username, password)
stdnse.debug2("Trying with called AE title:%s", password)
local dcm_conn, err = dicom.associate(self.host, self.port, nil, password)
if dcm_conn then
return true, creds.Account:new("Called Application Entity Title", password, creds.State.VALID)
else
return false, brute.Error:new("Incorrect AET")
end
end,
check = function(self)
local dcm_conn, err = dicom.associate(self.host, self.port)
if dcm_conn then
return false, "DICOM SCU allows any AET"
end
return true
end
}
action = function(host, port)
local engine = brute.Engine:new(Driver, host, port)
engine:setMaxThreads(5)
engine.options.script_name = SCRIPT_NAME
engine.options:setOption("passonly", true)
local status, result = engine:start()
return result
end
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