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local brute = require "brute"
local creds = require "creds"
local match = require "match"
local shortport = require "shortport"
local stdnse = require "stdnse"
local string = require "string"
local openssl = stdnse.silent_require "openssl"
description=[[
Performs brute force password auditing against a OpenVAS vulnerability scanner daemon using the OTP 1.0 protocol.
]]
---
-- @output
-- PORT STATE SERVICE REASON VERSION
-- 9391/tcp open ssl/openvas syn-ack
-- | openvas-otp-brute:
-- | Accounts
-- | openvas:openvas - Valid credentials
-- | Statistics
-- |_ Performed 4 guesses in 4 seconds, average tps: 1
--
-- @args openvas-otp-brute.threads sets the number of threads. Default: 4
author = "Vlatko Kosturjak"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"intrusive", "brute"}
portrule = shortport.port_or_service({9390,9391}, "openvas", "tcp")
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.socket = brute.new_socket()
if ( not(self.socket:connect(self.host, self.port, "ssl")) ) then
return false
end
return true
end,
login = function( self, username, password )
local status, err = self.socket:send("< OTP/1.0 >\n")
if ( not ( status ) ) then
local err = brute.Error:new( "Unable to send handshake" )
err:setAbort(true)
return false, err
end
local response
status, response = self.socket:receive_buf(match.pattern_limit("\r?\n", 2048), false)
if ( not(status) or response ~= "< OTP/1.0 >" ) then
local err = brute.Error:new( "Bad handshake from server: "..response )
err:setAbort(true)
return false, err
end
status, err = self.socket:send(username.."\n")
if ( not(status) ) then
local err = brute.Error:new( "Couldn't send user: "..username )
err:setAbort( true )
return false, err
end
status, err = self.socket:send(password.."\n")
if ( not(status) ) then
local err = brute.Error:new( "Couldn't send password: "..password )
err:setAbort( true )
return false, err
end
-- Create a buffer and receive the first line
local line
status, line = self.socket:receive_buf(match.pattern_limit("\r?\n", 2048), false)
if (line == nil or string.match(line,"Bad login")) then
stdnse.debug2("Bad login: %s/%s", username, password)
return false, brute.Error:new( "Bad login" )
elseif (string.match(line,"SERVER <|>")) then
stdnse.debug1("Good login: %s/%s", username, password)
return true, creds.Account:new(username, password, creds.State.VALID)
end
stdnse.debug1("WARNING: Unhandled response: %s", line)
return false, brute.Error:new( "unhandled response" )
end,
disconnect = function( self )
self.socket:close()
end,
}
action = function(host, port)
local engine = brute.Engine:new(Driver, host, port)
engine:setMaxThreads(1)
engine.options.script_name = SCRIPT_NAME
local status, result = engine:start()
return result
end
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