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local mysql = require "mysql"
local nmap = require "nmap"
local shortport = require "shortport"
local stdnse = require "stdnse"
local table = require "table"
local openssl = stdnse.silent_require "openssl"
description = [[
Attempts to show all variables on a MySQL server.
]]
---
-- @args mysqluser The username to use for authentication. If unset it
-- attempts to use credentials found by <code>mysql-brute</code> or
-- <code>mysql-empty-password</code>.
-- @args mysqlpass The password to use for authentication. If unset it
-- attempts to use credentials found by <code>mysql-brute</code> or
-- <code>mysql-empty-password</code>.
--
-- @output
-- 3306/tcp open mysql
-- | mysql-variables:
-- | auto_increment_increment: 1
-- | auto_increment_offset: 1
-- | automatic_sp_privileges: ON
-- | back_log: 50
-- | basedir: /usr/
-- | binlog_cache_size: 32768
-- | bulk_insert_buffer_size: 8388608
-- | character_set_client: latin1
-- | character_set_connection: latin1
-- | character_set_database: latin1
-- | .
-- | .
-- | .
-- | version_comment: (Debian)
-- | version_compile_machine: powerpc
-- | version_compile_os: debian-linux-gnu
-- |_ wait_timeout: 28800
author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery", "intrusive"}
dependencies = {"mysql-brute", "mysql-empty-password"}
-- Version 0.1
-- Created 01/23/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
portrule = shortport.port_or_service(3306, "mysql")
action = function( host, port )
local socket = nmap.new_socket()
local catch = function() socket:close() end
local try = nmap.new_try(catch)
local result, response = {}, nil
local users = {}
local nmap_args = nmap.registry.args
local status, rows
-- set a reasonable timeout value
socket:set_timeout(5000)
-- first, let's see if the script has any credentials as arguments?
if nmap_args.mysqluser then
users[nmap_args.mysqluser] = nmap_args.mysqlpass or ""
-- next, let's see if mysql-brute or mysql-empty-password brought us anything
elseif nmap.registry.mysqlusers then
-- do we have root credentials?
if nmap.registry.mysqlusers['root'] then
users['root'] = nmap.registry.mysqlusers['root']
else
-- we didn't have root, so let's make sure we loop over them all
users = nmap.registry.mysqlusers
end
-- last, no dice, we don't have any credentials at all
else
stdnse.debug1("No credentials supplied, aborting ...")
return
end
--
-- Iterates over credentials, breaks once it successfully receives results
--
for username, password in pairs(users) do
try( socket:connect(host, port) )
response = try( mysql.receiveGreeting( socket ) )
status, response = mysql.loginRequest( socket, { authversion = "post41", charset = response.charset }, username, password, response.salt )
if status and response.errorcode == 0 then
local status, rs = mysql.sqlQuery( socket, "show variables" )
if status then
for _, row in ipairs(rs.rows) do
table.insert(result, ("%s: %s"):format(row[1], row[2]) )
end
end
end
socket:close()
end
return stdnse.format_output(true, result)
end
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