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local _G = require "_G"
local mysql = require "mysql"
local nmap = require "nmap"
local shortport = require "shortport"
local stdnse = require "stdnse"
local table = require "table"
description = [[
Audits MySQL database server security configuration against parts of
the CIS MySQL v1.0.2 benchmark (the engine can be used for other MySQL
audits by creating appropriate audit files).
]]
---
-- @usage
-- nmap -p 3306 --script mysql-audit --script-args "mysql-audit.username='root', \
-- mysql-audit.password='foobar',mysql-audit.filename='nselib/data/mysql-cis.audit'"
--
-- @args mysql-audit.username the username with which to connect to the database
-- @args mysql-audit.password the password with which to connect to the database
-- @args mysql-audit.filename the name of the file containing the audit rulebase
--
-- @output
-- PORT STATE SERVICE
-- 3306/tcp open mysql
-- | mysql-audit:
-- | CIS MySQL Benchmarks v1.0.2
-- | 3.1: Skip symbolic links => PASS
-- | 3.2: Logs not on system partition => PASS
-- | 3.2: Logs not on database partition => PASS
-- | 4.1: Supported version of MySQL => REVIEW
-- | Version: 5.1.54-1ubuntu4
-- | 4.4: Remove test database => PASS
-- | 4.5: Change admin account name => FAIL
-- | 4.7: Verify Secure Password Hashes => PASS
-- | 4.9: Wildcards in user hostname => FAIL
-- | The following users were found with wildcards in hostname
-- | root
-- | super
-- | super2
-- | 4.10: No blank passwords => PASS
-- | 4.11: Anonymous account => PASS
-- | 5.1: Access to mysql database => REVIEW
-- | Verify the following users that have access to the MySQL database
-- | user host
-- | root localhost
-- | root patrik-11
-- | root 127.0.0.1
-- | debian-sys-maint localhost
-- | root %
-- | super %
-- | 5.2: Do not grant FILE privileges to non Admin users => REVIEW
-- | The following users were found having the FILE privilege
-- | super
-- | super2
-- | 5.3: Do not grant PROCESS privileges to non Admin users => REVIEW
-- | The following users were found having the PROCESS privilege
-- | super
-- | 5.4: Do not grant SUPER privileges to non Admin users => REVIEW
-- | The following users were found having the SUPER privilege
-- | super
-- | 5.5: Do not grant SHUTDOWN privileges to non Admin users => REVIEW
-- | The following users were found having the SHUTDOWN privilege
-- | super
-- | 5.6: Do not grant CREATE USER privileges to non Admin users => REVIEW
-- | The following users were found having the CREATE USER privilege
-- | super
-- | 5.7: Do not grant RELOAD privileges to non Admin users => REVIEW
-- | The following users were found having the RELOAD privilege
-- | super
-- | 5.8: Do not grant GRANT privileges to non Admin users => PASS
-- | 6.2: Disable Load data local => FAIL
-- | 6.3: Disable old password hashing => PASS
-- | 6.4: Safe show database => FAIL
-- | 6.5: Secure auth => FAIL
-- | 6.6: Grant tables => FAIL
-- | 6.7: Skip merge => FAIL
-- | 6.8: Skip networking => FAIL
-- | 6.9: Safe user create => FAIL
-- | 6.10: Skip symbolic links => FAIL
-- |
-- |_ The audit was performed using the db-account: root
-- Version 0.1
-- Created 05/29/2011 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery", "safe"}
portrule = shortport.port_or_service(3306, "mysql")
local TEMPLATE_NAME, ADMIN_ACCOUNTS = "", ""
local function fail (err) return stdnse.format_output(false, err) end
local function loadAuditRulebase( filename )
local rules = {}
local env = setmetatable({
test = function(t) table.insert(rules, t) end;
}, {__index = _G})
local file, err = loadfile(filename, "t", env)
if ( not(file) ) then
return false, fail(("Failed to load rulebase:\n%s"):format(err))
end
file()
TEMPLATE_NAME = env.TEMPLATE_NAME
ADMIN_ACCOUNTS = env.ADMIN_ACCOUNTS
return true, rules
end
action = function( host, port )
local username = stdnse.get_script_args("mysql-audit.username")
local password = stdnse.get_script_args("mysql-audit.password")
local filename = stdnse.get_script_args("mysql-audit.filename")
if ( not(filename) ) then
return fail("No audit rulebase file was supplied (see mysql-audit.filename)")
end
if ( not(username) ) then
return fail("No username was supplied (see mysql-audit.username)")
end
local status, tests = loadAuditRulebase( filename )
if( not(status) ) then return tests end
local socket = nmap.new_socket()
status = socket:connect(host, port)
local response
status, response = mysql.receiveGreeting( socket )
if ( not(status) ) then return response end
status, response = mysql.loginRequest( socket, { authversion = "post41", charset = response.charset }, username, password, response.salt )
if ( not(status) ) then return fail("Failed to authenticate") end
local results = {}
for _, test in ipairs(tests) do
local queries = ( "string" == type(test.sql) ) and { test.sql } or test.sql
local rowstab = {}
for _, query in ipairs(queries) do
local row
status, row = mysql.sqlQuery( socket, query )
if ( not(status) ) then
table.insert( results, { ("%s: ERROR: Failed to execute SQL statement"):format(test.id) } )
else
table.insert(rowstab, row)
end
end
if ( #rowstab > 0 ) then
local result_part = {}
local res = test.check(rowstab)
local status, data = res.status, res.result
status = ( res.review and "REVIEW" ) or (status and "PASS" or "FAIL")
table.insert( result_part, ("%s: %s => %s"):format(test.id, test.desc, status) )
if ( data ) then
table.insert(result_part, { data } )
end
table.insert( results, result_part )
end
end
socket:close()
results.name = TEMPLATE_NAME
table.insert(results, "")
table.insert(results, {name = "Additional information", ("The audit was performed using the db-account: %s"):format(username),
("The following admin accounts were excluded from the audit: %s"):format(table.concat(ADMIN_ACCOUNTS, ","))
})
return stdnse.format_output(true, { results })
end
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