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local comm = require "comm"
local ldap = require "ldap"
local nmap = require "nmap"
local shortport = require "shortport"
local stdnse = require "stdnse"
local string = require "string"
description = [[
Retrieves the LDAP root DSA-specific Entry (DSE)
]]
---
--
-- @usage
-- nmap -p 389 --script ldap-rootdse <host>
--
-- @output
-- PORT STATE SERVICE
-- 389/tcp open ldap
-- | ldap-rootdse:
-- | currentTime: 20100112092616.0Z
-- | subschemaSubentry: CN=Aggregate,CN=Schema,CN=Configuration,DC=cqure,DC=net
-- | dsServiceName: CN=NTDS Settings,CN=LDAPTEST001,CN=Servers,CN=Default-First-Site,CN=Sites,CN=Configuration,DC=cqure,DC=net
-- | namingContexts: DC=cqure,DC=net
-- | namingContexts: CN=Configuration,DC=cqure,DC=net
-- | namingContexts: CN=Schema,CN=Configuration,DC=cqure,DC=net
-- | namingContexts: DC=DomainDnsZones,DC=cqure,DC=net
-- | namingContexts: DC=ForestDnsZones,DC=cqure,DC=net
-- | namingContexts: DC=TAPI3Directory,DC=cqure,DC=net
-- | defaultNamingContext: DC=cqure,DC=net
-- | schemaNamingContext: CN=Schema,CN=Configuration,DC=cqure,DC=net
-- | configurationNamingContext: CN=Configuration,DC=cqure,DC=net
-- | rootDomainNamingContext: DC=cqure,DC=net
-- | supportedControl: 1.2.840.113556.1.4.319
-- | .
-- | .
-- | supportedControl: 1.2.840.113556.1.4.1948
-- | supportedLDAPVersion: 3
-- | supportedLDAPVersion: 2
-- | supportedLDAPPolicies: MaxPoolThreads
-- | supportedLDAPPolicies: MaxDatagramRecv
-- | supportedLDAPPolicies: MaxReceiveBuffer
-- | supportedLDAPPolicies: InitRecvTimeout
-- | supportedLDAPPolicies: MaxConnections
-- | supportedLDAPPolicies: MaxConnIdleTime
-- | supportedLDAPPolicies: MaxPageSize
-- | supportedLDAPPolicies: MaxQueryDuration
-- | supportedLDAPPolicies: MaxTempTableSize
-- | supportedLDAPPolicies: MaxResultSetSize
-- | supportedLDAPPolicies: MaxNotificationPerConn
-- | supportedLDAPPolicies: MaxValRange
-- | highestCommittedUSN: 126991
-- | supportedSASLMechanisms: GSSAPI
-- | supportedSASLMechanisms: GSS-SPNEGO
-- | supportedSASLMechanisms: EXTERNAL
-- | supportedSASLMechanisms: DIGEST-MD5
-- | dnsHostName: EDUSRV011.cqure.local
-- | ldapServiceName: cqure.net:edusrv011$@CQURE.NET
-- | serverName: CN=EDUSRV011,CN=Servers,CN=Default-First-Site,CN=Sites,CN=Configuration,DC=cqure,DC=net
-- | supportedCapabilities: 1.2.840.113556.1.4.800
-- | supportedCapabilities: 1.2.840.113556.1.4.1670
-- | supportedCapabilities: 1.2.840.113556.1.4.1791
-- | isSynchronized: TRUE
-- | isGlobalCatalogReady: TRUE
-- | domainFunctionality: 0
-- | forestFunctionality: 0
-- |_ domainControllerFunctionality: 2
--
--
-- The root DSE object may contain a number of different attributes as described in RFC 2251 section 3.4:
-- * namingContexts: naming contexts held in the server
-- * subschemaSubentry: subschema entries (or subentries) known by this server
-- * altServer: alternative servers in case this one is later unavailable.
-- * supportedExtension: list of supported extended operations.
-- * supportedControl: list of supported controls.
-- * supportedSASLMechanisms: list of supported SASL security features.
-- * supportedLDAPVersion: LDAP versions implemented by the server.
--
-- The above example, which contains a lot more information is from Windows 2003 accessible without authentication.
-- The same request against OpenLDAP will result in significantly less information.
--
-- The ldap-search script queries the root DSE for the namingContexts and/or defaultNamingContexts, which it sets as base
-- if no base object was specified
--
-- Credit goes out to Martin Swende who provided me with the initial code that got me started writing this.
--
-- Version 0.2
-- Created 01/12/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 01/20/2010 - v0.2 - added SSL support
author = "Patrik Karlsson"
copyright = "Patrik Karlsson"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"discovery", "safe"}
dependencies = {"ldap-brute"}
portrule = shortport.port_or_service({389,636}, {"ldap","ldapssl"})
function action(host,port)
local socket = nmap.new_socket()
local status, searchResEntries, req, result, opt
-- In order to discover what protocol to use (SSL/TCP) we need to send a few bytes to the server
-- An anonymous bind should do it
local ldap_anonymous_bind = string.char( 0x30, 0x0c, 0x02, 0x01, 0x01, 0x60, 0x07, 0x02, 0x01, 0x03, 0x04, 0x00, 0x80, 0x00 )
local _
socket, _, opt = comm.tryssl( host, port, ldap_anonymous_bind, nil )
if not socket then
return
end
-- We close and re-open the socket so that the anonymous bind does not distract us
socket:close()
status = socket:connect(host, port, opt)
socket:set_timeout(10000)
-- Searching for an empty argument list against LDAP on W2K3 returns all attributes
-- This is not the case for OpenLDAP, so we do a search for an empty attribute list
-- Then we compare the results against some known and expected returned attributes
req = { baseObject = "", scope = ldap.SCOPE.base, derefPolicy = ldap.DEREFPOLICY.default }
status, searchResEntries = ldap.searchRequest( socket, req )
-- Check if we were served all the results or not?
if not ldap.extractAttribute( searchResEntries, "namingContexts" ) and
not ldap.extractAttribute( searchResEntries, "supportedLDAPVersion" ) then
-- The namingContexts was not there, try to query all attributes instead
-- Attributes extracted from Windows 2003 and complemented from RFC
local attribs = {"_domainControllerFunctionality","configurationNamingContext","currentTime","defaultNamingContext",
"dnsHostName","domainFunctionality","dsServiceName","forestFunctionality","highestCommittedUSN",
"isGlobalCatalogReady","isSynchronized","ldap-get-baseobject","ldapServiceName","namingContexts",
"rootDomainNamingContext","schemaNamingContext","serverName","subschemaSubentry",
"supportedCapabilities","supportedControl","supportedLDAPPolicies","supportedLDAPVersion",
"supportedSASLMechanisms", "altServer", "supportedExtension"}
req = { baseObject = "", scope = ldap.SCOPE.base, derefPolicy = ldap.DEREFPOLICY.default, attributes = attribs }
status, searchResEntries = ldap.searchRequest( socket, req )
end
if not status then
socket:close()
return
end
result = ldap.searchResultToTable( searchResEntries )
socket:close()
-- if taken a way and ldap returns a single result, it ain't shown....
result.name = "LDAP Results"
return stdnse.format_output(true, result )
end