Native LDAP Server (Example) - Metasploit


This page contains detailed information about how to use the auxiliary/server/ldap metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
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Module Overview

Name: Native LDAP Server (Example)
Module: auxiliary/server/ldap
Source code: modules/auxiliary/server/ldap.rb
Disclosure date: -
Last modification time: 2022-03-10 10:28:25 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): -
List of CVEs: -

This module provides a Rex based LDAP service to expose the native Rex LDAP server functionality created during log4shell development.

Module Ranking and Traits

Module Ranking:

  • normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.

Basic Usage

msf > use auxiliary/server/ldap
msf auxiliary(ldap) > show targets
    ... a list of targets ...
msf auxiliary(ldap) > set TARGET target-id
msf auxiliary(ldap) > show options
    ... show and set options ...
msf auxiliary(ldap) > exploit

Knowledge Base

Vulnerable Application

This module demonstrates setting up and running a basic LDAP server in Metasploit. The data it hosts is provided by the LDIF_FILE.

Verification Steps

  1. Start msfconsole
  2. Do: use auxiliary/server/ldap
  3. Do: set LDIF_FILE data/exploits/ldap/msf.ldif
    • This assumes the working directory is the top-level Metasploit Framework directory and configures the module to use the included template.
  4. Do: run
  5. From a new shell, do: ldapsearch -x -H ldap://192.168.159.128 -b "dc=metasploit,dc=com" "(objectClass=*)"
    • This runs a query using the ldapsearch utility to show the server is responsive.

Options

LDIF_FILE

Directory LDIF file path.

Scenarios

Metasploit Server Demonstration

msf6 > use auxiliary/server/ldap
msf6 auxiliary(server/ldap) > set LDIF_FILE data/exploits/ldap/msf.ldif
LDIF_FILE => data/exploits/ldap/msf.ldif
msf6 auxiliary(server/ldap) > show options 

Module options (auxiliary/server/ldap):

   Name       Current Setting              Required  Description
   ----       ---------------              --------  -----------
   LDIF_FILE  data/exploits/ldap/msf.ldif  no        Directory LDIF file path
   SRVHOST    0.0.0.0                      yes       The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
   SRVPORT    389                          yes       The local port to listen on.


Auxiliary action:

   Name     Description
   ----     -----------
   Service  Run LDAP server


msf6 auxiliary(server/ldap) > run
[*] Auxiliary module running as background job 0.
msf6 auxiliary(server/ldap) >

From another shell:

$ ldapsearch -x -H ldap://192.168.159.128 -b "dc=metasploit,dc=com" "(objectClass=*)"
# extended LDIF
#
# LDAPv3
# base  with scope subtree
# filter: (objectClass=*)
# requesting: ALL
#

# metasploit.com
dn: dc=metasploit,dc=com
objectClass: dcObject
objectClass: organization
o: Metasploit Framework
dc: metasploit

# search result
search: 2
result: 0 Success
text: Success

# numResponses: 2
# numEntries: 1

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Msfconsole Usage

Here is how the server/ldap auxiliary module looks in the msfconsole:

msf6 > use auxiliary/server/ldap

msf6 auxiliary(server/ldap) > show info

       Name: Native LDAP Server (Example)
     Module: auxiliary/server/ldap
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  RageLtMan <rageltman@sempervictus>
  Spencer McIntyre

Available actions:
  Name     Description
  ----     -----------
  Service  Run LDAP server

Check supported:
  No

Basic options:
  Name       Current Setting  Required  Description
  ----       ---------------  --------  -----------
  LDIF_FILE                   no        Directory LDIF file path
  SRVHOST    0.0.0.0          yes       The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all
                                        addresses.
  SRVPORT    389              yes       The local port to listen on.

Description:
  This module provides a Rex based LDAP service to expose the native 
  Rex LDAP server functionality created during log4shell development.

Module Options

This is a complete list of options available in the server/ldap auxiliary module:

msf6 auxiliary(server/ldap) > show options

Module options (auxiliary/server/ldap):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   LDIF_FILE                   no        Directory LDIF file path
   SRVHOST    0.0.0.0          yes       The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all
                                          addresses.
   SRVPORT    389              yes       The local port to listen on.

Auxiliary action:

   Name     Description
   ----     -----------
   Service  Run LDAP server

Advanced Options

Here is a complete list of advanced options supported by the server/ldap auxiliary module:

msf6 auxiliary(server/ldap) > show advanced

Module advanced options (auxiliary/server/ldap):

   Name           Current Setting  Required  Description
   ----           ---------------  --------  -----------
   LdapServerTcp  true             yes       Serve TCP LDAP requests
   LdapServerUdp  true             yes       Serve UDP LDAP requests
   ListenerComm                    no        The specific communication channel to use for this service
   VERBOSE        false            no        Enable detailed status messages
   WORKSPACE                       no        Specify the workspace for this module

Auxiliary Actions

This is a list of all auxiliary actions that the server/ldap module can do:

msf6 auxiliary(server/ldap) > show actions

Auxiliary actions:

   Name     Description
   ----     -----------
   Service  Run LDAP server

Evasion Options

Here is the full list of possible evasion options supported by the server/ldap auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(server/ldap) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

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Error Messages

This module may fail with the following error messages:

Error Messages

Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.

Failed to bind to port <SRVPORT>: <E.MESSAGE>

Here is a relevant code snippet related to the "Failed to bind to port <SRVPORT>: <E.MESSAGE>" error message:

43:	  #
44:	  def run
45:	    start_service
46:	    service.wait
47:	  rescue Rex::BindFailed => e
48:	    print_error "Failed to bind to port #{datastore['SRVPORT']}: #{e.message}"
49:	  ensure
50:	    stop_service
51:	  end
52:	
53:	  #

Failed to handle LDAP request due to <E>

Here is a relevant code snippet related to the "Failed to handle LDAP request due to <E>" error message:

107:	                 Net::LDAP::PDU::SearchResult
108:	               )
109:	             end
110:	      resp.nil? ? client.close : on_send_response(client, resp)
111:	    rescue StandardError => e
112:	      print_error("Failed to handle LDAP request due to #{e}")
113:	      client.close
114:	    end
115:	  end
116:	
117:	end

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See Also

Check also the following modules related to this module:

Authors

  • RageLtMan <rageltman[at]sempervictus>
  • Spencer McIntyre

Version

This page has been produced using Metasploit Framework version 6.2.29-dev. For more modules, visit the Metasploit Module Library.

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