SSH 2.0 Version Fuzzer - Metasploit


This page contains detailed information about how to use the auxiliary/fuzzers/ssh/ssh_version_2 metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
hide

Module Overview

Name: SSH 2.0 Version Fuzzer
Module: auxiliary/fuzzers/ssh/ssh_version_2
Source code: modules/auxiliary/fuzzers/ssh/ssh_version_2.rb
Disclosure date: -
Last modification time: 2017-07-24 06:26:21 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 22
List of CVEs: -

This module sends a series of SSH requests with malicious version strings.

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/fuzzers/ssh/ssh_version_2
msf auxiliary(ssh_version_2) > show targets
    ... a list of targets ...
msf auxiliary(ssh_version_2) > set TARGET target-id
msf auxiliary(ssh_version_2) > show options
    ... show and set options ...
msf auxiliary(ssh_version_2) > exploit

Required Options

  • RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

Go back to menu.

Msfconsole Usage

Here is how the fuzzers/ssh/ssh_version_2 auxiliary module looks in the msfconsole:

msf6 > use auxiliary/fuzzers/ssh/ssh_version_2

msf6 auxiliary(fuzzers/ssh/ssh_version_2) > show info

       Name: SSH 2.0 Version Fuzzer
     Module: auxiliary/fuzzers/ssh/ssh_version_2
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  hdm <[email protected]>

Check supported:
  No

Basic options:
  Name    Current Setting  Required  Description
  ----    ---------------  --------  -----------
  RHOSTS                   yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT   22               yes       The target port (TCP)

Description:
  This module sends a series of SSH requests with malicious version 
  strings.

Module Options

This is a complete list of options available in the fuzzers/ssh/ssh_version_2 auxiliary module:

msf6 auxiliary(fuzzers/ssh/ssh_version_2) > show options

Module options (auxiliary/fuzzers/ssh/ssh_version_2):

   Name    Current Setting  Required  Description
   ----    ---------------  --------  -----------
   RHOSTS                   yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT   22               yes       The target port (TCP)

Advanced Options

Here is a complete list of advanced options supported by the fuzzers/ssh/ssh_version_2 auxiliary module:

msf6 auxiliary(fuzzers/ssh/ssh_version_2) > show advanced

Module advanced options (auxiliary/fuzzers/ssh/ssh_version_2):

   Name            Current Setting  Required  Description
   ----            ---------------  --------  -----------
   CHOST                            no        The local client address
   CPORT                            no        The local client port
   ConnectTimeout  10               yes       Maximum number of seconds to establish a TCP connection
   FuzzChar        X                yes       Sets the character to use for generating long strings
   FuzzTracer      MSFROCKS         yes       Sets the magic string to embed into fuzzer string inputs
   Proxies                          no        A proxy chain of format type:host:port[,type:host:port][...]
   SSL             false            no        Negotiate SSL/TLS for outgoing connections
   SSLCipher                        no        String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
   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)
   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 fuzzers/ssh/ssh_version_2 module can do:

msf6 auxiliary(fuzzers/ssh/ssh_version_2) > show actions

Auxiliary actions:

   Name  Description
   ----  -----------

Evasion Options

Here is the full list of possible evasion options supported by the fuzzers/ssh/ssh_version_2 auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(fuzzers/ssh/ssh_version_2) > show evasion

Module evasion options:

   Name                Current Setting  Required  Description
   ----                ---------------  --------  -----------
   TCP::max_send_size  0                no        Maxiumum 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

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.

The service may have crashed: iteration:<VALUE> method=<LAST_INP> string=<VALUE> error=<LAST_ERR>

Here is a relevant code snippet related to the "The service may have crashed: iteration:<VALUE> method=<LAST_INP> string=<VALUE> error=<LAST_ERR>" error message:

59:	        disconnect
60:	      end
61:	
62:	      if(not @connected)
63:	        if(last_str)
64:	          print_status("The service may have crashed: iteration:#{cnt-1} method=#{last_inp} string=#{last_str.unpack("H*")[0]} error=#{last_err}")
65:	        else
66:	          print_status("Could not connect to the service: #{last_err}")
67:	        end
68:	        return
69:	      end

Could not connect to the service: <LAST_ERR>

Here is a relevant code snippet related to the "Could not connect to the service: <LAST_ERR>" error message:

61:	
62:	      if(not @connected)
63:	        if(last_str)
64:	          print_status("The service may have crashed: iteration:#{cnt-1} method=#{last_inp} string=#{last_str.unpack("H*")[0]} error=#{last_err}")
65:	        else
66:	          print_status("Could not connect to the service: #{last_err}")
67:	        end
68:	        return
69:	      end
70:	
71:	      if(not @banner)

The service may have crashed (no banner): iteration:<VALUE> method=<LAST_INP> string=<VALUE>

Here is a relevant code snippet related to the "The service may have crashed (no banner): iteration:<VALUE> method=<LAST_INP> string=<VALUE>" error message:

67:	        end
68:	        return
69:	      end
70:	
71:	      if(not @banner)
72:	        print_status("The service may have crashed (no banner): iteration:#{cnt-1} method=#{last_inp} string=#{last_str.unpack("H*")[0]} ")
73:	        return
74:	      end
75:	
76:	      last_str = str
77:	      last_inp = @last_fuzzer_input

Go back to menu.

Go back to menu.

See Also

Check also the following modules related to this module:

Authors

  • hdm

Version

This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.

Go back to menu.