Oracle TNS Listener Checker - Metasploit


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

Table Of Contents
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Module Overview

Name: Oracle TNS Listener Checker
Module: auxiliary/scanner/oracle/tnspoison_checker
Source code: modules/auxiliary/scanner/oracle/tnspoison_checker.rb
Disclosure date: 2012-04-18
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 1521
List of CVEs: CVE-2012-1675

This module checks the server for vulnerabilities like TNS Poison. Module sends a server a packet with command to register new TNS Listener and checks for a response indicating an error. If the registration is errored, the target is not vulnerable. Otherwise, the target is vulnerable to malicious registrations.

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

This module is a scanner module, and is capable of testing against multiple hosts.

msf > use auxiliary/scanner/oracle/tnspoison_checker
msf auxiliary(tnspoison_checker) > show options
    ... show and set options ...
msf auxiliary(tnspoison_checker) > set RHOSTS ip-range
msf auxiliary(tnspoison_checker) > exploit

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(tnspoison_checker) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(tnspoison_checker) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(tnspoison_checker) > set RHOSTS file:/tmp/ip_list.txt

Required Options

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

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Msfconsole Usage

Here is how the scanner/oracle/tnspoison_checker auxiliary module looks in the msfconsole:

msf6 > use auxiliary/scanner/oracle/tnspoison_checker

msf6 auxiliary(scanner/oracle/tnspoison_checker) > show info

       Name: Oracle TNS Listener Checker
     Module: auxiliary/scanner/oracle/tnspoison_checker
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2012-04-18

Provided by:
  ir0njaw (Nikita Kelesis) <[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    1521             yes       The target port (TCP)
  THREADS  1                yes       The number of concurrent threads (max one per host)

Description:
  This module checks the server for vulnerabilities like TNS Poison. 
  Module sends a server a packet with command to register new TNS 
  Listener and checks for a response indicating an error. If the 
  registration is errored, the target is not vulnerable. Otherwise, 
  the target is vulnerable to malicious registrations.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2012-1675
  https://seclists.org/fulldisclosure/2012/Apr/204

Module Options

This is a complete list of options available in the scanner/oracle/tnspoison_checker auxiliary module:

msf6 auxiliary(scanner/oracle/tnspoison_checker) > show options

Module options (auxiliary/scanner/oracle/tnspoison_checker):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   RHOSTS                    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT    1521             yes       The target port (TCP)
   THREADS  1                yes       The number of concurrent threads (max one per host)

Advanced Options

Here is a complete list of advanced options supported by the scanner/oracle/tnspoison_checker auxiliary module:

msf6 auxiliary(scanner/oracle/tnspoison_checker) > show advanced

Module advanced options (auxiliary/scanner/oracle/tnspoison_checker):

   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
   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)
   ShowProgress         true             yes       Display progress messages during a scan
   ShowProgressPercent  10               yes       The interval in percent that progress should be shown
   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 scanner/oracle/tnspoison_checker module can do:

msf6 auxiliary(scanner/oracle/tnspoison_checker) > show actions

Auxiliary actions:

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

Evasion Options

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

msf6 auxiliary(scanner/oracle/tnspoison_checker) > 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)

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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.

<IP>:<RPORT> is not vulnerable

Here is a relevant code snippet related to the "<IP>:<RPORT> is not vulnerable" error message:

41:	      if packet
42:	        hex_packet = Rex::Text.to_hex(packet, ':')
43:	        split_hex = hex_packet.split(':')
44:	        find_packet = /\(ERROR_STACK=\(ERROR=/ === packet
45:	        if find_packet == true #TNS Packet returned ERROR
46:	          print_error("#{ip}:#{rport} is not vulnerable")
47:	        elsif split_hex[5] == '02' #TNS Packet Type: ACCEPT
48:	          print_good("#{ip}:#{rport} is vulnerable")
49:	        elsif split_hex[5] == '04' #TNS Packet Type: REFUSE
50:	          print_error("#{ip}:#{rport} is not vulnerable")
51:	        else #All other TNS packet types or non-TNS packet type response cannot guarantee vulnerability

<IP>:<RPORT> is not vulnerable

Here is a relevant code snippet related to the "<IP>:<RPORT> is not vulnerable" error message:

45:	        if find_packet == true #TNS Packet returned ERROR
46:	          print_error("#{ip}:#{rport} is not vulnerable")
47:	        elsif split_hex[5] == '02' #TNS Packet Type: ACCEPT
48:	          print_good("#{ip}:#{rport} is vulnerable")
49:	        elsif split_hex[5] == '04' #TNS Packet Type: REFUSE
50:	          print_error("#{ip}:#{rport} is not vulnerable")
51:	        else #All other TNS packet types or non-TNS packet type response cannot guarantee vulnerability
52:	          print_error("#{ip}:#{rport} might not be vulnerable")
53:	        end
54:	      else
55:	        print_error("#{ip}:#{rport} is not vulnerable")

<IP>:<RPORT> might not be vulnerable

Here is a relevant code snippet related to the "<IP>:<RPORT> might not be vulnerable" error message:

47:	        elsif split_hex[5] == '02' #TNS Packet Type: ACCEPT
48:	          print_good("#{ip}:#{rport} is vulnerable")
49:	        elsif split_hex[5] == '04' #TNS Packet Type: REFUSE
50:	          print_error("#{ip}:#{rport} is not vulnerable")
51:	        else #All other TNS packet types or non-TNS packet type response cannot guarantee vulnerability
52:	          print_error("#{ip}:#{rport} might not be vulnerable")
53:	        end
54:	      else
55:	        print_error("#{ip}:#{rport} is not vulnerable")
56:	      end
57:	      # TODO: Module should report_vuln if this finding is solid.

<IP>:<RPORT> is not vulnerable

Here is a relevant code snippet related to the "<IP>:<RPORT> is not vulnerable" error message:

50:	          print_error("#{ip}:#{rport} is not vulnerable")
51:	        else #All other TNS packet types or non-TNS packet type response cannot guarantee vulnerability
52:	          print_error("#{ip}:#{rport} might not be vulnerable")
53:	        end
54:	      else
55:	        print_error("#{ip}:#{rport} is not vulnerable")
56:	      end
57:	      # TODO: Module should report_vuln if this finding is solid.
58:	      rescue ::Rex::ConnectionError, ::Errno::EPIPE
59:	      print_error("#{ip}:#{rport} unable to connect to the server")
60:	    end

<IP>:<RPORT> unable to connect to the server

Here is a relevant code snippet related to the "<IP>:<RPORT> unable to connect to the server" error message:

52:	          print_error("#{ip}:#{rport} might not be vulnerable")
53:	        end
54:	      else
55:	        print_error("#{ip}:#{rport} is not vulnerable")
56:	      end
57:	      # TODO: Module should report_vuln if this finding is solid.
58:	      rescue ::Rex::ConnectionError, ::Errno::EPIPE
59:	      print_error("#{ip}:#{rport} unable to connect to the server")
60:	    end
61:	  end
62:	end

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References

See Also

Check also the following modules related to this module:

Authors

  • ir0njaw (Nikita Kelesis) <nikita.elkey[at]gmail.com>

Version

This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.

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