Memcached Extractor - Metasploit


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

Table Of Contents
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Module Overview

Name: Memcached Extractor
Module: auxiliary/gather/memcached_extractor
Source code: modules/auxiliary/gather/memcached_extractor.rb
Disclosure date: -
Last modification time: 2021-02-17 12:33:59 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 11211
List of CVEs: -

This module extracts the slabs from a memcached instance. It then finds the keys and values stored in those slabs.

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/gather/memcached_extractor
msf auxiliary(memcached_extractor) > show options
    ... show and set options ...
msf auxiliary(memcached_extractor) > set RHOSTS ip-range
msf auxiliary(memcached_extractor) > exploit

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(memcached_extractor) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(memcached_extractor) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(memcached_extractor) > 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 gather/memcached_extractor auxiliary module looks in the msfconsole:

msf6 > use auxiliary/gather/memcached_extractor

msf6 auxiliary(gather/memcached_extractor) > show info

       Name: Memcached Extractor
     Module: auxiliary/gather/memcached_extractor
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  Paul Deardorff <[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    11211            yes       The target port (TCP)
  THREADS  1                yes       The number of concurrent threads (max one per host)

Description:
  This module extracts the slabs from a memcached instance. It then 
  finds the keys and values stored in those slabs.

References:
  https://github.com/memcached/memcached/blob/master/doc/protocol.txt

Module Options

This is a complete list of options available in the gather/memcached_extractor auxiliary module:

msf6 auxiliary(gather/memcached_extractor) > show options

Module options (auxiliary/gather/memcached_extractor):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   RHOSTS                    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT    11211            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 gather/memcached_extractor auxiliary module:

msf6 auxiliary(gather/memcached_extractor) > show advanced

Module advanced options (auxiliary/gather/memcached_extractor):

   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
   MAXKEYS              100              yes       Maximum number of keys to be pulled from each slab
   PRINTKEYS            10               yes       Number of keys shown in preview table for each instance
   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 gather/memcached_extractor module can do:

msf6 auxiliary(gather/memcached_extractor) > show actions

Auxiliary actions:

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

Evasion Options

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

msf6 auxiliary(gather/memcached_extractor) > 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.

unable to determine memcached protocol version

Here is a relevant code snippet related to the "unable to determine memcached protocol version" error message:

142:	            proto: 'tcp',
143:	            info: version
144:	          )
145:	        end
146:	      else
147:	        print_error("unable to determine memcached protocol version")
148:	        return
149:	      end
150:	      if(command_string=='cachedump')
151:	        keys = enumerate_keys
152:	      else

Could not connect to memcached server!

Here is a relevant code snippet related to the "Could not connect to memcached server!" error message:

165:	      print_line
166:	      print_line("#{result_table}")
167:	      unless localhost?(ip)
168:	        path = store_loot('memcached.dump', 'text/plain', ip, data, 'memcached.txt', 'Memcached extractor')
169:	        print_good("memcached loot stored at #{path}")
170:	      end
171:	    rescue Rex::ConnectionRefused, Rex::ConnectionTimeout
172:	      vprint_error("Could not connect to memcached server!")
173:	    end
174:	  end
175:	end

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References

See Also

Check also the following modules related to this module:

Authors

  • Paul Deardorff <paul_deardorff[at]rapid7.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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