SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (Forum/Board/Portal)  >   PostNuke Vendors:   postnuke.com
PostNuke Input Validation Flaw in 'NS-Your_Account' Module Lets Remote Users Inject SQL Commands
SecurityTracker Alert ID:  1009801
SecurityTracker URL:  http://securitytracker.com/id/1009801
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Updated:  Sep 3 2004
Original Entry Date:  Apr 15 2004
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 0.726 and prior versions
Description:   An input validation vulnerability was reported in PostNuke. A remote authenticated user can inject SQL commands on the target system.

pokleyzz of SCAN Associates reported that several modules do not properly validate user-supplied input.

It is reported that the 'sid' variable in the NS-Comments module is not properly filtered. A remote user can reportedly inject SQL commands. A remote user can also create insert specially crafted text into a comment so that that when the comment is viewed by a target user, arbitrary scripting code will be executed by the target user's browser. The code will originate from the site running the PostNuke 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.

It is also reported that the 'timezoneoffset' variable in the NS-Your_Account module permits a remote authenticated user to supply a specially crafted value to inject SQL commands to be executed by the underlying SQL database. A remote authenticated user can change account information for a target user (e.g., change the administrator's password).

A demonstration exploit is available at:

http://www.scan-associates.net/papers/post_nuker.php.txt

The vendor was reportedly notified on February 5, 2004 without response.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the PostNuke 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.

A remote user can inject SQL commands. This can be exploited, for example, to change the password of a target user.

Solution:   The vendor has issued a fix (as of .726-2), available at:

http://downloads.postnuke.com/

Vendor URL:  www.postnuke.com/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [Full-Disclosure] [SCAN Associates Sdn Bhd Security Advisory] Postnuke v 0.726 and below SQL injection


Products: Postnuke v 0.726 (http://www.postnuke.com)
Date: 15 April 2004
Author:  pokleyzz <pokleyzz_at_scan-associates.net>
Contributors:sk_at_scan-associates.net
shaharil_at_scan-associates.net
munir_at_scan-associates.net
URL: http://www.scan-associates.net

Summary: Postnuke v 0.726 and below SQL injection

Description
===========
Postnuke is Web Content Management System written in PHP and using mysql
as database backend.

Details
=======
We have found multiple vulnerabilities in Postnuke v 0.726 as described
below.

SQL Injection in NS-Comments module
-----------------------------------
There is SQL injection in INSERT statement for variable "sid" in file
modules/NS-Comments/index.php line 1142:


                          VALUES ($nextid, ".pnVarPrepForStore($pid).",
".pnVarPrepForStore($sid).", now(), '".pnVarPrepForStore($uname)."',
'".pnVarPrepForStore($email)."',
                                                    '".pnVarPrepForStore($url)."',
'".pnVarPrepForStore($ip)."', '".pnVarPrepForStore($subject)."',
'".pnVarPrepForStore($comment)."', '".pnVarPrepForStore($score)."', 0)");


This will allow Postnuke user with permission to post comment include any
character in their comment and perform XSS attack to steal other user  
cookies.

SQL Injection in NS-Your_Account module
----------------------------------------
There is SQL injection in UPDATE statement for variable "timezoneoffset"
in file modules/NS-Your_Account/user/modules/changeinfo.php php line 334
and 354:

   $column[timezone_offset]=" . pnVarPrepForStore($timezoneoffset) . "

This will allow Postnuke user to change information for other user account
including Administrator password.

Workaround
==========
1) modules/NS-Comments/index.php

                          VALUES ($nextid, '".pnVarPrepForStore($pid)."',
'".pnVarPrepForStore($sid)."', now(), '".pnVarPrepForStore($uname)."',
'".pnVarPrepForStore($email)."',
                                                    '".pnVarPrepForStore($url)."',
'".pnVarPrepForStore($ip)."', '".pnVarPrepForStore($subject)."',
'".pnVarPrepForStore($comment)."', '".pnVarPrepForStore($score)."', 0)");

2)modules/NS-Your_Account/user/modules/changeinfo.php

$column[timezone_offset]='" . pnVarPrepForStore($timezoneoffset) . "'

Proof of concept
================
[http://www.scan-associates.net/papers/post_nuker.php.txt]

Vendor Response
===============
05 February 2004	- security@postnuke.com contacted through email. no  
response.
07 April 2004	- security@postnuke.com contacted through email. no  
response.		

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2021, SecurityGlobal.net LLC