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Category:   Application (Forum/Board/Portal)  >   Invision Power Board Vendors:   Invision Power Services
Invision Power Board Input Validation Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1026876
SecurityTracker URL:  http://securitytracker.com/id/1026876
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 30 2012
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 3.2.3
Description:   A vulnerability was reported in Invision Power Board. A remote user can conduct cross-site scripting attacks.

The software does not properly filter HTML code from user-supplied input before displaying the input. 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 Invision Power Board 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.

A demonstration exploit URL [for when a forum does not contain a sub-forum] is provided:

http://[target]/forums/index.php?showforum=53"><script>with(document)alert(cookie)</script>

The vendor was notified on March 10, 2012.

The original advisory is available at:

http://www.mavitunasecurity.com/cross-site-scripting-vulnerability-in-invision-power-board/

Vasil A. reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Invision Power Board 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:   The vendor has issued a fix.
Vendor URL:  invisionpower.com/ (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Date:  Thu, 29 Mar 2012 14:29:48 +0300
Subject:  Cross-site scripting vulnerability in Invision Power Board version 3.2.3

Information
--------------------
Name :  Cross-site scripting vulnerability in Invision Power Board
version 3.2.3
Software :  Invision Power Board version 3.2.3
Vendor Homepage :  http://www.invisionpower.com
Vulnerability Type :  Cross-site scripting
Severity :  High
Researcher :  Vasil A. xss@9y.com
Advisory Reference :  NS-12-005

Description
--------------------
Invision Power Board (abbreviated IPB, IP.Board or IP Board) is an
Internet forum software produced by Invision Power Services, Inc. It
is written in PHP and primarily uses MySQL as a database management
system, although support for other database engines is available.

While Invision Power Board is a commercially sold product, there is a
large modding community and many of these modifications are free. In
addition, many groups offer the download or design of free and paid skins.

Details
--------------------
IP Board is affected by a Cross-site scripting vulnerability in version 3.2=
.3.
Example PoC url is as follows :
http://example.com/forums/index.php?showforum=3D53"><script>with(document)a=
lert(cookie)</script>

Additional notes:
1.If a forum contain sub-forums this vulnerability don't exist.

2.Most of boards uses "Friendly Url style",but the attack can be
performed  by using "legacy URL style" in the query,e.g :

http://example.com/forum/index.php?showforum=3D2"><script>alert(/xss/.sourc=
e)</script>

instead:

http://example.com/forum/index.php?/forum/2-example/

You can read the full article about Cross-site Scripting vulnerability
from here:

Cross-site Scripting
Solution
--------------------
The vendor issued patch for this vulnerability. Please see the references.

Advisory Timeline
--------------------
10/03/2012 - First contact: Sent the vulnerability details
12/03/2012 - Second contact: Ask for patch
14/03/2012 - Vulnerability Fixed
29/03/2012 - Vulnerability Released

Credits
-------------------
It has been discovered on testing of Netsparker, Web Application
Security Scanner - http://www.mavitunasecurity.com/netsparker/

References
-------------------
MSL Advisory Link:
http://www.mavitunasecurity.com/cross-site-scripting-vulnerability-in-invis=
ion-power-board/
Netsparker Advisories: http://www.mavitunasecurity.com/netsparker-advisorie=
s/

About Netsparker
--------------------
Netsparker=AE can find and report security issues such as SQL Injection
and Cross-site Scripting (XSS) in all web applications regardless of
the platform and the technology they are built on. Netsparker's unique
detection and exploitation techniques allows it to be dead accurate in
reporting hence it's the first and the only False Positive Free web
application security scanner.

--=20
Netsparker Advisories, <advisories@mavitunasecurity.com>
Homepage, http://www.mavitunasecurity.com/netsparker-advisories/
 
 


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