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Category:   Application (Forum/Board/Portal)  >   XMB Forum Vendors:   Xmbforum.com
XMB Forum Input Validation Flaw in 'buddy.php' Lets Remote Users Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1007035
SecurityTracker URL:  http://securitytracker.com/id/1007035
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jun 23 2003
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Exploit Included:  Yes  
Version(s): 1.8, 1.9
Description:   An input validation hole was reported in XMB Forum in the 'buddy.php' script. A remote user can conduct cross-site scripting attacks.

SecuriTeam reported that the 'action' field of the 'buddy.php' script does not properly filter user-supplied 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 XMB Forum 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 is provided:

http://pathto/XMBforum/buddy.php?action=<
script>alert(document.cookie)</script>&buddy=<script
>alert(document.cookie)</script>

The vendor has reportedly been notified.

SecuriTeam credits thanh duong <knight4vn@yahoo.com> with reporting this flaw.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the XMB Forum 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. According to the report, the vendor plans to issue a fix.
Vendor URL:  www.xmbforum.com/home/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [UNIX] XSS Vulnerabilities Found in XMB Forum


The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  XSS Vulnerabilities Found in XMB Forum
------------------------------------------------------------------------


SUMMARY

 <http://www.xmbforum.com/> XMB Forum is "a free web-based bulletin board 
system written in PHP with a MySQL backend". Multiple cross site scripting 
vulnerabilities have been found in the XMB Forum, these vulnerabilities 
would allow attackers to insert malicious HTML and JavaScript code into 
existing web pages.

DETAILS

Vulnerable systems:
 * XMB Forum version 1.8
 * XMB Forum version 1.9

Examples:
http://pathto/XMBforum/member.php?action=viewpro&member=admin< 
script>alert(document.cookie)</script>

http://pathto/XMBforum/buddy.php?action=< 
script>alert(document.cookie)</script>&buddy=<script 
>alert(document.cookie)</script>

Vendor status:
The vendor has been contacted. A fixed version is scheduled to be 
released.


ADDITIONAL INFORMATION

The information has been provided by  <mailto:knight4vn@yahoo.com> thanh 
duong.



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