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Category:   Application (Forum/Board/Portal)  >   Dvbbs Vendors:   dvbbs.net
Dvbbs Input Validation Flaws Permit Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1014632
SecurityTracker URL:  http://securitytracker.com/id/1014632
CVE Reference:   CVE-2005-2588   (Links to External Site)
Updated:  Jun 8 2008
Original Entry Date:  Aug 8 2005
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Exploit Included:  Yes  
Version(s): 7.1 , 7.1 Sp2
Description:   Lostmon reported an input validation vulnerability in Dvbbs. A remote user can conduct cross-site scripting attacks.

Several scripts do 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 Dvbbs 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]/dispbbs.asp?boardID=8&ID=550194&page=1[XSS-CODE]

http://[target]/dispuser.asp?name=Walltrapass[XSS-CODE]

http://[target]/boardhelp.asp?boardid=0&act=2&title=[XSS-CODE]
http://[target]/boardhelp.asp?boardid=0&view=faq[XSS-CODE]&act=3
http://[target]/boardhelp.asp?boardid=0&view=faq&act=3[XSS-CODE]
http://[target]/boardhelp.asp?boardid=0&act=2[XSS-CODE]&title=

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Dvbbs 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:  down.dvbbs.net/SoftView/SoftView_2455.html (Links to External Site)
Cause:   Input validation error
Underlying OS:  Windows (2000), Windows (2003), Windows (XP)

Message History:   None.


 Source Message Contents

Subject:  DVBBS Multiple variable Cross site scripting

#############################################
DVBBS Multiple variable Cross site scripting
vendor url:http://down.dvbbs.net/
SoftView/SoftView_2455.html
Advisory:http://lostmon.blogspot.com/2005/08/
dvbbs-multiple-variable-cross-site.html
vendor notify:yes exploit available:yes
OSVDB ID:18512
#############################################

DVBBS contains a flaw that allows a remote cross site scripting
attack.This flaw exists because the application does not validate
multiple variables upon submission to multiple scripts.This could
allow a user to create a specially crafted URL that would execute
arbitrary code in a user's browser within the trust relationship
between the browser and the server, leading to a loss of integrity


############
solution
############

no solution available at this time !


############
versions
############

Dvbbs 7.1 Sp2
Dvbbs 7.1 

#############
timeline
#############

discovered:21-jul-2005
disclosure:21-jul-2005
public disclosure:08-ago-2005

####################
proof of concept
####################


http://[VICTIM]/dispbbs.asp?boardID=8&ID=550194&page=1[XSS-CODE]

http://[VICTIM]/dispuser.asp?name=Walltrapass[XSS-CODE]

http://[VICTIM]/boardhelp.asp?boardid=0&act=2&title=[XSS-CODE]
http://[VICTIM]/boardhelp.asp?boardid=0&view=faq[XSS-CODE]&act=3
http://[VICTIM]/boardhelp.asp?boardid=0&view=faq&act=3[XSS-CODE]
http://[VICTIM]/boardhelp.asp?boardid=0&act=2[XSS-CODE]&title=


Thnx to estrella to be my ligth

atentamente:
Lostmon (lostmon@gmail.com)
Web-Blog: http://lostmon.blogspot.com/
--
La curiosidad es lo que hace mover la mente....
 
 


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