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Category:   Device (Embedded Server/Appliance)  >   Cisco Building Broadband Service Manager (BBSM) Vendors:   Cisco
Cisco Building Broadband Service Manager (BBSM) Input Validation Hole Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1020018
SecurityTracker URL:  http://securitytracker.com/id/1020018
CVE Reference:   CVE-2008-2165   (Links to External Site)
Updated:  May 15 2008
Original Entry Date:  May 14 2008
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): 5.3
Description:   A vulnerability was reported in the Cisco Building Broadband Service Manager (BBSM). A remote user can conduct cross-site scripting attacks.

The captive portal 'AccessCodeStart.asp' page 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 Cisco Building Broadband Service Manager (BBSM) site 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://[target]/ekgnkm/AccessCodeStart.asp?msg=%3Cscript%3Ealert(%22XSS%22);%3C/script%3E

Cisco has assigned Cisco bug ID CSCso62583 to this vulnerability.

Brad Antoniewicz of Foundstone reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Cisco Building Broadband Service Manager (BBSM), 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 (BBSM Patch 5332), available at:

http://www.cisco.com/

Vendor URL:  www.cisco.com/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  13 May 2008 19:44:51 -0000
Subject:  Cisco BBSM Captive Portal Cross-site Scripting

Title: Cisco BBSM Captive Portal Cross-site Scripting
-------------------------------------------------------------
Vendor: Cisco Systems
Vendor URL: www.cisco.com
Vendor Response: Vendor has been notified and has since addressed the issue in the latest software release.

Description:
	A non-persistent XSS vulnerability is present within the AccessCodeStart.asp page. A 
malicious user may leverage this to possibly gain access client information in captive 
portal/hotspot locations using this software. 

Example:

http://host/ekgnkm/AccessCodeStart.asp?msg=%3Cscript%3Ealert(%22XSS%22);%3C/script%3E

Patch Information:

Patch URL - 
http://tools.cisco.com/support/downloads/go/ImageList.x?relVer=5.3&mdfid=278455427&sftType=Building%20Broadband%20Service%20Manager%20(BBSM)%20Updates&optPlat=&nodecount=2&edesignator=null&modelName=Cisco%20Building%20Broadband%20Service%20Manager
%205.3&treeMdfId=281527126&treeName=Network%20Monitoring%20and%20Management

Download BBSMPatch5332.zip

CVE: CVE-2008-2165

Credit:

Brad Antoniewicz
brad.antoniewicz@foundstone.com

 
 


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