Title: Cisco BBSM Captive Portal Cross-site Scripting
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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