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Re: Cisco BBSM Captive Portal Cross-site Scripting
From: Eloy Paris <elparis () cisco com>
Date: Wed, 14 May 2008 12:55:27 -0400

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Hello,

This is the Cisco PSIRT response to an issue that was discovered
and reported to Cisco by Brad Antoniewicz from Mcafee/Foundstone
Professional Services regarding a cross-site scripting (XSS)
vulnerability in Cisco's Building Broadband Service Manager (BBSM).

This vulnerability is documented in Cisco bug ID CSCso62583. The Release
Note for said bug reads as follows:

+---- BEGIN RELEASE NOTE TEXT ----

Symptom:

Some web pages belonging to the Cisco Building Broadband Service Manager
(BBSM) web-based interface are affected by a reflected cross-site
scripting (XSS) vulnerability.

The vulnerability may allow an attacker to run arbitrary web browser
scripting code on the machine the user is using to access the BBSM web
interface, under the same privileges as the logged-in user.

Conditions:

The attack requires of a small amount of social engineering in order
to fool a user into following a specially crafted link, containing the
malicious code, and purporting to belong to the BBSM web interface

Workaround:

None.

Further problem description:

Customers are recommended to install BBSM patch 5332, which is available
for download on www.cisco.com

Additional information on cross-site scripting attacks is available on
the document entitled "Cisco Applied Mitigation Bulletin: Understanding
Cross-Site Scripting (XSS) Threat Vectors", which is available at
http://www.cisco.com/warp/public/707/cisco-amb-20060922-understanding-xss.shtml

+---- END RELEASE NOTE TEXT ----

This issue has been fixed on BBSM v5.3 patch 5332. Customers with valid
service contracts can download patch 5332 from the following 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

Cisco PSIRT would like to thank Brad Antoniewicz and Mcafee/Foundstone
Professional Services for bringing this issue to our attention and for
working with PSIRT toward coordinated disclosure of the issue. Cisco
PSIRT greatly appreciates the opportunity to work with researchers on
security vulnerabilities and welcomes the opportunity to review and
assist in product reports.

Thanks,

Eloy Paris.-
Cisco PSIRT
http://www.cisco.com/go/psirt/
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