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Cisco Unified MeetingPlace XSS Vulnerability
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SUMMARY
There exists a cross site scripting issue in Cisco MeetingPlace
Application. The result of this is that when a specially crafted web page
with a hidden arbitrary code could be executed on the host accessing the
application.
DETAILS
Affected Versions:
This vulnerability has been confirmed in the following versions:
* 4.3.0.246
* 4.3.0.246.5
* 5.3.104.0
* 5.3.104.3
The following versions have been tested and are unaffected due to the fact
they return an xml template:
* 5.3.333.0
* 5.3.447
* 5.3.447.4
* 5.4.70.0
* 6.0.170.0
Cisco MeetingPlace provides a web based application for online meetings.
It was discovered that a specially crafted script could be executed on
certain parameters with in MeetingPlace application.
The result is script code execution in the local user context in the host.
Preliminary tests concluded the system is vulnerable with most popular web
browsers such as Microsoft Internet Explorer 7.0 and Mozilla Firefox 2.0
fully patched.
User intervention (e.g. clicking on a malicious link) is necessary to
trigger the exploit.
Additional Information
Cisco Unified MeetingPlace Web Conferencing (MP) provides real-time
collaboration functionality to an organization's intranet and extranet,
and integrates Cisco Unified MeetingPlace with a web server, thus
providing users with a browser-based interface. Web Conferencing enables
users to schedule and attend conferences, access meeting materials, and
collaborate on documents from common web browsers.
Success Template (STPL) and Failure Template (FTPL) parameters are used to
specify the return template of a user request. These should correspond to
an actual template file that resides on the MP server's file system.
When MP servers running software versions 5.3.235.0 and earlier receive
invalid input for the STPL or FTPL parameters, they return a HTML error
template page. The returned HTML page contains the original inputted URL.
When this reflected XSS vulnerability is exploited, malicious code or a
script is embedded within the URL and associated with either the STPL or
FTPL parameter. The malicious code is usually in the form of a script
embedded in the URL of a link or the code may be stored on the vulnerable
server or malicious website. An unsuspecting user is enticed to follow a
malicious link to a vulnerable MP server that injects (reflects) the
malicious code back to the user's browser as the MP server does not have
the requested template file associated with the STPL or FTPL parameter.
Therefore, the MP server responds with the template used for error pages,
which includes the requested URL with the malicious code, thus causing the
target user's browser to execute it.
Software versions 5.3.333.0 and later of Cisco Unified MeetingPlace Web
Conferencing will return an XML message with an embedded error code when
receiving invalid input for the STPL and FTPL parameters. The error
message is properly and securely formatted per the XML CDATA
specification.
All 5.4 and 6.0 versions of Cisco Unified MeetingPlace Web Conferencing
are unaffected by this vulnerability.
To determine the software version of a Cisco Unified MeetingPlace Web
Conferencing server, access the MP server home page via an HTTP session;
the version information is provided at the bottom of the home page. The
following output shows an example of the text viewable when accessing the
home page of a MeetingPlace Web Conferencing server running software
version 5.3.447.4:
Copyright 1992-2007 Cisco Systems, Inc. All Rights Reserved.
Version: 5.3.447.4
Workarounds
There are no known workarounds for this vulnerability.
For additional information on XSS attacks and the methods used to exploit
these vulnerabilities, please refer to the Cisco Applied Intelligence
Response "Understanding Cross-Site Scripting (XSS) Threat Vectors", which
is available at the following link:
<http://www.cisco.com/warp/public/707/cisco-air-20060922-understanding-xss.shtml> http://www.cisco.com/warp/public/707/cisco-air-20060922-understanding-xss.shtml
ADDITIONAL INFORMATION
The information has been provided by <mailto:Disclosure@securetest.com>
Disclosure.
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