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                         AUSCERT Security Bulletin

                               ASB-2009.1090
           Cross-Site Scripting vulnerability in IBM Lotus Notes
                             21 September 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              IBM Lotus Notes
Operating System:     Linux variants
                      Mac OS X
                      Windows
Impact/Access:        Cross-site Scripting -- Remote with User Interaction
Resolution:           Patch/Upgrade
Member content until: Wednesday, October 21 2009

OVERVIEW

        A security vulnerability has been identifed in IBM Lotus Notes
        versions 8.0 and 8.5.


IMPACT

        The vendor has provided the following information regarding this 
        vulnerability:
        
        "IBM Lotus Notes 8.x (Standard Configuration) clients include a 
        built-in RSS feed reader which allows you to receive regular RSS 
        updates from Web sites. In certain circumstances end users may find 
        themselves vulnerable to a cross-site scripting exploit." [1]


MITIGATION

        IBM have offered 3 methods to mitigate this vulnerability. Users
        can either download a patch, disable the pop-up preview window 
        notes client preference or disable feeds via a desktop policy. [1]
        
        Details on these mitigations are available on the vendor's website. [1]


REFERENCES

        [1] Response to 'IBM Lotus Notes 8.5 RSS Widget Privilege Escalation
            http://www-01.ibm.com/support/docview.wss?uid=swg21403834&myns=swglotus&mynp=OCSSKTWP&mync=E

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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