Joomla! 1.5.11 and prior: Multiple vulnerabilities

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                         AUSCERT Security Bulletin

                               ASB-2009.1002
                                  Joomla!
                                6 July 2009

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        AusCERT Security Bulletin Summary
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Product:              Joomla! 1.5.11 and prior
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Cross-site Scripting  -- Remote with User Interaction
                      Read-only Data Access -- Remote/Unauthenticated      
Resolution:           Upgrade
Member content until: Wednesday, August  5 2009

OVERVIEW

        Joomla! 1.5.12 has been released correcting three (3) security
        vulnerabilities. [1]


IMPACT

        Two cross site scripting vulnerabilities were found in the Joomla 
        frontend and an information disclosure issue was exposed in the Admin 
        client. 
        
        The cross site scripting weaknesses are due to improper parsing of 
        HTTP_REFERRER and PHP_SELF. [2, 3]
        
        Path information could be exposed due to certain files being missed 
        from the JEXEC check. [4]


MITIGATION

        These vulnerabilities are fixed in version 1.5.12 available from
        Joomla!'s website. [1]


REFERENCES

        [1] Joomla! 1.5.12 Released
            http://www.joomla.org/announcements/release-news/

        [2] [20090604] - Core - Frontend XSS - HTTP_REFERER not properly filtered
            http://developer.joomla.org/security/news/298-20090604-core-frontend-xss-httpreferer-not-properly-filtered.html

        [3] [20090605] - Core - Frontend XSS - PHP_SELF not properly filtered
            http://developer.joomla.org/security/news/299-20090605-core-frontend-xss-phpself-not-properly-filtered.html

        [4] [20090606] - Core - Missing JEXEC Check
            http://developer.joomla.org/security/news/300-20090606-core-missing-jexec-check.html

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
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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
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                On call after hours for member emergencies only.
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