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                         AUSCERT Security Bulletin

                               ASB-2009.1005
                                 FCKeditor
                                7 July 2009

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

Product:              FCKeditor
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated      
                      Cross-site Scripting            -- Remote with User Interaction
Resolution:           Upgrade
CVE Names:            CVE-2009-2265  
Member content until: Thursday, August  6 2009

OVERVIEW

        FCKeditor 2.6.4 is reported to be vulnerable to multiple directory
        traversal attacks, leading to potential execution of arbitrary code.
        This is currently being actively exploited. [1]


IMPACT

        The exposure allows for executable files and remote shells to be 
        uploaded to arbitrary directories and executed without 
        authentication. [1, 2, 3]
        
        Multiple cross site scripting flaws were also discovered in the
        packaged samples directory. [1]


MITIGATION

        FCKeditor 2.6.4.1 is available from the vendor's website. [4]
        
        Alternatively, follow the mitigation steps as outlined at
        oCERT. [1]


REFERENCES

        [1] #2009-007 FCKeditor input sanitization errors
            http://www.ocert.org/advisories/ocert-2009-007.html

        [2] FCKEditor advisory
            http://isc.sans.org/diary.html?storyid=6724

        [3] CVE-2009-2265
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2265

        [4] FCKeditor 2.6.4.1
            http://www.fckeditor.net/download

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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