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                         AUSCERT Security Bulletin

                               ASB-2009.1058
                     WordPress 2.8.4: Security Release
                              20 August 2009

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

Product:              WordPress
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Increased Privileges   -- Remote/Unauthenticated
                      Modify Arbitrary Files -- Remote/Unauthenticated
                      Cross-site Scripting   -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-2854 CVE-2009-2853 CVE-2009-2851
Member content until: Saturday, September 19 2009

OVERVIEW

        WordPress has released an update to correct multiple security flaws.


IMPACT

        CVE-2009-2851 - "Cross-site scripting (XSS) vulnerability in the 
        administrator interface in WordPress before 2.8.2 allows remote 
        attackers to inject arbitrary web script or HTML via a comment 
        author URL." [1][2]
        
        CVE-2009-2853 - "Wordpress before 2.8.3 allows remote attackers to 
        gain privileges via a direct request to 
            (1) admin-footer.php, 
            (2) edit-category-form.php, 
            (3) edit-form-advanced.php, 
            (4) edit-form-comment.php, 
            (5) edit-link-category-form.php, 
            (6) edit-link-form.php, 
            (7) edit-page-form.php, and 
            (8) edit-tag-form.php in wp-admin/." [3]
        
        CVE-2009-2854 - "Wordpress before 2.8.3 does not check capabilities 
        for certain actions, which allows remote attackers to make 
        unauthorized edits or additions via a direct request to 
            (1) edit-comments.php, 
            (2) edit-pages.php, 
            (3) edit.php, 
            (4) edit-category-form.php, 
            (5) edit-link-category-form.php, 
            (6) edit-tag-form.php, 
            (7) export.php, (8) import.php, or 
            (9) link-add.php in wp-admin/." [4]
        
        In versions 2.8.3 and prior it may also be possible for an attacker 
        to perform a password reset via a specially crafted URL.


MITIGATION

        It is advised to update your WordPress installation to the latest 
        version which at the time of writing is 2.8.4. [5]


REFERENCES

        [1] CVE-2009-2851
            http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-2851

        [2] WordPress 2.8.3: Security Release
            http://wordpress.org/development/2009/08/wordpress-2-8-3-security-release/

        [3] CVE-2009-2853
            http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-2853

        [4] CVE-2009-2854
            http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-2854

        [5] WordPress 2.8.4: Security Release
            http://wordpress.org/development/2009/08/2-8-4-security-release/

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

===========================================================================
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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