Wordpress: Execute Arbitrary Code/Commands -- Remote/Unauthenticated

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
                         AUSCERT Security Bulletin

                               ASB-2017.0185
                     WordPress 4.8.3 Security Release
                              1 November 2017

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

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

Product:              Wordpress
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
Member content until: Friday, December  1 2017

OVERVIEW

        Multiple vulnerability have been identified in WordPress prior to
        version 4.8.3. [1]


IMPACT

        The vendor has provided the following details regarding the 
        vulnerability:
        
        "$wpdb->prepare() can create unexpected and unsafe queries leading 
        to potential SQL injection (SQLi). WordPress core is not directly 
        vulnerable to this issue, but we’ve added hardening to prevent 
        plugins and themes from accidentally causing a vulnerability.
        
        This release includes a change in behaviour for the esc_sql() 
        function. Most developers will not be affected by this change." 
        [1]


MITIGATION

        The vendor strongly encourages users to update to the latest 
        version. [1]


REFERENCES

        [1] WordPress 4.8.3 Security Release
            https://wordpress.org/news/2017/10/wordpress-4-8-3-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.

===========================================================================
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.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=gRX4
-----END PGP SIGNATURE-----