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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2017.0206 WordPress 4.9.1 Security and Maintenance Release 30 November 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WordPress Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Provide Misleading Information -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade Member content until: Saturday, December 30 2017 OVERVIEW Multiple vulnerabilities have been identified in WordPress prior to version 4.9.1. [1] IMPACT The vendor has provided the following details regarding the vulnerability: "WordPress versions 4.9 and earlier are affected by four security issues which could potentially be exploited as part of a multi-vector attack. As part of the core team's ongoing commitment to security hardening, the following fixes have been implemented in 4.9.1: Use a properly generated hash for the newbloguser key instead of a determinate substring. Add escaping to the language attributes used on html elements. Ensure the attributes of enclosures are correctly escaped in RSS and Atom feeds. Remove the ability to upload JavaScript files for users who do not have the unfiltered_html capability."[1] MITIGATION The vendor strongly encourages users to update to the latest version. [1] REFERENCES [1] WordPress 4.9.1 Security and Maintenance Release https://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-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 iQIVAwUBWh+jZIx+lLeg9Ub1AQhqgA/+I9aZc1xY/Cfr4wNY1ebOEe/7Al8Pg6uf xLppDy+EQIEwG+WJIZ/O1Hjz38udqxZIui3yQKUb3I8AeHOjuTaaHsQQPfEzQw6f Fjcn9G9a6CZO6DDOmyx4jSTq4koXPUwb+ahDtGeRcwVKcqsZVfhbDfbJPOsBsA6v 6MwmpUA4GkDbAQqf4FxIw+ndO5fHDf5cpOeRWPswZXrcVLqQAkP0p9H+tJXPHKY1 ZayPW8fVAW6KPxI80M4jzhQH4v0EYkBHOfPteMPzUX/TH7mOp8xBD4LQyrVjakMD Qvc5TtW3YFETUJi7vSf+bQkgyW/V7LpBN+5+X9ilLfbPC+wHIoUqJMWNohmaUc33 NZ4ANfrJOvuXbOeAyiKxBjBgjRFyf/DK0XON1eTLyYZ6xKiA//D0kO6nkDA5bXy/ s4ReUQRdZAVHdxYBc8+rvsxaftQSraZCQgsHN+IKA0m0RXaO4frTszprgdOZwoh1 +P28/q1X4vIHrNEKADDpTII8lx0UhAfQYlf5Ac+KLNt2KWRsOA6g34b2YgnL0ZND 3iSg7C4yRiAJpFTWJ784/um5YnJn6Guuzly5/Ry2tQdQtUnqLRXzMqxoiUwt3OiR bxRc9LBvNrY79yHW2M/kTHE0OEut/8kBIC904m4FBQPWJ9/hh1fhdrvJAMW8BUc+ Uha5oMWlbl8= =pks9 -----END PGP SIGNATURE-----