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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1410 USN-4922-2: Ruby vulnerability 27 April 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: ruby2.7 Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Create Arbitrary Files -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-28965 Reference: ESB-2021.1347 ESB-2021.1334 Original Bulletin: https://ubuntu.com/security/notices/USN-4922-2 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4922-2: Ruby vulnerability 26 April 2021 Ruby incorrectly handled XML documents. Releases o Ubuntu 21.04 Packages o ruby2.7 - Object-oriented scripting language Details USN-4922-1 fixed a vulnerability in Ruby. This update provides the corresponding update for Ubuntu 21.04. Original advisory details: Juho Nurminen discovered that the REXML gem bundled with Ruby incorrectly parsed and serialized XML documents. A remote attacker could possibly use this issue to perform an XML round-trip attack. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04 o ruby2.7 - 2.7.2-4ubuntu1.1 o libruby2.7 - 2.7.2-4ubuntu1.1 In general, a standard system update will make all the necessary changes. References o CVE-2021-28965 Related notices o USN-4922-1 : ruby2.3, libruby2.5, libruby2.7, libruby2.3, ruby2.7, ruby2.5 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== 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 iQIVAwUBYId9FuNLKJtyKPYoAQi+Yg/9Hdqmqj7RgFfj8tGkR1Bc6yP3FDj4N7gZ lKgXwDYrIhcOKqpumR3reMUyoN60BH1iFJdOB19CnCZ5mhaLoyzRfW/t0Is4OYHj r1135rgo1ty6RgP7xmCyeOQzq9iESfmifYopwplRQ/iLA1RwRsXlMjxzf9Qlc1G8 4DgKvfPAXtCJerY4QFIsFSL2H7VF07t37N0C3+Or2m4GllF0lCe6jwVTeEfQjJ/A Dcr3MWavkTY4p7QzhQQNxpHFQS7wfYNrpnWVDCjfDu1Ka1qi/jKAHyFWDeqzvq4E 8Ib5auXHkN2m+RrO7LEcEyZkBMxQRGJNo9IOCmUp1iu/+txYz4NxC2DaAfFd+bVQ zd8251LpLl01ZiBzkX/SuDs65c26QdMObIzOIUssXKovh0LFhATvtCIu3DXafaDu +vxVVFd/iJYPkeHKlqyx9icHK3zzItlpB8iUcRgJNoe23B1nOwEJsVBBPIFRXYse lzdyHv5UU1OGDf0QP2az+qD7qEipOqBC3pPZqwpDZXl+Ek3euEqLBIRJlCl/dHfL jgxFa6rXDqnQ84nM9JGyPsAQItQkTCp8uexd9ug3wNwqmmmN2Tk4GmbxTtNnBCQJ NV1Rv0O1zdMNI7tx/tLtaKHYHCC8ilKMIWXrv0abG0nUTr5NYaBI7aMmGkgPZX+C cM6hvihbEnY= =sTDO -----END PGP SIGNATURE-----