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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3283 USN-5103-1: docker.io vulnerability 5 October 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: docker.io Publisher: Ubuntu Operating System: Ubuntu UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Access Confidential Data -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-41089 Original Bulletin: https://ubuntu.com/security/notices/USN-5103-1 Comment: This advisory references vulnerabilities in products which run on platforms other than Ubuntu. It is recommended that administrators running docker.io check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5103-1: docker.io vulnerability 04 October 2021 Docker could be made to adjust the permissions of files. Releases o Ubuntu 21.04 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS o Ubuntu 16.04 ESM Packages o docker.io - Linux container runtime Details Lei Wang and Ruizhi Xiao discovered that the Moby Docker engine in Docker incorrectly allowed the docker cp command to make permissions changes in the host filesystem in some situations. A local attacker could possibly use to this to expose sensitive information or gain administrative privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04 o docker.io - 20.10.7-0ubuntu1~21.04.2 Ubuntu 20.04 o docker.io - 20.10.7-0ubuntu1~20.04.2 Ubuntu 18.04 o docker.io - 20.10.7-0ubuntu1~18.04.2 Ubuntu 16.04 o docker.io - 18.09.7-0ubuntu1~16.04.9+esm1 Available with UA Infra or UA Desktop In general, a standard system update will make all the necessary changes. References o CVE-2021-41089 - --------------------------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. 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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). 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