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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2445 USN-5012-1: containerd vulnerabilities 21 July 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: containerd Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Modify Permissions -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-32760 Reference: ESB-2021.2440 Original Bulletin: https://ubuntu.com/security/notices/USN-5012-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5012-1: containerd vulnerabilities 20 July 2021 containerd could be made to overwrite file permissions. Releases o Ubuntu 21.04 o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o containerd - daemon to control runC Details It was discovered that containerd incorrectly handled file permission changes. If a user or automated system were tricked into launching a specially crafted container image, a remote attacker could change permissions on files on the host filesystem and possibly escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04 o containerd - 1.5.2-0ubuntu1~21.04.2 Ubuntu 20.10 o containerd - 1.5.2-0ubuntu1~20.10.2 Ubuntu 20.04 o containerd - 1.5.2-0ubuntu1~20.04.2 Ubuntu 18.04 o containerd - 1.5.2-0ubuntu1~18.04.2 After a standard system update you need to restart containerd to make all the necessary changes. References o CVE-2021-32760 - --------------------------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 iQIVAwUBYPds8+NLKJtyKPYoAQh+Gg//S6mRojDs0dTSKzMn790ssEAshthYq4sC 3KyJbsu5zcSfxzJ496tRRUywgmhCBOY0J25uyLU2TwaK0fwXKnRJyqGgFzhNg18u okAen14RTce7mgwL+TPuzdCMLUKEvQ3JGDdtja3SiWJUXnanVF5oK/HJdxz+Eh52 Xb41CnwrAm5bpmzXEf/NjrXgkAEALq9bHq/mQqPCmhvcexmrkQ04ZAFQfXQuD1+r uYxQVMXAw/TgUWHb/VhJzJ0iIBM/mSYdc+s6TS/iusmFdBMBg7Fn2fD0BtAcD43J UgElgpG942errnlFTDGS2FVt6DE+84ZVIOpbeM8iCh/YUfDzPWNW5ZCNzlNkmQz4 PWTz8wE3HgBQCzYx80DVir5AqpCvy3qfxZEXolzO3mGEU8iOf4YejhP3iqsvkRWy QhVc5Nh5oMbG+Ne9kqNPIo9qpXm9/1NXFWBcUyxFzu3fBsfVgwznCCLLy51bNlNq 4pNTpj95xMlapthVTRza0NYLgqmNFxuXEDWhEEGibdXENpxVBoIrN014Yx+mnV1s 2LnIMDuX+6JlG2E085gnlal3ViV0eFTN/ARs0hNYoJ/91gVGNSEmS1YurDEZhUue JU4DrkYA8Put03NsNN63qhtvGBcebMLuaH4J8TW3bteRZqyNsb6XWGSl7OHLl9oc 9ADS0D2BiLc= =zw/i -----END PGP SIGNATURE-----