========================================================================== Ubuntu Security Notice USN-5311-2 May 16, 2022 containerd regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.10 - Ubuntu 20.04 LTS Summary: USN-5311-1 fix was reverted by mistake in containerd. Software Description: - containerd: daemon to control runC Details: USN-5311-1 released updates for contained. Unfortunately, a subsequent update reverted the fix for this CVE by mistake. This update corrects the problem. We apologize for the inconvenience. Original advisory details: It was discovered that containerd allows attackers to gain access to read- only copies of arbitrary files and directories on the host via a specially- crafted image configuration. An attacker could possibly use this issue to obtain sensitive information. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10: containerd 1.5.9-0ubuntu1~21.10.3 Ubuntu 20.04 LTS: containerd 1.5.9-0ubuntu1~20.04.4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5311-2 https://ubuntu.com/security/notices/USN-5311-1 CVE-2022-23648 Package Information: https://launchpad.net/ubuntu/+source/containerd/1.5.9-0ubuntu1~21.10.3 https://launchpad.net/ubuntu/+source/containerd/1.5.9-0ubuntu1~20.04.4