========================================================================== Ubuntu Security Notice USN-5012-1 July 20, 2021 containerd vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: containerd could be made to overwrite file permissions. Software Description: - 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: containerd 1.5.2-0ubuntu1~21.04.2 Ubuntu 20.10: containerd 1.5.2-0ubuntu1~20.10.2 Ubuntu 20.04 LTS: containerd 1.5.2-0ubuntu1~20.04.2 Ubuntu 18.04 LTS: 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: https://ubuntu.com/security/notices/USN-5012-1 CVE-2021-32760 Package Information: https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~21.04.2 https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~20.10.2 https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~20.04.2 https://launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~18.04.2