[USN-5012-1] containerd vulnerabilities

========================================================================== 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: ubuntu.com/security/notices/USN-5012-1 CVE-2021-32760
Package Information: launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~21.04.2 launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~20.10.2 launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~20.04.2 launchpad.net/ubuntu/+source/containerd/1.5.2-0ubuntu1~18.04.2