[USN-4881-1] containerd vulnerability

========================================================================== Ubuntu Security Notice USN-4881-1 March 17, 2021
containerd vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.10 – Ubuntu 20.04 LTS
Summary:
The system could be made to expose sensitive information.
Software Description: – containerd: daemon to control runC
Details:
It was discovered that containerd incorrectly handled certain environment variables. Contrary to expectations, a container could receive environment variables defined for a different container, possibly containing sensitive information.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10: containerd 1.3.7-0ubuntu3.3
Ubuntu 20.04 LTS: containerd 1.3.3-0ubuntu2.3
After a standard system update you need to restart containerd to make all the necessary changes.
References: ubuntu.com/security/notices/USN-4881-1 CVE-2021-21334
Package Information: launchpad.net/ubuntu/+source/containerd/1.3.7-0ubuntu3.3 launchpad.net/ubuntu/+source/containerd/1.3.3-0ubuntu2.3