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Ubuntu Security Notice USN-4881-1
March 17, 2021
containerd vulnerability
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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:
https://ubuntu.com/security/notices/USN-4881-1
CVE-2021-21334
Package Information:
https://launchpad.net/ubuntu/+source/containerd/1.3.7-0ubuntu3.3
https://launchpad.net/ubuntu/+source/containerd/1.3.3-0ubuntu2.3
