USN-4653-1: containerd vulnerability

Releases

• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• containerd - daemon to control runC

Details

It was discovered that access controls for the shim’s API socket did not
restrict access to the abstract unix domain socket in some cases. An attacker
could use this vulnerability to run containers with elevated privileges.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.10

• containerd - 1.3.7-0ubuntu3.1

Ubuntu 20.04

• containerd - 1.3.3-0ubuntu2.1

Ubuntu 18.04

• containerd - 1.3.3-0ubuntu1~18.04.3

Ubuntu 16.04

• containerd - 1.2.6-0ubuntu1~16.04.5

After a standard system update you need to restart containerd to make
all the necessary changes.

References

• CVE-2020-15257

Related notices

• USN-4653-2: containerd, golang-github-containerd-containerd-dev, golang-github-docker-containerd-dev