CVE-2023-25173

containerd is an open source container runtime. A bug was found in containerd prior to versions 1.6.18 and 1.5.18 where supplementary groups are not set up properly inside a container. If an attacker has direct access to a container and manipulates their supplementary group access, they may be able to use supplementary group access to bypass primary group restrictions in some cases, potentially gaining access to sensitive information or gaining the ability to execute code in that container. Downstream applications that use the containerd client library may be affected as well. This bug has been fixed in containerd v1.6.18 and v.1.5.18. Users should update to these versions and recreate containers to resolve this issue. Users who rely on a downstream application that uses containerd's client library should check that application for a separate advisory and instructions. As a workaround, ensure that the `"USER $USERNAME"` Dockerfile instruction is not used. Instead, set the container entrypoint to a value similar to `ENTRYPOINT ["su", "-", "user"]` to allow `su` to properly set up supplementary groups.

Affected products

Alt Linux, Almalinux, Astra Linux, Centos, Kubernetes Containerd, Linuxmint, Moby, Red Hat

Linuxfoundation Containerd

< 1.5.18, 1.6.18

CVSS 3.1

7.8 HIGH

EPSS

0.5% (43th percentile)

Weakness

CWE-863

NVD status

Modified

Published

2023-02-16

No exploit for CVE-2023-25173 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.