Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Containerd | < 1.5.18 |
Related Weaknesses (CWE)
References
- https://github.com/advisories/GHSA-4wjj-jwc9-2x96Not Applicable
- https://github.com/advisories/GHSA-fjm8-m7m6-2fjpNot Applicable
- https://github.com/advisories/GHSA-phjr-8j92-w5v7Not Applicable
- https://github.com/containerd/containerd/commit/133f6bb6cd827ce35a5fb279c1ead12bPatch
- https://github.com/containerd/containerd/releases/tag/v1.5.18Release Notes
- https://github.com/containerd/containerd/releases/tag/v1.6.18Release Notes
- https://github.com/containerd/containerd/security/advisories/GHSA-hmfx-3pcx-653pMitigationVendor Advisory
- https://github.com/moby/moby/security/advisories/GHSA-rc4r-wh2q-q6c4Not Applicable
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://www.benthamsgaze.org/2022/08/22/vulnerability-in-linux-containers-investExploitThird Party Advisory
- https://github.com/advisories/GHSA-4wjj-jwc9-2x96Not Applicable
- https://github.com/advisories/GHSA-fjm8-m7m6-2fjpNot Applicable
- https://github.com/advisories/GHSA-phjr-8j92-w5v7Not Applicable
FAQ
What is CVE-2023-25173?
CVE-2023-25173 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...
How severe is CVE-2023-25173?
CVE-2023-25173 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-25173?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Containerd.