CVE-2023-25173

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen im Red Hat Enterprise Linux Migration Toolkit for Containers ausnutzen, um beliebigen Programmcode auszuführen oder einen Denial of Service Zustand herbeizuführen.

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um einen Denial of Service Angriff durchzuführen, beliebigen Programmcode auszuführen oder Informationen offenzulegen.

Ein Angreifer kann mehrere Schwachstellen in IBM MQ Operator and Queue manager ausnutzen, um einen Denial of Service Angriff durchzuführen, Informationen offenzulegen oder Sicherheitsmaßnahmen zu umgehen.

Ein Angreifer kann mehrere Schwachstellen in Juniper JUNOS ausnutzen, um einen Denial of Service zu verursachen, Informationen offenzulegen, Privilegien zu erweitern und Sicherheitsmechanismen inklusive zu umgehen.

### Impact A bug was found in containerd 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. ### Patches 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. ### Workarounds 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. ### References - https://www.benthamsgaze.org/2022/08/22/vulnerability-in-linux-containers-investigation-and-mitigation/ - Docker/Moby: CVE-2022-36109, fixed in Docker 20.10.18 - CRI-O: CVE-2022-2995, fixed in CRI-O 1.25.0 - Podman: CVE-2022-2989, fixed in Podman 3.0.1 and 4.2.0 - Buildah: CVE-2022-2990, fixed in Buildah 1.27.1 Note that CVE IDs apply to a particular implementation, even if an issue is common. ### For more information If you have any questions or comments about this advisory: * Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose) * Email us at [security@containerd.io](mailto:security@containerd.io) To report a security issue in containerd: * [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new) * Email us at [security@containerd.io](mailto:security@containerd.io)

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 and potentially escalate privileges in the container. Uses of the containerd client library may also have improperly setup supplementary groups.