Amazon Linux 2023 Security Advisory: ALAS-2023-374
Advisory Release Date: 2023-09-27 21:07 Pacific
Advisory Updated Date: 2023-10-03 20:50 Pacific
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. (CVE-2023-25173)
Affected Packages:
containerd
Issue Correction:
Run dnf update containerd --releasever 2023.2.20231002 to update your system.
aarch64:
containerd-stress-debuginfo-1.7.2-1.amzn2023.0.1.aarch64
containerd-debuginfo-1.7.2-1.amzn2023.0.1.aarch64
containerd-stress-1.7.2-1.amzn2023.0.1.aarch64
containerd-1.7.2-1.amzn2023.0.1.aarch64
containerd-debugsource-1.7.2-1.amzn2023.0.1.aarch64
src:
containerd-1.7.2-1.amzn2023.0.1.src
x86_64:
containerd-stress-debuginfo-1.7.2-1.amzn2023.0.1.x86_64
containerd-debuginfo-1.7.2-1.amzn2023.0.1.x86_64
containerd-1.7.2-1.amzn2023.0.1.x86_64
containerd-stress-1.7.2-1.amzn2023.0.1.x86_64
containerd-debugsource-1.7.2-1.amzn2023.0.1.x86_64