CVE-2023-25173 Information

Feb 17, 2023 cve

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 SER $USERNAME\ Dockerfile instruction is not used. Instead set the container entrypoint to a value similar to ENTRYPOINT [\su\ \-\ ser\] to allow su to properly set up supplementary groups.

Reference

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