Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where supplementary groups are not set up properly. 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. This bug is fixed in Moby (Docker Engine) 20.10.18. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade, this problem can be worked around by not using the `"USER $USERNAME"` Dockerfile instruction. Instead by calling `ENTRYPOINT ["su", "-", "user"]` the supplementary groups will be set up properly.
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History
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2022-09-09T17:20:11
Updated: 2024-08-03T09:52:00.643Z
Reserved: 2022-07-15T00:00:00
Link: CVE-2022-36109
Vulnrichment
No data.
NVD
Status : Modified
Published: 2022-09-09T18:15:10.540
Modified: 2024-11-21T07:12:24.560
Link: CVE-2022-36109
Redhat