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CVE-2022-36109

Published: August 31, 2023Last modified: August 31, 2023

Description

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.

Severity score breakdown

ParameterValue
Base score6.3
Attack VectorNETWORK
Attack complexityLOW
Privileges requiredLOW
User interactionNONE
ScopeUNCHANGED
ConfidentialityLOW
Integrity impactLOW
Availability impactLOW
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSdockerNot affected (20.10.24-r2)
StreamdockerNot affected (24.0.5-r1)

References

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