CVSS 3.1 Score 4.3 of 10 (medium)


Published Dec 8, 2023
Updated: Dec 13, 2023


CVE-2023-48311 is a vulnerability affecting dockerspawner, a tool used to spawn JupyterHub single user servers in Docker containers. Users of JupyterHub deployments running DockerSpawner version 0.11.0 without specifying the `DockerSpawner.allowed_images` configuration are at risk. This vulnerability allows users to launch any pullable docker image instead of being restricted to the single configured image as intended. The issue has been addressed in commit `3ba4b665b`, included in dockerspawner release version 13. Users are advised to upgrade to the latest version to remediate this vulnerability. Failure to upgrade requires explicitly setting `DockerSpawner.allowed_images` to a non-empty list containing only the default image in order to retain the intended default behavior. The potential danger this vulnerability poses is rated as medium severity with a base score of 4.3 out of 10, according to NIST's National Vulnerability Database (NVD).


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