jupyterhub up to 4.1.5/5.1.0 Group Membership insufficient privileges

Summaryinfo

A vulnerability was found in jupyterhub up to 4.1.5/5.1.0. It has been rated as critical. Affected is an unknown function of the component Group Membership Handler. Performing a manipulation results in insufficient privileges. This vulnerability is reported as CVE-2024-41942. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in jupyterhub up to 4.1.5/5.1.0. This affects an unknown function of the component Group Membership Handler. The manipulation with an unknown input leads to a insufficient privileges vulnerability. CWE is classifying the issue as CWE-274. The product does not handle or incorrectly handles when it has insufficient privileges to perform an operation, leading to resultant weaknesses. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

JupyterHub is software that allows one to create a multi-user server for Jupyter notebooks. Prior to versions 4.1.6 and 5.1.0, if a user is granted the `admin:users` scope, they may escalate their own privileges by making themselves a full admin user. The impact is relatively small in that `admin:users` is already an extremely privileged scope only granted to trusted users. In effect, `admin:users` is equivalent to `admin=True`, which is not intended. Note that the change here only prevents escalation to the built-in JupyterHub admin role that has unrestricted permissions. It does not prevent users with e.g. `groups` permissions from granting themselves or other users permissions via group membership, which is intentional. Versions 4.1.6 and 5.1.0 fix this issue.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2024-41942 since 07/24/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 4.1.6 or 5.1.0 eliminates this vulnerability.

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Productinfo

Name

• jupyterhub

Version

• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 5.0
• 5.1.0

Website

• Product: https://github.com/jupyterhub/jupyterhub/

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