CVE-2024-41942
JupyterHub has a privilege escalation vulnerability with the `admin:users` scope
Impact
### Summary If a user is granted the `admin:users` scope, they may escalate their own privileges by making themselves a full admin user. ### Details The `admin:users` scope allows a user to edit user records: > admin:users > > Read, write, create and delete users and their authentication state, not including their servers or tokens. > > -- https://jupyterhub.readthedocs.io/en/stable/rbac/scopes.html#available-scopes However, this includes making users admins. Admin users are granted scopes beyond `admin:users` making this a mechanism by which granted scopes may be escalated. ### Impact 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | jupyterhub | < 4.1.6 | 4.1.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Jupyter | Jupyterhub | before 4.1.6 Version 5.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/jupyterhub/jupyterhub/commit/99e2720b0fc626cbeeca3c6337f917fdacfaa428
- https://github.com/jupyterhub/jupyterhub/commit/ff2db557a85b6980f90c3158634bf924063ab8ba
- https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-9x4q-3gxw-849f
- https://github.com/advisories/GHSA-9x4q-3gxw-849f
- https://nvd.nist.gov/vuln/detail/CVE-2024-41942
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub/PYSEC-2024-200.yaml