CVE-2021-41194 – jupyterhub-firstuseauthenticator

Package

Manager: pip
Name: jupyterhub-firstuseauthenticator
Vulnerable Version: >=0 <1.0.0

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00352 pctl0.56897

Details

Improper Access Control in jupyterhub-firstuseauthenticator ### Impact When JupyterHub is used with FirstUseAuthenticator, the vulnerability allows unauthorized access to any user's account if `create_users=True` and the username is known or guessed. ### Patches Upgrade to jupyterhub-firstuseauthenticator to 1.0, or apply patch https://github.com/jupyterhub/firstuseauthenticator/pull/38.patch ### Workarounds If you cannot upgrade, there is no complete workaround, but it can be mitigated. If you cannot upgrade yet, you can disable user creation with `c.FirstUseAuthenticator.create_users = False`, which will only allow login with fully normalized usernames for already existing users prior to jupyterhub-firstuserauthenticator 1.0. If any users have never logged in with their normalized username (i.e. lowercase), they will still be vulnerable until you can patch or upgrade.

Metadata

Created: 2021-10-28T23:13:57Z
Modified: 2024-09-24T21:11:48Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/10/GHSA-5xvc-vgmp-jgc3/GHSA-5xvc-vgmp-jgc3.json
CWE IDs: ["CWE-284"]
Alternative ID: GHSA-5xvc-vgmp-jgc3
Finding: F039
Auto approve: 1