CVE-2021-41194

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Summary

CVECVE-2021-41194
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-10-28 20:15:00 UTC
Updated2021-11-03 12:26:00 UTC
DescriptionFirstUseAuthenticator is a JupyterHub authenticator that helps new users set their password on their first login to JupyterHub. When JupyterHub is used with FirstUseAuthenticator, a vulnerability in versions prior to 1.0.0 allows unauthorized access to any user's account if `create_users=True` and the username is known or guessed. One may upgrade to version 1.0.0 or apply a patch manually to mitigate the vulnerability. For those who cannot upgrade, there is no complete workaround, but a partial mitigation exists. One 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 1.0.0. If any users have never logged in with their normalized username (i.e. lowercase), they will still be vulnerable until a patch or upgrade occurs.

Risk And Classification

Problem Types: NVD-CWE-noinfo

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Jupyterhub First Use Authenticator All All All All

References

ReferenceSourceLinkTags
normalize username to lock password by georgejhunt · Pull Request #38 · jupyterhub/firstuseauthenticator · GitHub MISC github.com
github.com/jupyterhub/firstuseauthenticator/pull/38.patch MISC github.com
Improper Access Control in jupyterhub-firstuseauthenticator · Advisory · jupyterhub/firstuseauthenticator · GitHub CONFIRM github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 980217 Python (pip) Security Update for jupyterhub-firstuseauthenticator (GHSA-5xvc-vgmp-jgc3)
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