OAuthenticator is an OAuth login mechanism for JupyterHub. In oauthenticator from version 0.12.0 and before 0.12.2, the deprecated (in jupyterhub 1.2) configuration `Authenticator.whitelist`, which should be transparently mapped to `Authenticator.allowed_users` with a warning, is instead ignored by OAuthenticator classes, resulting in the same behavior as if this configuration has not been set. If this is the only mechanism of authorization restriction (i.e. no group or team restrictions in configuration) then all authenticated users will be allowed. Provider-based restrictions, including deprecated values such as `GitHubOAuthenticator.org_whitelist` are **not** affected. All users of OAuthenticator 0.12.0 and 0.12.1 with JupyterHub 1.2 (JupyterHub Helm chart 0.10.0-0.10.5) who use the `admin.whitelist.users` configuration in the jupyterhub helm chart or the `c.Authenticator.whitelist` configuration directly. Users of other deprecated configuration, e.g. `c.GitHubOAuthenticator.team_whitelist` are **not** affected. If you see a log line like this and expect a specific list of allowed usernames: "[I 2020-11-27 16:51:54.528 JupyterHub app:1717] Not using allowed_users. Any authenticated user will be allowed." you are likely affected. Updating oauthenticator to 0.12.2 is recommended. A workaround is to replace the deprecated `c.Authenticator.whitelist = ...` with `c.Authenticator.allowed_users = ...`. If any users have been authorized during this time who should not have been, they must be deleted via the API or admin interface, per the referenced documentation.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - OAuthenticator is an OAuth login mechanism for JupyterHub. In oauthenticator from version 0.12.0 and
    before 0.12.2, the deprecated (in jupyterhub 1.2) configuration `Authenticator.whitelist`, which should be
    transparently mapped to `Authenticator.allowed_users` with a warning, is instead ignored by OAuthenticator
    classes, resulting in the same behavior as if this configuration has not been set. If this is the only
    mechanism of authorization restriction (i.e. no group or team restrictions in configuration) then all
    authenticated users will be allowed. Provider-based restrictions, including deprecated values such as
    `GitHubOAuthenticator.org_whitelist` are **not** affected. All users of OAuthenticator 0.12.0 and 0.12.1
    with JupyterHub 1.2 (JupyterHub Helm chart 0.10.0-0.10.5) who use the `admin.whitelist.users`
    configuration in the jupyterhub helm chart or the `c.Authenticator.whitelist` configuration directly.
    Users of other deprecated configuration, e.g. `c.GitHubOAuthenticator.team_whitelist` are **not**
    affected. If you see a log line like this and expect a specific list of allowed usernames: "[I 2020-11-27
    16:51:54.528 JupyterHub app:1717] Not using allowed_users. Any authenticated user will be allowed." you
    are likely affected. Updating oauthenticator to 0.12.2 is recommended. A workaround is to replace the
    deprecated `c.Authenticator.whitelist = ...` with `c.Authenticator.allowed_users = ...`. If any users have
    been authorized during this time who should not have been, they must be deleted via the API or admin
    interface, per the referenced documentation. (CVE-2020-26250)

ID	Name	Product	Family	Severity
409386	SCA: security update for oauthenticator (GHSA-384w-5v3f-q499)	Tenable Cloud Security	SCA Checks	high
409386	SCA: security update for oauthenticator (GHSA-384w-5v3f-q499)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2020-26250

high

Tenable Plugins

high

high