CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
54.7%
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
arenot 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.
[
{
"product": "oauthenticator",
"vendor": "jupyterhub",
"versions": [
{
"status": "affected",
"version": ">= 0.12.0, < 0.12.2"
}
]
}
]
github.com/jupyterhub/oauthenticator/blob/master/docs/source/changelog.md#0122---2020-11-30
github.com/jupyterhub/oauthenticator/commit/a4aac191c16cf6281f3d346615aefa75702b02d7
github.com/jupyterhub/oauthenticator/security/advisories/GHSA-384w-5v3f-q499
jupyterhub.readthedocs.io/en/1.2.2/getting-started/authenticators-users-basics.html#add-or-remove-users-from-the-hub
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
54.7%