CVE-2020-26250

See a problem?
Source
https://nvd.nist.gov/vuln/detail/CVE-2020-26250
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26250.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-26250
Aliases
Published
2020-12-01T21:15:14Z
Modified
2024-05-30T02:33:13.747720Z
Severity
  • 6.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/jupyterhub/oauthenticator

Affected ranges

Type
GIT
Repo
https://github.com/jupyterhub/oauthenticator
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed

Affected versions

0.*

0.10.0
0.11.0
0.12.0
0.12.1
0.2.0
0.3.0
0.4.0
0.4.1
0.5.0
0.5.1
0.6.0
0.6.1
0.7.0
0.7.1
0.7.2
0.8.0
0.8.1
0.8.2