CVE-2022-31027
published 2022-06-09CVE-2022-31027: OAuthenticator is an OAuth token library for the JupyerHub login handler. CILogonOAuthenticator is provided by the OAuthenticator package, and lets users log…
PriorityP336medium6.5CVSS 3.1
AVNACLPRLUINSUCHINAN
EPSS
0.43%
34.7th percentile
OAuthenticator is an OAuth token library for the JupyerHub login handler. CILogonOAuthenticator is provided by the OAuthenticator package, and lets users log in to a JupyterHub via CILogon. This is primarily used to restrict a JupyterHub only to users of a given institute. The allowed_idps configuration trait of CILogonOAuthenticator is documented to be a list of domains that indicate the institutions whose users are authorized to access this JupyterHub. This authorization is validated by ensuring that the *email* field provided to us by CILogon has a *domain* that matches one of the domains listed in `allowed_idps`.If `allowed_idps` contains `berkeley.edu`, you might expect only users with valid current credentials provided by University of California, Berkeley to be able to access the JupyterHub. However, CILogonOAuthenticator does *not* verify which provider is used by the user to login, only the email address provided. So a user can login with a GitHub account that has email set to `@berkeley.edu`, and that will be treated exactly the same as someone logging in using the UC Berkeley official Identity Provider. The patch fixing this issue makes a *breaking change* in how `allowed_idps` is interpreted. It's no longer a list of domains, but configuration representing the `EntityID` of the IdPs that are allowed, picked from the [list maintained by CILogon](https://cilogon.org/idplist/). Users are advised to upgrade.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| jupyter | oauthenticator | < 15.0.0 | 15.0.0 |
| jupyterhub | oauthenticator | < 15.0.0 | 15.0.0 |
| jupyterhub | oauthenticator | >= 0 < 15.0.0 | 15.0.0 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:P/I:N/A:N
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OSV
CVE-2022-31027: OAuthenticator is an OAuth token library for the JupyerHub login handler
osv·2022-06-09
CVE-2022-31027 CVE-2022-31027: OAuthenticator is an OAuth token library for the JupyerHub login handler
OAuthenticator is an OAuth token library for the JupyerHub login handler. CILogonOAuthenticator is provided by the OAuthenticator package, and lets users log in to a JupyterHub via CILogon. This is primarily used to restrict a JupyterHub only to users of a given institute. The allowed_idps configuration trait of CILogonOAuthenticator is documented to be a list of domains that indicate the institutions whose users are authorized to access this JupyterHub. This authorization is validated by ensuring that the *email* field provided to us by CILogon has a *domain* that matches one of the domains listed in `allowed_idps`.If `allowed_idps` contains `berkeley.edu`, you might expect only users with valid current credentials provided by University of California, Berkeley to be able to access the Ju
GHSA
Authorization Bypass Through User-Controlled Key when using CILogonOAuthenticator oauthenticator
ghsa·2022-06-06
CVE-2022-31027 [MEDIUM] CWE-639 Authorization Bypass Through User-Controlled Key when using CILogonOAuthenticator oauthenticator
Authorization Bypass Through User-Controlled Key when using CILogonOAuthenticator oauthenticator
# Background
CILogon is a federated auth provider that allows users to authenticate
themselves via a number of Identity Providers (IdP), focused primarily on educational and
research institutions (such as Universities). More traditional and open IdPs
such as GitHub, ORCID, Google, Microsoft, etc are also supported.
CILogonOAuthenticator is provided by the OAuthenticator package, and lets users log
in to a JupyterHub via CILogon. This is primarily used to restrict a JupyterHub
only to users of a given institute. The allowed_idps configuration trait of
CILogonOAuthenticator is documented to be a list of domains that indicate the
institutions whose users are authorized to access this JupyterHub
OSV
Authorization Bypass Through User-Controlled Key when using CILogonOAuthenticator oauthenticator
osv·2022-06-06
CVE-2022-31027 [MEDIUM] Authorization Bypass Through User-Controlled Key when using CILogonOAuthenticator oauthenticator
Authorization Bypass Through User-Controlled Key when using CILogonOAuthenticator oauthenticator
# Background
CILogon is a federated auth provider that allows users to authenticate
themselves via a number of Identity Providers (IdP), focused primarily on educational and
research institutions (such as Universities). More traditional and open IdPs
such as GitHub, ORCID, Google, Microsoft, etc are also supported.
CILogonOAuthenticator is provided by the OAuthenticator package, and lets users log
in to a JupyterHub via CILogon. This is primarily used to restrict a JupyterHub
only to users of a given institute. The allowed_idps configuration trait of
CILogonOAuthenticator is documented to be a list of domains that indicate the
institutions whose users are authorized to access this JupyterHub
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2022-06-09
Published