Vulnerability CVE-2018-7206
Published: 2018-02-17   Modified: 2018-02-18

Description:
An issue was discovered in Project Jupyter JupyterHub OAuthenticator 0.6.x before 0.6.2 and 0.7.x before 0.7.3. When using JupyterHub with GitLab group whitelisting for access control, group membership was not checked correctly, allowing members not in the whitelisted groups to create accounts on the Hub. (Users were not allowed to access other users' accounts, but could create their own accounts on the Hub linked to their GitLab account. GitLab authentication not using gitlab_group_whitelist is unaffected. No other Authenticators are affected.)

Type:

CWE-noinfo

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.5/10
6.4/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Jupyter -> Oauthenticator 

 References:
https://blog.jupyter.org/security-fix-for-jupyterhub-gitlab-oauthenticator-7b14571d1f76
https://github.com/jupyterhub/oauthenticator/blob/8499dc2/CHANGELOG.md#073---2018-02-16
https://github.com/jupyterhub/oauthenticator/commit/1845c0e4b1bff3462c91c3108c85205acd3c75a2
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