Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-41194— Improper Access Control in jupyterhub-firstuseauthenticator

Quick assessment

Affected
jupyterhub firstuseauthenticator
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

JupyterHub是JupyterHub开源的一款用于Jupyter的多用户服务器。 JupyterHub 1.0.0之前版本存在安全漏洞，该漏洞源于当JupyterHub与FirstUseAuthenticator一起使用时，允许未经授权访问任何用户的帐户。

CVSS 9.1 · Critical EPSS 1.37% · P71
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-41194

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Improper Access Control in jupyterhub-firstuseauthenticator
Source: CVE Program / CVE List V5
Vulnerability Description
FirstUseAuthenticator is a JupyterHub authenticator that helps new users set their password on their first login to JupyterHub. When JupyterHub is used with FirstUseAuthenticator, a vulnerability in versions prior to 1.0.0 allows unauthorized access to any user's account if `create_users=True` and the username is known or guessed. One may upgrade to version 1.0.0 or apply a patch manually to mitigate the vulnerability. For those who cannot upgrade, there is no complete workaround, but a partial mitigation exists. One can disable user creation with `c.FirstUseAuthenticator.create_users = False`, which will only allow login with fully normalized usernames for already existing users prior to jupyterhub-firstuserauthenticator 1.0.0. If any users have never logged in with their normalized username (i.e. lowercase), they will still be vulnerable until a patch or upgrade occurs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
JupyterHub 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
JupyterHub是JupyterHub开源的一款用于Jupyter的多用户服务器。 JupyterHub 1.0.0之前版本存在安全漏洞，该漏洞源于当JupyterHub与FirstUseAuthenticator一起使用时，允许未经授权访问任何用户的帐户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jupyterhub firstuseauthenticator < 1.0.0 -

II. Public POCs for CVE-2021-41194

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-41194

请登录查看更多情报信息。

Patches & Fixes for CVE-2021-41194 (2)

Vendor Advisories for CVE-2021-41194 (1)

IV. Related Vulnerabilities

Same vendor: jupyterhub
Same weakness: CWE-284

V. Comments for CVE-2021-41194

No comments yet

Leave a comment