FirstUseAuthenticator prior 1.0.0 access control

CVE编号

CVE-2021-41194

利用情况

暂无

补丁情况

N/A

披露时间

2021-10-29

漏洞描述

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.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://github.com/jupyterhub/firstuseauthenticator/pull/38
https://github.com/jupyterhub/firstuseauthenticator/pull/38.patch
https://github.com/jupyterhub/firstuseauthenticator/security/advisories/GHSA-...

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	应用	jupyterhub	first_use_authenticator	*		Up to (excluding) 1.0.0

CVSS3评分 9.8

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 影响范围 未更改
• 用户交互 无
• 可用性 高
• 保密性 高
• 完整性 高

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CWE-ID 漏洞类型 NVD-CWE-noinfo