Known or guessable hidden files may be accessed in Jupyter Server

Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web applications like Jupyter Notebook. Prior to version 1.17.1, if notebook server is started with a value of `root_dir` that contains the starting user's home directory, then the underlying REST API can be used to leak the access token assigned at start time by guessing/brute forcing the PID of the jupyter server. While this requires an authenticated user session, this URL can be used from a cross-site scripting payload or from a hooked or otherwise compromised browser to leak this access token to a malicious third party. This token can be used along with the REST API to interact with Jupyter services/notebooks such as modifying or overwriting critical files, such as .bashrc or .ssh/authorized_keys, allowing a malicious user to read potentially sensitive data and possibly gain control of the impacted system. This issue is patched in version 1.17.1.

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

信息暴露

Jupyter Server 安全漏洞

Jupyter Server是Jupyter社区的一款用于为Jupyter Web应用提供后端服务的应用软件。 Jupyter Server 1.17.1之前版本存在安全漏洞。攻击者利用该漏洞将访问令牌泄漏给恶意的第三方，并修改或覆盖关键文件。

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