CVE-2020-26275 Information

Description

The Jupyter Server provides the backend (i.e. the core services APIs and REST endpoints) for Jupyter web applications like Jupyter notebook JupyterLab and Voila. In Jupyter Server before version 1.1.1 an open redirect vulnerability could cause the jupyter server to redirect the browser to a different malicious website. All jupyter servers running without a base_url prefix are technically affected however these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may appear safe but ultimately redirect to a spoofed server on the public internet. This same vulnerability was patched in upstream notebook v5.7.8. This is fixed in jupyter_server 1.1.1. If upgrade is not available a workaround can be to run your server on a url prefix: \jupyter server –ServerApp.base_url=/jupyter/.

CVSS Vector

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

Reference

https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-9f66-54xg-pc2c https://pypi.org/project/jupyter-server/ https://github.com/jupyter-server/jupyter_server/commit/85e4abccf6ea9321d29153f73b0bd72ccb3a6bca https://advisory.checkmarx.net/advisory/CX-2020-4291 The Jupyter Server provides the backend (i.e. the core services APIs and REST endpoints) for Jupyter web applications like Jupyter notebook JupyterLab and Voila. In Jupyter Server before version 1.1.1 an open redirect vulnerability could cause the jupyter server to redirect the browser to a different malicious website. All jupyter servers running without a base_url prefix are technically affected however these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may appear safe but ultimately redirect to a spoofed server on the public internet. This same vulnerability was patched in upstream notebook v5.7.8. This is fixed in jupyter_server 1.1.1. If upgrade is not available a workaround can be to run your server on a url prefix: \jupyter server –ServerApp.base_url=/jupyter/.

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

6.1