CVE-2023-40170: cross-site inclusion (XSSI) of files in jupyter-server

CVE-2023-40170 · Severity: low · CVSS 3.1 · Published 2023-08-28

jupyter-server is the backend for Jupyter web applications. Improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents, or accessing files when opening untrusted files via "Open image in new tab". This issue has been addressed in commit `87a49272728` which has been included in release `2.7.2`. Users are advised to upgrade. Users unable to upgrade may use the lower performance `--ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler`, which implements the correct checks.

Technologies: jupyter-server (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2023-40170 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2023-40170 being exploited in the wild.
How severe is CVE-2023-40170?
Low severity, with a CVSS score of 3.1, published 28 August 2023.
Which products and versions are affected?
jupyter-server (PyPI) ECOSYSTEM:introduced=0,fixed=2.7.2, GIT:introduced=0,fixed=87a4927272819f0b1cae1afa4c8c86ee2da002fd|ECOSYSTEM:introduced=0,fixed=2.7.2.
Is there a fix for CVE-2023-40170?
Yes. jupyter-server (PyPI): upgrade to 2.7.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2023-40170?
Check whether you run jupyter-server (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • jupyter-server (PyPI): upgrade to 2.7.2 or later
    pip install "jupyter-server>=2.7.2"

Affected products

  • jupyter-server (PyPI) ECOSYSTEM:introduced=0,fixed=2.7.2, GIT:introduced=0,fixed=87a4927272819f0b1cae1afa4c8c86ee2da002fd|ECOSYSTEM:introduced=0,fixed=2.7.2

Identifiers

  • CVE-2023-40170
  • GHSA-64x5-55rw-9974
  • PYSEC-2023-157

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