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cross-site inclusion (XSSI) of files in jupyter-server

Moderate severity GitHub Reviewed Published Aug 28, 2023 in jupyter-server/jupyter_server • Updated Nov 11, 2023

Package

pip jupyter-server (pip)

Affected versions

< 2.7.2

Patched versions

2.7.2

Description

Impact

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".

Patches

Jupyter Server 2.7.2

Workarounds

Use lower performance --ContentsManager.files_handler_class=jupyter_server.files.handlers.FilesHandler, which implements the correct checks.

References

Upstream patch for CVE-2019-9644 was not applied completely, leaving part of the vulnerability open.

Vulnerability reported by Tim Coen via the bug bounty program sponsored by the European Commission and hosted on the Intigriti platform.

References

@Zsailer Zsailer published to jupyter-server/jupyter_server Aug 28, 2023
Published by the National Vulnerability Database Aug 28, 2023
Published to the GitHub Advisory Database Aug 29, 2023
Reviewed Aug 29, 2023
Last updated Nov 11, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

EPSS score

0.084%
(38th percentile)

Weaknesses

CVE ID

CVE-2023-40170

GHSA ID

GHSA-64x5-55rw-9974

Source code

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