CVE-2023-40170: cross-site inclusion (XSSI) of files in jupyter-server
First published: Mon Aug 28 2023(Updated: )
### 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](https://app.intigriti.com/programs/jupyter/jupyter/detail) [sponsored by the European Commission](https://commission.europa.eu/news/european-commissions-open-source-programme-office-starts-bug-bounties-2022-01-19_en) and hosted on the [Intigriti platform](https://www.intigriti.com/).
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/jupyter-server | <2.7.2 | 2.7.2 |
| Jupyter Server Proxy | <2.7.2 |
Remedy
https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd
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Reference Links
- https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd
- https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-64x5-55rw-9974
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NRP7DNZYVOIA4ZB3U3ZWKTFZEPYWNGCQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XDKQAWQN6SQTOVACZNXYKEHWQXGG4DOF/
- https://nvd.nist.gov/vuln/detail/CVE-2023-40170
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyter-server/PYSEC-2023-157.yaml
- https://github.com/advisories/GHSA-64x5-55rw-9974 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-40170?
The severity of CVE-2023-40170 is medium with a CVSS score of 6.1.
How can CVE-2023-40170 impact my system?
CVE-2023-40170 could allow exposure of certain file contents or unauthorized access to files when opening untrusted files via "Open image in new tab".
Which software versions are affected by CVE-2023-40170?
Versions up to and excluding 2.7.2 of Jupyter Server and Jupyter Jupyter Server are affected by CVE-2023-40170.
How can I fix CVE-2023-40170?
To fix CVE-2023-40170, update Jupyter Server to version 2.7.2 or apply the available patch.
Are there any workarounds for CVE-2023-40170?
A workaround for CVE-2023-40170 is to use the lower performance `--ContentsManager.files_handler` option.
- collector/github-advisory-latest
- alias/GHSA-64x5-55rw-9974
- alias/CVE-2023-40170
- collector/github-advisory
- agent/type
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- collector/mitre-cve
- source/MITRE
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- collector/nvd-cve
- agent/software-canonical-lookup-request
- collector/nvd-api
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- package-manager/pip
- vendor/jupyter
- canonical/jupyter server proxy