Bug 2235740 (CVE-2023-40170)

Summary:	CVE-2023-40170 python-jupyter-server: improper cross-site credential checks on `/files/` URLs could allow exposure of certain file contents
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	python-jupyter-server 2.7.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2235741, 2236244
Bug Blocks:

Description Marian Rehak 2023-08-29 15:27:01 UTC

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.

https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-64x5-55rw-9974
https://github.com/jupyter-server/jupyter_server/commit/87a4927272819f0b1cae1afa4c8c86ee2da002fd

Comment 1 Marian Rehak 2023-08-29 15:27:13 UTC

Created python-jupyter-server tracking bugs for this issue:

Affects: fedora-38 [bug 2235741]