Bug 2024189 (CVE-2021-41247)

Summary:	CVE-2021-41247 juptyerhub: Incomplete JupyterHub logout with simultaneous JupyterLab sessions
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	jupyterhub 1.5	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2022357

Description Pedro Sampaio 2021-11-17 14:21:20 UTC

Users of JupyterLab with JupyterHub who have multiple JupyterLab tabs open in the same browser session, may see incomplete logout from the single-user server, as fresh credentials (for the single-user server only, not the Hub) reinstated after logout, if another active JupyterLab session is open while the logout takes place.

Upstream commit:

https://github.com/jupyterhub/jupyterhub/commit/5ac9e7f73a6e1020ffddc40321fc53336829fe27

References:

https://github.com/jupyterhub/jupyterhub/security/advisories/GHSA-cw7p-q79f-m2v7

Comment 1 juneau 2021-11-17 17:28:50 UTC

Marking RHODS affected due to presence of affected code. Deferring to engineering as impact is moderate.