Vulnerability · Published Nov 4, 2021 · Assigned by GitHub_M
CVE-2021-41247incomplete logout in JupyterHub
Low 3.5
In plain English
A low-severity security flaw in jupyterhub from jupyterhub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
JupyterHub is an open source multi-user server for Jupyter notebooks. In affected versions users 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. Upgrade to JupyterHub 1.5. For distributed deployments, it is jupyterhub in the _user_ environment that needs patching. There are no patches necessary in the Hub environment. The only workaround is to make sure that only one JupyterLab tab is open when you log out.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | jupyterhub | 2.0.0+ds1-1 | DEBIAN-CVE-2021-41247 |
| Debian:13 | jupyterhub | 2.0.0+ds1-1 | DEBIAN-CVE-2021-41247 |
| Debian:14 | jupyterhub | 2.0.0+ds1-1 | DEBIAN-CVE-2021-41247 |
| PyPI | jupyterhub | 1.5.0 | GHSA-cw7p-q79f-m2v7 |
| PyPI | jupyterhub | 1.5.0 | PYSEC-2021-386 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| jupyterhub | jupyterhub | >= 1.0.0, < 1.5.0 - jupyterhub (pip)< 1.2.0 - jupyterhub (helm) |
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N