Vulnerability in Jupyterhub Systemdspawner
CVE-2020-26261
jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemdspawner before version 0.15 user API tokens issued to single-user servers are specified in the environment of systemd units. These tokens are incorrectly accessible to all users. In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default. This is patched in jupyterhub-systemdspawner v0.15
EPSS: 0.005 (38.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Jupyterhub Systemdspawner — versions < 0.15
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-26261?
- CVE-2020-26261 is a high-severity vulnerability in Jupyterhub Systemdspawner, classified under Exposure of Resource to Wrong Sphere. CVSS score: 7.9/10. Published 2020-12-09.
- How severe is CVE-2020-26261?
- High severity. CVSS v3 base score is 7.9 out of 10.