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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (39.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Jupyterhub Systemdspawner — versions < 0.15
Weakness classification (CWE)
References
- github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6 (Third Party Advisory)
- github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f… (Patch, Third Party Advisory)
- github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md (Third Party Advisory, Release Notes)
- pypi.org/project/jupyterhub-systemdspawner/ (Product, Third Party Advisory)
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.