Home/CVE/jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemds
CVE

CVE-2020-26261

jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemds

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.

HIGH · CVSS 7.9 EPSS 0.00162
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-668Exposure of Resource to Wrong Sphere
CWE-668Exposure of Resource to Wrong Sphere
▤

Affected Products & Versions

1
jupyterhub systemdspawner< 0.15
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI jupyterhub-systemdspawner HIGH fixed in 0.15.0
▣

Scoring & Timeline

7.9
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Dec 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015Release NotesThird Party Advisory
https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580PatchThird Party Advisory
https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6Third Party Advisory
https://pypi.org/project/jupyterhub-systemdspawner/ProductThird Party Advisory
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