CVE-2020-26261 Information

Description

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

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Reference

https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6 https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580 https://pypi.org/project/jupyterhub-systemdspawner/ https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.9