CVE-2020-26261 HIGH

CVE-2020-26261: user-readable api tokens in systemd units

Vendor Jupyterhub
Product systemdspawner
Weakness CWE-668
Published December 9, 2020
Last update August 4, 2024
View on NVD All CVEs

CVSS base score

7.9/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

December 9, 2020 CVE published
August 4, 2024 Record updated