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

December 9, 2020 (updated September 27, 2024)

user API tokens issued to single-user servers are specified in the environment of systemd units, which are accessible to all users.

In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default.

References

  • github.com/advisories/GHSA-cg54-gpgr-4rm6
  • github.com/jupyterhub/systemdspawner
  • github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md
  • github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580
  • github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6
  • github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-systemdspawner/PYSEC-2020-52.yaml
  • nvd.nist.gov/vuln/detail/CVE-2020-26261
  • pypi.org/project/jupyterhub-systemdspawner

Code Behaviors & Features

Detect and mitigate CVE-2020-26261 with GitLab Dependency Scanning

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Affected versions

All versions before 0.15.0

Fixed versions

  • 0.15.0

Solution

Upgrade to version 0.15.0 or above.

Impact 7.9 HIGH

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

Learn more about CVSS

Weakness

  • CWE-668: Exposure of Resource to Wrong Sphere

Source file

pypi/jupyterhub-systemdspawner/CVE-2020-26261.yml

Spotted a mistake? Edit the file on GitLab.

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