CVE-2020-26261: user-readable api tokens in systemd units
First published: Wed Dec 09 2020(Updated: )
### Impact 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. ### Patches Patched in jupyterhub-systemdspawner v0.15 ### Workarounds No workaround other than upgrading systemdspawner to 0.15 ### For more information If you have any questions or comments about this advisory: * Open a thread in [the Jupyter forum](https://discourse.jupyter.org) * Email us at [security@ipython.org](mailto:security@ipython.org)
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/jupyterhub-systemdspawner | <0.15.0 | 0.15.0 |
| IBM Cognos Analytics | <=12.0.0-12.0.3 | |
| IBM Cognos Analytics | <=11.2.0-11.2.4 FP4 | |
| JupyterHub systemdspawner | <0.15 |
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Reference Links
- https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015
- https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580
- https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6
- https://pypi.org/project/jupyterhub-systemdspawner/
- https://nvd.nist.gov/vuln/detail/CVE-2020-26261
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-systemdspawner/PYSEC-2020-52.yaml
- https://pypi.org/project/jupyterhub-systemdspawner
- https://github.com/advisories/GHSA-cg54-gpgr-4rm6 (Advisory)
- https://www.ibm.com/support/pages/node/7177223 (Advisory)
Frequently Asked Questions
What is CVE-2020-26261?
CVE-2020-26261 is a vulnerability in jupyterhub-systemdspawner that allows unauthorized access to user API tokens.
How does CVE-2020-26261 affect JupyterHub?
CVE-2020-26261 affects JupyterHub by incorrectly exposing user API tokens to all users.
What is the severity of CVE-2020-26261?
The severity of CVE-2020-26261 is high with a CVSS score of 7.9.
How can I fix CVE-2020-26261?
To fix CVE-2020-26261, update jupyterhub-systemdspawner to version 0.15 or newer.
Where can I find more information about CVE-2020-26261?
You can find more information about CVE-2020-26261 in the official GitHub repository of jupyterhub-systemdspawner.
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