CVE-2020-26261High· 7.9▾ Twilightuser-readable api tokens in systemd units for JupyterHub
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 43.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.5%
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.
Patched in jupyterhub-systemdspawner v0.15
No workaround other than upgrading systemdspawner to 0.15
If you have any questions or comments about this advisory:
jupyterhub-systemdspawner < 0.15.0Upgrade to a patched release:
jupyterhub-systemdspawner 0.15.0