High, CVSS 7.6PyPIAmendedPublished
Possible pod name collisions in jupyterhub-kubespawner
CVE-2020-15110 · GHSA-v7m9-9497-p9gr
- Affected
- PyPI jupyterhub-kubespawner <= 0.11.1
- Fixed in
- 0.12.0· Vendor fix available
- Issue
- Impact What kind of vulnerability is it? Who is impacted? JupyterHub deployments using: - KubeSpawner <= 0.11.1 (e.g. zero-to-jupyterhub 0.9.0) and - enabled namedservers (not default), and - an Authenticator that allows: - usernames with hyphens or other characters that require escape (e.g. user-hyphen or user@email), and - usernames which may match other usernames up to but not including the escaped character (e.g. user in the above cases) In this circumstance, certain usernames will be able to craft particular server names which will grant them access to the default server of other users who have matching usernames. Patches Has the problem been patched? What versions should users upgrade to? Patch will be released in kubespawner 0.12 and zero-to-jupyterhub 0.9.1 Workarounds Is there a way for users to fix or remediate the vulnerability without upgrading? KubeSpawner Specify configuration: for KubeSpawner Note for KubeSpawner: this configuration will behave differently before and…
Recommended action: Upgrade to 0.12.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.