CVE-2021-39159

Description

BinderHub is a kubernetes-based cloud service that allows users to share reproducible interactive computing environments from code repositories. In affected versions a remote code execution vulnerability has been identified in BinderHub, where providing BinderHub with maliciously crafted input could execute code in the BinderHub context, with the potential to egress credentials of the BinderHub deployment, including JupyterHub API tokens, kubernetes service accounts, and docker registry credentials. This may provide the ability to manipulate images and other user created pods in the deployment, with the potential to escalate to the host depending on the underlying kubernetes configuration. Users are advised to update to version 0.2.0-n653. If users are unable to update they may disable the git repo provider by specifying the `BinderHub.repo_providers` as a workaround.

How to fix CVE-2021-39159

To remediate CVE-2021-39159, upgrade the affected package to a fixed version below.

• —upgrade to 0.2.0 or later
• —upgrade to 195caac172690456dcdc8cc7a6ca50e05abf8182.patch or later

Is CVE-2021-39159 being exploited?

Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 0.2.0
• from 0, < 195caac172690456dcdc8cc7a6ca50e05abf8182.patch | from 0, < 0.2.0-n653

CVSS scores

References (6)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-39159
• PATCHgithub.com/jupyterhub/binderhub
• WEBgithub.com/jupyterhub/binderhub/commit/195caac172690456dcdc8cc7a6ca50e05abf8182
• WEBgithub.com/jupyterhub/binderhub/commit/195caac172690456dcdc8cc7a6ca50e05abf8182.patch