The vulnerability depends on user interaction by opening a malicious notebook with Markdown cells, or Markdown file using JupyterLab preview feature.
A malicious user can access any data accessible from JupyterLite and perform arbitrary actions in JupyterLite environment.
JupyterLite 0.4.1 was patched.
There is no workaround for the underlying DOM Clobbering susceptibility. However, select plugins can be disabled on deployments which cannot update in a timely fashion to minimise the risk. These are:
- @jupyterlab/mathjax-extension:plugin
- users will loose ability to preview mathematical equations
- @jupyterlab/markdownviewer-extension:plugin
- users will loose ability to open Markdown previews
- @jupyterlab/mathjax2-extension:plugin
(if installed with optional jupyterlab-mathjax2
package) - an older version of the mathjax plugin for JupyterLab 4.x
To disable these extensions populate the disabledExtensions
key in jupyter-config-data
stanza of jupyter-lite.json
as documented on https://jupyterlite.readthedocs.io/en/stable/howto/configure/config_files.html#jupyter-lite-json
{
"jupyter-lite-schema-version": 0,
"jupyter-config-data": {
"appName": "My JupyterLite App",
"disabledExtensions": [
"@jupyterlab/markdownviewer-extension:plugin",
"@jupyterlab/mathjax-extension:plugin",
"@jupyterlab/mathjax2-extension:plugin"
]
}
}
To confirm that the plugins were disabled manual inspection of the built page is required.
Upstream advisory: https://github.com/jupyterlab/jupyterlab/security/advisories/GHSA-9q39-rmj3-p4r2
This change has a potential to break rendering of some markdown. There is a setting in Sanitizer which allows to revert to the previous sanitizer settings (allowNamedProperties
).
{ "nvd_published_at": null, "cwe_ids": [ "CWE-79" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2024-09-06T19:51:19Z" }