Description (CNA)
Jupyter Server is the backend for Jupyter web applications. In versions 2.17.0 and earlier, a path traversal vulnerability in the REST API allows an authenticated user to escape the configured root_dir and access sibling directories whose names begin with the same prefix as the root_dir. For example, with a root_dir named "test", the API permits access to a sibling directory named "testtest" through a crafted request to the /api/contents endpoint using encoded path components. An attacker can read, write, and delete files in affected sibling directories. Multi-tenant deployments using predictable naming schemes are particularly at risk, as a user with a directory named "user1" could access directories for user10 through user19 and beyond. A user who can choose a single-character folder name could gain access to a significant number of sibling directories. Version 2.18.0 contains a fix. As a workaround, ensure folder names do not share a common prefix with any sibling directory.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| jupyter-server / jupyter_server | affected < 2.18.0 |
CWE
CWE-22
References
ADP enrichment
No English description supplied.
A flaw was found in Jupyter Server. An authenticated user can exploit a path traversal vulnerability in the REST API to escape the configured root directory (`root_dir`). By crafting a request to the `/api/contents` endpoint with encoded path components, an attacker can gain access to sibling directories whose names begin with the same prefix as the `root_dir`. This allows the attacker to read, write, and delete files in these accessible sibling directories, potentially leading to unauthorized data access and modification, especially in multi-tenant environments.