# CVE-2022-29241: jupyter-server: Jupyter Server provides the backend (i.e

CVE-2022-29241 is fixed in jupyter-server on 1 platform, first by DEBIAN-CVE-2022-29241, released June 14, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-29241
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0099
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 14, 2022

## Description

Jupyter Server provides the backend (i.e. the core services, APIs, and REST endpoints) for Jupyter web applications like Jupyter Notebook. Prior to version 1.17.1, if notebook server is started with a value of `root_dir` that contains the starting user's home directory, then the underlying REST API can be used to leak the access token assigned at start time by guessing/brute forcing the PID of the jupyter server. While this requires an authenticated user session, this URL can be used from a cross-site scripting payload or from a hooked or otherwise compromised browser to leak this access token to a malicious third party. This token can be used along with the REST API to interact with Jupyter services/notebooks such as modifying or overwriting critical files, such as .bashrc or .ssh/authorized_keys, allowing a malicious user to read potentially sensitive data and possibly gain control of the impacted system. This issue is patched in version 1.17.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | jupyter-server Debian 12.15 (bookworm) | 1.17.1-1 | [DEBIAN-CVE-2022-29241](https://patchblox.com/security/data/fix/linux/debian-cve-2022-29241.md) | Jun 14, 2022 |
| Linux | jupyter-server Debian 13.5 (trixie) | 1.17.1-1 | [DEBIAN-CVE-2022-29241](https://patchblox.com/security/data/fix/linux/debian-cve-2022-29241.md) | Jun 14, 2022 |
| Linux | jupyter-server Debian 14 | 1.17.1-1 | [DEBIAN-CVE-2022-29241](https://patchblox.com/security/data/fix/linux/debian-cve-2022-29241.md) | Jun 14, 2022 |

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