CVE-2022-21697 : Vulnerability Insights and Analysis

Jupyter Server Proxy is a Jupyter notebook server extension to proxy web services. A vulnerability (CVE-2022-21697) exists in versions of Jupyter Server Proxy prior to 3.2.1, making them susceptible to Server-Side Request Forgery (SSRF).

Understanding CVE-2022-21697

This vulnerability affects users deploying Jupyter Server or Notebook with the jupyter-proxy-server extension enabled.

What is CVE-2022-21697?

The vulnerability allows authenticated clients to proxy requests to other hosts by bypassing the

allowed_hosts

check, posing a moderate security risk.

The Impact of CVE-2022-21697

With a CVSS v3.1 base score of 6.3 (Medium severity), the vulnerability could result in high confidentiality impact and low integrity impact. The attack vector is through the network, requiring user interaction.

Technical Details of CVE-2022-21697

Vulnerability Description

The SSRF vulnerability in Jupyter Server Proxy allows authenticated clients to proxy requests to unauthorized hosts.

Affected Systems and Versions

Versions of Jupyter Server Proxy prior to 3.2.1 are affected by this vulnerability.

Exploitation Mechanism

The lack of input validation in the affected versions permits authenticated clients to proxy requests to other hosts without undergoing the

allowed_hosts

check.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to upgrade to version 3.2.1 to mitigate the vulnerability. Alternatively, the patch can be manually installed as a temporary workaround.

Long-Term Security Practices

Ensure regular software updates and follow best security practices to prevent SSRF vulnerabilities.

Patching and Updates

Stay informed about security advisories and promptly apply patches to secure your systems.