vantage6 up to 4.1.x SSH Service access control

Summaryinfo

A vulnerability, which was classified as critical, has been found in vantage6 up to 4.1.x. Affected by this issue is some unknown functionality of the component SSH Service. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2024-21653. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in vantage6 up to 4.1.x. This issue affects an unknown functionality of the component SSH Service. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC). Nodes and servers get a ssh config by default that permits root login with password authentication. In a proper deployment, the SSH service is not exposed so there is no risk, but not all deployments are ideal. The default should therefore be less permissive. The vulnerability can be mitigated by removing the ssh part from the docker file and rebuilding the docker image. Version 4.2.0 patches the vulnerability.

The weakness was disclosed 01/30/2024 as GHSA-2wgc-48g2-cj5w. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2024-21653 since 12/29/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 4.2.0 eliminates this vulnerability. Applying the patch 3fcc6e6a8bd1142fd7a558d8fdd2b246e55c8841 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• vantage6

Version

• 4.0
• 4.1

License

• open-source

Website

• Product: https://github.com/vantage6/vantage6/

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