CVE-2025-23390Fleet doesn’t validate a server’s certificate when connecting through SSH

Beschreibung

A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the `known_hosts` file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet. In case the server that is being connected to has a trusted entry in the known_hosts file, then Fleet will correctly check the authenticity of the presented certificate.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390
• https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8