Goldberg, Miro Haller, Nadia Heninger, Mike Milano, Dan Shumow, Marc Stevens, and Adam Suhl discovered that FreeRADIUS incorrectly authenticated certain responses. An attacker able to intercept communications between a RADIUS client and server could possibly use this issue to forge responses, bypass authentication, and access network devices and services.
This update introduces new configuration options called "limitproxystate" and "requiremessageauthenticator" that default to "auto" but should be set to "yes" once all RADIUS devices have been upgraded on a network.
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