Ubuntu Security Update USN-7257-1: Kerberos vulnerability

[LinuxBot]

Goldberg, Miro Haller, Nadia Heninger, Mike Milano, Dan Shumow, Marc Stevens, and Adam Suhl discovered that Kerberos 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 support for the Message-Authenticator attribute in non-EAP authentication methods for communications between Kerberos and a RADIUS server.

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