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CVE-2024-3596 — RADIUS Protocol under RFC2865 is vulnerable to forgery attacks.

2026-10-03T14:59:10.110287+00:00

Affected: IETF RFC, Siemens CPC80 Central Processing/Communication, Siemens CPCI85 Central Processing/Communication, Siemens POWER METER SICAM Q100 family, Siemens POWER METER SICAM Q200 family, Siemens Powerlink IP, Siemens RUGGEDCOM APE1808, Siemens RUGGEDCOM CROSSBOW, Siemens RUGGEDCOM i800, Siemens RUGGEDCOM i800NC and 467 more

RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid Response (Access-Accept, Access-Reject, or Access-Challenge) to any other response using a chosen-prefix collision attack against MD5 Response Authenticator signature.

USN-7055-1 — freeradius vulnerability

2026-10-03T14:59:10.111150+00:00

Affected: Ubuntu:20.04:LTS: freeradius, Ubuntu:22.04:LTS: freeradius, Ubuntu:24.04:LTS: freeradius

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 "limit_proxy_state" and "require_message_authenticator" that default to "auto" but should be set to "yes" once all RADIUS devices have been upgraded on a network.