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.