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krb5 -- ASN.1 decoder denial-of-service vulnerability


An advisory published by the MIT Kerberos team says:

The ASN.1 decoder library in the MIT Kerberos 5 distribution is vulnerable to a denial-of-service attack causing an infinite loop in the decoder. The KDC is vulnerable to this attack.

An unauthenticated remote attacker can cause a KDC or application server to hang inside an infinite loop.

An attacker impersonating a legitimate KDC or application server may cause a client program to hang inside an infinite loop.



portaudit: krb5 -- ASN.1 decoder denial-of-service vulnerability

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If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Officer. Refer to "FreeBSD Security Information" for more information.

Oliver Eikemeier <>