Debian Security Update DSA-4944 krb5 - security update

[LinuxBot]

It was discovered that the Key Distribution Center (KDC) in krb5, the MIT implementation of Kerberos, is prone to a NULL pointer dereference flaw. An unauthenticated attacker can take advantage of this flaw to cause a denial of service (KDC crash) by sending a request containing a PA-ENCRYPTED-CHALLENGE padata element without using FAST.

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