CLSA-2024-1720178212 krb5: Fix of CVE-2023-36054

CVE-2023-36054: fix uninitialized pointer in kadmrpcxdr.c to prevent kadmind crash...

ALPINE-CVE-2023-36054

lib/kadm5/kadmrpcxdr.c in MIT Kerberos 5 aka krb5 before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because xdrkadm5principalentrec does not validate the relationship between nkeydata and the keydata array...