The krb5_ldap_get_password_policy_from_dn function in
plugins/kdb/ldap/libkdb_ldap/ldap_pwd_policy.c in MIT Kerberos 5 (aka
krb5) before 1.13.1, when the KDC uses LDAP, allows remote
authenticated users to cause a denial of service (daemon crash) via a
successful LDAP query with no results, as demonstrated by using an
incorrect object type for a password policy.
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