[jira] [Resolved] (HADOOP-18573) Improve error reporting on non-standard kerberos names

["Steve Loughran (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-18573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran resolved HADOOP-18573.
-------------------------------------
    Fix Version/s: 3.4.0
                   3.3.5
       Resolution: Fixed

> Improve error reporting on non-standard kerberos names
> ------------------------------------------------------
>
>                 Key: HADOOP-18573
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18573
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 3.3.4
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 3.4.0, 3.3.5
>
>
> The kerberos RFC does not declare any restriction on
> characters used in kerberos names, though
> implementations MAY be more restrictive.
> If the kerberos controller supports use non-conventional
> user names *and the kerberos admin chooses to use them*
> this can confuse some of the parsing.
> The obvious solution is for the enterprise admins to "not do that"
> as a lot of things break, bits of hadoop included.
> Harden the hadoop code slightly so at least we fail more gracefully,
> so people can then get in touch with their sysadmin and tell them
> to stop it.
> Note: given the kerberos admin is implicitly a superuser, being
> able to create malformed principal names.
> doesn't give them any privileges, just offers a different way
> to stop the cluster working.



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