[jira] [Created] (HADOOP-12617) SPNEGO authentication request to non-default realm gets default realm name inserted in target server principal

["Matt Foley (JIRA)" <ji...@apache.org>]

Matt Foley created HADOOP-12617:
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             Summary: SPNEGO authentication request to non-default realm gets default realm name inserted in target server principal
                 Key: HADOOP-12617
                 URL: https://issues.apache.org/jira/browse/HADOOP-12617
             Project: Hadoop Common
          Issue Type: Bug
          Components: security
    Affects Versions: 2.7.1
         Environment: Java client talking to two secure clusters in different Kerberos realms,
or talking to any secure cluster in non-default realm
            Reporter: Matt Foley
            Assignee: Matt Foley


Note: This is NOT a vulnerability.

In order for a single Java client to communicate with two different secure clusters in different realms (only one of which can be the "default_realm"), the client's krb5.conf file must specify both realms, and provide a \[domain_realm\] section that maps cluster servers' domains to the correct realms.  With other appropriate behaviors (such as using the config from each cluster to talk to the respective clusters, and a user principal from each realm to talk to the respective realms), this is sufficient for most Hadoop ecosystem clients.  

But our SPNEGO using clients, such as Oozie, have a bug when it comes to talking to a non-default realm.  The default realm name gets incorrectly inserted into the construction of the target server principal for the non-default-realm cluster.  Details and proposed solution are given in the first comments below.



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