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Posted to hdfs-issues@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2016/10/25 20:31:58 UTC

[jira] [Created] (HDFS-11053) Unnecessary superuser check in versionRequest()

Kihwal Lee created HDFS-11053:
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             Summary: Unnecessary superuser check in versionRequest()
                 Key: HDFS-11053
                 URL: https://issues.apache.org/jira/browse/HDFS-11053
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Kihwal Lee


The {{versionRequest()}} call does not return any sensitive information.  It is mainly used for sanity checks.   The presence of {{checkSuperuserPrivilege()}} forces users to run datanode as a hdfs superuser.

In secure setup, a keytab obtained from a compromised datanode can allow the intruder to gain hdfs superuser privilege.  We should allow datanodes to be run as non-hdfs-superuser by removing {{checkSuperuserPrivilege()}} from {{versionRequest()}}.



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