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From "Sushanth Sowmyan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-5989) Hive metastore authorization check is not threadsafe
Date Mon, 09 Dec 2013 22:48:08 GMT

     [ https://issues.apache.org/jira/browse/HIVE-5989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sushanth Sowmyan updated HIVE-5989:
-----------------------------------

    Status: Patch Available  (was: Open)

> Hive metastore authorization check is not threadsafe
> ----------------------------------------------------
>
>                 Key: HIVE-5989
>                 URL: https://issues.apache.org/jira/browse/HIVE-5989
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore, Security
>    Affects Versions: 0.11.0
>            Reporter: Sushanth Sowmyan
>            Assignee: Sushanth Sowmyan
>            Priority: Critical
>         Attachments: HIVE-5989.patch, SleepyAP.patch
>
>
> Metastore-side authorization has a couple of pretty important threadsafety bugs in it:
> a) The HiveMetastoreAuthenticated instantiated by the AuthorizationPreEventListener is
static. This is a premature optimization and incorrect, as it will result in Authenticator
implementations that store state potentially giving an incorrect result, and this bug very
much exists with the DefaultMetastoreAuthenticator.
> b) It assumes HMSHandler.getHiveConf() is itself going to be thread-safe, which it is
not. HMSHandler.getConf() is the appropriate thread-safe equivalent.
> The effect of this bug is that if there are two users that are concurrently running jobs
on the metastore, we might :
> a) Allow a user to do something they didn't have permission to, because the other person
did. (Security hole)
> b) Disallow a user from doing something they should have permission to (More common -
annoying and can cause job failures)



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