[jira] [Created] (COUCHDB-2325) fabric:get_security/2 can return security objects from nodes that are in maintenance mode

["Mike Wallace (JIRA)" <ji...@apache.org>]

Mike Wallace created COUCHDB-2325:
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             Summary: fabric:get_security/2 can return security objects from nodes that are in maintenance mode
                 Key: COUCHDB-2325
                 URL: https://issues.apache.org/jira/browse/COUCHDB-2325
             Project: CouchDB
          Issue Type: Bug
      Security Level: public (Regular issues)
          Components: BigCouch
            Reporter: Mike Wallace


Currently, fabric:get_security/2 calls fabric_util:get_db/2 and if the node servicing a request does not have a shard for the db then fabric_util:get_db/2 can return a shard from a node which is in maintenance mode.

If that node is a replacement node that has not yet been brought into the cluster then the security object will be empty. Because fabric:get_security/2 is in the code path for authorizing requests at the HTTP layer this can result in live nodes returning 403s. I have verified that this issue exists even though cassim now handles authorization (cassim eventually makes the same call to fabric:get_security/2).

The crux of the problem is that the algorithm used by fabric_util:get_db/2 doesn't account for the possibility of nodes being in maintenance mode.

See https://gist.github.com/mikewallace1979/8d01bb8661a50762bfc3 for the steps to reproduce locally.



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