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From "Brent N Atkinson (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (CONTINUUM-2761) Users with limited group visibility cause expensive queries when running build reports
Date Mon, 04 May 2015 01:46:05 GMT

     [ https://issues.apache.org/jira/browse/CONTINUUM-2761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brent N Atkinson closed CONTINUUM-2761.
---------------------------------------
    Resolution: Fixed

Fixed in r1677509

> Users with limited group visibility cause expensive queries when running build reports
> --------------------------------------------------------------------------------------
>
>                 Key: CONTINUUM-2761
>                 URL: https://issues.apache.org/jira/browse/CONTINUUM-2761
>             Project: Continuum
>          Issue Type: Bug
>            Reporter: Brent N Atkinson
>            Assignee: Brent N Atkinson
>             Fix For: 1.5.0
>
>
> As a user with limited group visibility, when running a report for ALL groups the entire
result set is queried. The results are subsequently loaded into memory and are filtered based
on their permissions. This allows the user to initiate much more expensive queries that can
have a significantly negative effect on service health.
> An example: 
> The guest user is granted permission to see only the Default Group, which is empty, on
a server with an extremely large number of build results in other groups. An anonymous user
visits the server and runs an open build report (ALL groups, ALL statuses).
> What you would expect: The anonymous user finds exactly what is visible to them by browsing
the project group: there are no results. Because there are no results, the query is answered
quickly.
> What actually happens: the entire build result table is scanned resulting in an extremely
long query (due to the large number of build results). Also, prior to the work on CONTINUUM-2746,
which uses range queries to load results in batches, this would crash the system with an {{OutOfMemoryError}}.

> The essence of the issue is that users can cause an effect that is disproportional to
their privilege. Ideally, users should only be able to affect the system by accessing resources
they actually have permission to see (scanning only rows they have access to).



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