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[Bug 1396544] Re: Default `target={}` value leaks into subsequent `policy.check()` calls

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Alan Pevec <1396544@xxxxxxxxxxxxxxxxxx>
Date: Fri, 13 Mar 2015 01:00:37 -0000
Reply-to: Bug 1396544 <1396544@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: horizon/icehouse
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1396544

Title:
  Default `target={}` value leaks into subsequent `policy.check()` calls

Status in OpenStack Dashboard (Horizon):
  Fix Released
Status in OpenStack Dashboard (Horizon) icehouse series:
  Fix Released
Status in OpenStack Dashboard (Horizon) juno series:
  Fix Released
Status in OpenStack Security Advisories:
  Won't Fix

Bug description:
  Due to mutable dictionary being used as the default `target` argument
  value the first target calculated from scratch in POLICY_CHECK
  function will be used for all subsequent calls to POLICY_CHECK with 2
  arguments. The wrong `target` can either lead to a reduced set of
  operations on an entity for a given user, or to enlarged one. The
  latter case poses a security breach from an cloud operators' point of
  view.

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