Open Stack

Fix proposed to branch: master
Review: https://review.openstack.org/43322

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https://bugs.launchpad.net/bugs/1175905

Title:
  passlib failure to sanitize env variables PASSLIB_MAX_PASSWORD_SIZE

Status in OpenStack Identity (Keystone):
  In Progress

Bug description:
  Grant Murphy originally reported:

  * Usage of passlib

    The keystone server does not appear to sanitize the environment when 
    starting. This means that an unintended value can be set for 
    PASSLIB_MAX_PASSWORD_SIZE. Which will overwrite the default value of 
    4096 and potentially cause an unhandled passlib.exc.PasswordSizeError.  
    We should ensure sensible defaults are applied here prior to loading passlib.

  If this is exploitable it will need a CVE, if not we should still
  harden it so it can't be monkeyed with in the future.

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