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Consensus already seems to have been reached that this is not a
vulnerability, so I'm going to open it publicly as a hardening
opportunity.

** Description changed:

- This issue is being treated as a potential security risk under embargo.
- Please do not make any public mention of embargoed (private) security
- vulnerabilities before their coordinated publication by the OpenStack
- Vulnerability Management Team in the form of an official OpenStack
- Security Advisory. This includes discussion of the bug or associated
- fixes in public forums such as mailing lists, code review systems and
- bug trackers. Please also avoid private disclosure to other individuals
- not already approved for access to this information, and provide this
- same reminder to those who are made aware of the issue prior to
- publication. All discussion should remain confined to this private bug
- report, and any proposed fixes should be added to the bug as
- attachments.
- 
  During working on bug #1686616, I realized that using the privileged user to find the host for an instance works for any other projects, even if the requesting user doesn't have rights to see other projects' instances.
  I guess it is not a big impact, one has to know an UUID of a foreign instance, and the maximum effect is to put a volume on the host where the instance resides (if it has a cinder-volume running).
  I think after the filter gets the server info via the privileged user, it must check if it has rights to access that info. If a privileged user is not configured, there's no problem.

** Information type changed from Private Security to Public

** Tags added: security

** Changed in: ossa
       Status: Incomplete => Won't Fix

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https://bugs.launchpad.net/bugs/1687018

Title:
  One can request to put a volume next to any tenant's instance via
  InstanceLocalityFilter

Status in Cinder:
  New
Status in OpenStack Security Advisory:
  Won't Fix

Bug description:
  During working on bug #1686616, I realized that using the privileged user to find the host for an instance works for any other projects, even if the requesting user doesn't have rights to see other projects' instances.
  I guess it is not a big impact, one has to know an UUID of a foreign instance, and the maximum effect is to put a volume on the host where the instance resides (if it has a cinder-volume running).
  I think after the filter gets the server info via the privileged user, it must check if it has rights to access that info. If a privileged user is not configured, there's no problem.

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