[Bug 1664931] Related fix proposed to ossa (master)

[OpenStack Infra]

Related fix proposed to branch: master
Review: https://review.openstack.org/519686

-- 
You received this bug notification because you are a member of Ubuntu
OpenStack, which is subscribed to nova in Ubuntu.
https://bugs.launchpad.net/bugs/1664931

Title:
  [OSSA-2017-005] nova rebuild ignores all image properties and
  scheduler filters (CVE-2017-16239)

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) newton series:
  In Progress
Status in OpenStack Compute (nova) ocata series:
  In Progress
Status in OpenStack Compute (nova) pike series:
  In Progress
Status in OpenStack Security Advisory:
  Fix Committed
Status in nova package in Ubuntu:
  New

Bug description:
  Big picture: If some image has some restriction on aggregates or hosts
  it can be run on, tenant may use  nova rebuild command to circumvent
  those restrictions. Main issue is with ImagePropertiesFilter, but it
  may cause issues with combination of flavor/image (for example allows
  to run license restricted OS (Windows) on host which has no such
  license, or rebuild instance with cheap flavor with image which is
  restricted only for high-priced flavors).

  I don't know if this is a security bug or not, if you would find it
  non-security issue, please remove the security flag.

  Steps to reproduce:

  1. Set up nova with  ImagePropertiesFilter or IsolatedHostsFilter active. They should allows to run 'image1' only on 'host1', but never on 'host2'.
  2. Boot instance with some other (non-restricted) image on 'host2'.
  3. Use nova rebuild INSTANCE image1

  Expected result:

  nova rejects rebuild because given image ('image1') may not run on
  'host2'.

  Actual result:

  nova happily rebuild instance with image1 on host2, violating
  restrictions.

  Checked affected version: mitaka.

  I believe, due to the way 'rebuild' command is working, newton and
  master are affected too.

To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1664931/+subscriptions