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Date: Tue, 25 Aug 2015 16:49:44 +0000
From: Tristan Cacqueray <tdecacqu@...hat.com>
To: oss-security@...ts.openwall.com
Subject: [OSSA 2015-015] Nova instance migration process does not stop when
 instance is deleted (CVE-2015-3241)

=====================================================================================
OSSA-2015-015: Nova instance migration process does not stop when instance is deleted
=====================================================================================

:Date: August 25, 2015
:CVE: CVE-2015-3241


Affects
~~~~~~~
- Nova: versions through 2014.2.3 and 2015.1 versions through 2015.1.1


Description
~~~~~~~~~~~
George Shuklin from Webzilla LTD reported a vulnerability in Nova
migration process. By resizing and deleting an instance repeatedly an
authenticated user may overcome his quota and overload Nova computes
node resulting in a denial of service attack. All Nova setups are
affected.


Patches
~~~~~~~
- https://review.openstack.org/208876 (Juno)
- https://review.openstack.org/214528 (Juno)
- https://review.openstack.org/213234 (Kilo)
- https://review.openstack.org/209856 (Kilo)
- https://review.openstack.org/194861 (Liberty)
- https://review.openstack.org/192986 (Liberty)


Credits
~~~~~~~
- George Shuklin from Webzilla LTD (CVE-2015-3241)


References
~~~~~~~~~~
- https://launchpad.net/bugs/1387543
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3241


Notes
~~~~~
- This fix requires oslo.concurrency >= 1.8.2 for Kilo and >= 2.3.0 for
  Liberty. Juno fix embeds a patched version of oslo.concurrency.
- This fix will be included in future 2014.2.4 (juno) and 2015.1.2 (kilo)
  releases.

--
Tristan Cacqueray
OpenStack Vulnerability Management Team


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