oss-sec: [OSSA 2016-007] Nova host data leak through resize/migration (CVE-2016-2140)

[Tristan Cacqueray <tdecacqu () redhat com>]

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OSSA-2016-007: Nova host data leak through resize/migration
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:Date: March 08, 2016
:CVE: CVE-2016-2140


Affects
~~~~~~~
- Nova: <=2015.1.3, >=12.0.0 <=12.0.2


Description
~~~~~~~~~~~
Matthew Booth from Red Hat reported a vulnerability in Nova instance
resize/migration. By overwriting an ephemeral or root disk with a
malicious image before requesting a resize, an authenticated user may
be able to read arbitrary files from the compute host. Only setups
using libvirt driver with raw storage and setting "use_cow_images =
False" (not default) are affected.


Patches
~~~~~~~
- https://review.openstack.org/289960 (Kilo)
- https://review.openstack.org/289958 (Liberty)
- https://review.openstack.org/289957 (Mitaka)


Credits
~~~~~~~
- Matthew Booth from Red Hat (CVE-2016-2140)


References
~~~~~~~~~~
- https://bugs.launchpad.net/bugs/1548450
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2140


Notes
~~~~~
- This fix will be included in future 2015.1.3 (kilo) and 12.0.3
  (liberty) releases.

--
Tristan Cacqueray
OpenStack Vulnerability Management Team

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