oss-security - [OSSA 2016-011] Nova may fail to delete images in resize state regression (CVE-2016-7498)

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Message-ID: <cb66c7f5-a882-5553-8657-a0bafdf14b2a@redhat.com>
Date: Fri, 23 Sep 2016 01:08:17 +0000
From: Tristan Cacqueray <tdecacqu@...hat.com>
To: oss-security@...ts.openwall.com
Subject: [OSSA 2016-011] Nova may fail to delete images in resize state
 regression (CVE-2016-7498)

========================================================================
OSSA-2016-011: Nova may fail to delete images in resize state regression
========================================================================

:Date: September 21, 2016
:CVE: CVE-2016-7498


Affects
~~~~~~~
- Nova: ==13.0.0


Description
~~~~~~~~~~~
Rajesh Tailor from Red Hat reported a vulnerability in Nova. If an
authenticated user deletes an instance while it is in resize state, it
will cause the original instance to not be deleted from the compute
node it was running on. An attacker can use this to launch a denial of
service attack. All Nova setups are affected.


Patches
~~~~~~~
- https://review.openstack.org/327398 (Mitaka)
- https://review.openstack.org/326262 (Newton)


Credits
~~~~~~~
- Rajesh Tailor from Red Hat (CVE-2016-7498)


References
~~~~~~~~~~
- https://bugs.launchpad.net/bugs/1589821
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7498


Notes
~~~~~
- This bug is similar to OSSA-2015-017 (CVE-2015-3280) and was
  re-introduced in the first release of Mitaka version of Nova and it
  was re-fixed in nova-13.1.0.

--
Tristan Cacqueray
OpenStack Vulnerability Management Team



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