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[USN-1831-2] OpenStack Nova regression

Posted on 29 May 2013
Ubuntu Security

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Ubuntu Security Notice USN-1831-2
May 29, 2013

nova regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10

Summary:

USN-1831-1 introduced a regression in OpenStack Nova.

Software Description:
- nova: OpenStack Compute cloud infrastructure

Details:

USN-1831-1 fixed a vulnerability in OpenStack Nova. The upstream fix
introduced a regression where instances using uncached QCOW2 images would=

fail to start. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Loganathan Parthipan discovered that Nova did not verify the size of QCO=
W2
instance storage. An authenticated attacker could exploit this to cause =
a
denial of service by creating an image with a large virtual size with
little data, then filling the virtual disk.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.10:
python-nova 2012.2.3-0ubuntu2.2

In general, a standard system update will make all the necessary changes.=


References:
http://www.ubuntu.com/usn/usn-1831-2
http://www.ubuntu.com/usn/usn-1831-1
https://launchpad.net/bugs/1183606

Package Information:
https://launchpad.net/ubuntu/+source/nova/2012.2.3-0ubuntu2.2





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