Ubuntu alert USN-1831-2 (nova)

From:
    	     
 
Jamie Strandboge <jamie@canonical.com> 
To:
    	     
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	     
 
[USN-1831-2] OpenStack Nova regression 
Date:
    	     
 
Tue, 28 May 2013 22:26:57 -0500
Message-ID:
    	     
 
<51A57581.2000604@canonical.com>
Archive-link:
    	     
 
Article, Thread
              

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

nova regression
==========================================================================

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 QCOW2
 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/2012.2.3-0ubunt...




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