A Nova regression update has been released for Ubuntu Linux 20.04 LTS.

USN-6073-5: Nova regression

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Ubuntu Security Notice USN-6073-5
May 14, 2023

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

- Ubuntu 20.04 LTS

Summary:

USN-6073-3 introduced a regression in Nova.

Software Description:
- nova: OpenStack Compute cloud infrastructure

Details:

USN-6073-3 fixed a vulnerability in Nova. The update introduced a
regression causing Nova to be unable to detach volumes from instances. This
update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jan Wasilewski and Gorka Eguileor discovered that Nova incorrectly
handled deleted volume attachments. An authenticated user or attacker could
possibly use this issue to gain access to sensitive information.
This update may require configuration changes to be completely effective,
please see the upstream advisory for more information:
https://security.openstack.org/ossa/OSSA-2023-003.html

Update instructions:

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

Ubuntu 20.04 LTS:
python3-nova 2:21.2.4-0ubuntu2.4

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

References:
https://ubuntu.com/security/notices/USN-6073-5
https://ubuntu.com/security/notices/USN-6073-1
https://launchpad.net/bugs/2019460

Package Information:
https://launchpad.net/ubuntu/+source/nova/2:21.2.4-0ubuntu2.4