An OpenStack Keystone security update has been released for Ubuntu Linux 19.10.

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Ubuntu Security Notice USN-4262-1
January 30, 2020

keystone vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10

Summary:

OpenStack Keystone could be made to expose sensitive information over the
network.

Software Description:
- keystone: OpenStack identity service

Details:

Daniel Preussker discovered that OpenStack Keystone incorrectly handled the
list credentials API. A user with a role on the project could use this
issue to view any other user's credentials.

Update instructions:

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

Ubuntu 19.10:
keystone 2:16.0.0-0ubuntu1.1
python3-keystone 2:16.0.0-0ubuntu1.1

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

References:
https://usn.ubuntu.com/4262-1
CVE-2019-19687

Package Information:
https://launchpad.net/ubuntu/+source/keystone/2:16.0.0-0ubuntu1.1