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[USN-7857-1] OpenStack Keystone vulnerability

Posted on 04 November 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7857-1
November 04, 2025

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

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS

Summary:

OpenStack Keystone could allow unintended access to network services.

Software Description:
- keystone: OpenStack identity service

Details:

Kay discovered that OpenStack Keystone incorrectly handled the ec2tokens
and s3tokens APIs. A remote attacker could possibly use this issue to
obtain unauthorized access and escalate privileges.

Update instructions:

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

Ubuntu 25.10
keystone 2:28.0.0-0ubuntu1.1
python3-keystone 2:28.0.0-0ubuntu1.1

Ubuntu 25.04
keystone 2:27.0.0-0ubuntu1.1
python3-keystone 2:27.0.0-0ubuntu1.1

Ubuntu 24.04 LTS
keystone 2:25.0.0-0ubuntu1.1
python3-keystone 2:25.0.0-0ubuntu1.1

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

References:
https://ubuntu.com/security/notices/USN-7857-1
https://launchpad.net/bugs/2130629

Package Information:
https://launchpad.net/ubuntu/+source/keystone/2:28.0.0-0ubuntu1.1
https://launchpad.net/ubuntu/+source/keystone/2:27.0.0-0ubuntu1.1
https://launchpad.net/ubuntu/+source/keystone/2:25.0.0-0ubuntu1.1

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