A Flask security update has been released for Ubuntu Linux 20.04 LTS, 22.04 LTS, 22.10, and 23.04.

[USN-6111-1] Flask vulnerability

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Ubuntu Security Notice USN-6111-1
May 29, 2023

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

- Ubuntu 23.04
- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Flask could be made to expose sensitive information in certain scenarios.

Software Description:
- flask: Micro web framework based on Werkzeug and Jinja2

Details:

It was discovered that Flask incorrectly handled certain data responses.
An attacker could possibly use this issue to expose sensitive information.

Update instructions:

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

Ubuntu 23.04:
python3-flask 2.2.2-2ubuntu1.1

Ubuntu 22.10:
python3-flask 2.0.3-1ubuntu1.1

Ubuntu 22.04 LTS:
python3-flask 2.0.1-2ubuntu1.1

Ubuntu 20.04 LTS:
python3-flask 1.1.1-2ubuntu0.1

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

References:
https://ubuntu.com/security/notices/USN-6111-1
CVE-2023-30861

Package Information:
https://launchpad.net/ubuntu/+source/flask/2.2.2-2ubuntu1.1
https://launchpad.net/ubuntu/+source/flask/2.0.3-1ubuntu1.1
https://launchpad.net/ubuntu/+source/flask/2.0.1-2ubuntu1.1
https://launchpad.net/ubuntu/+source/flask/1.1.1-2ubuntu0.1