==========================================================================
Ubuntu Security Notice USN-6792-1
May 28, 2024

flask-security vulnerability
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Flask-Security could be made to bypass URL validation and redirect to 
arbitary URL.

Software Description:
- flask-security: Simple security for Flask apps (Python 3)

Details:

Naom Moshe discovered that Flask-Security incorrectly validated URLs. An 
attacker could use this issue to redirect users to arbitrary URLs.



Update instructions:

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

Ubuntu 22.04 LTS
   python3-flask-security          4.0.0-1ubuntu0.1

Ubuntu 20.04 LTS
   python3-flask-security          1.7.5-2ubuntu0.20.04.1

Ubuntu 18.04 LTS
   python3-flask-security          1.7.5-2ubuntu0.18.04.1~esm1
                                   Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-6792-1 
<https://ubuntu.com/security/notices/USN-6792-1>
   CVE-2021-23385

Package Information:
https://launchpad.net/ubuntu/+source/flask-security/4.0.0-1ubuntu0.1 
<https://launchpad.net/ubuntu/+source/flask-security/4.0.0-1ubuntu0.1>
https://launchpad.net/ubuntu/+source/flask-security/1.7.5-2ubuntu0.20.04.1 
<https://launchpad.net/ubuntu/+source/flask-security/1.7.5-2ubuntu0.20.04.1>