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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: Red Hat OpenStack Platform 17.0 (python-flask) security update
Advisory ID:       RHSA-2023:3440-01
Product:           Red Hat OpenStack Platform
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:3440
Issue date:        2023-06-05
CVE Names:         CVE-2023-30861 
=====================================================================

1. Summary:

An update for python-flask is now available for Red Hat OpenStack Platform
17.0 (Wallaby).

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat OpenStack Platform 17.0 - noarch

3. Description:

Flask is called a “micro-framework” because the idea to keep the core
simple but extensible. There is no database abstraction layer, no form
validation or anything else where different libraries already exist that
can handle that. However Flask knows the concept of extensions that can add
this functionality into your application as if it was implemented in Flask
itself. There are currently extensions for object relational mappers, form
validation, upload handling, various open authentication technologies and
more.

Security Fix(es):

* Possible disclosure of permanent session cookie due to missing Vary:
Cookie header (CVE-2023-30861)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page listed in the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

2196643 - CVE-2023-30861 flask: Possible disclosure of permanent session cookie due to missing Vary: Cookie header

6. Package List:

Red Hat OpenStack Platform 17.0:

Source:
python-flask-1.1.2-6.el9ost.src.rpm

noarch:
python3-flask-1.1.2-6.el9ost.noarch.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2023-30861
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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