RHSA-2023:3440 - Security Advisory

Topic

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.

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.

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

Affected Products

• Red Hat OpenStack 17 x86_64

Fixes

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

CVEs

• CVE-2023-30861

References

• https://access.redhat.com/security/updates/classification/#important