RHSA-2015:1894 - Security Advisory

Topic

Updated python-django packages that fix two security issues are now
available for Red Hat Enterprise Linux OpenStack Platform 6.0.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Description

Django is a high-level Python Web framework that encourages rapid
development and a clean, pragmatic design. It focuses on automating as much
as possible and adhering to the DRY (Don't Repeat Yourself) principle.

It was found that Django incorrectly handled the session store. A session
could be created by anonymously accessing the
django.contrib.auth.views.logout view if it was not decorated correctly
with django.contrib.auth.decorators.login_required. A remote attacker could
use this flaw to fill up the session store or cause other users' session
records to be evicted by requesting a large number of new sessions.
(CVE-2015-5963)

It was found that certain Django functions would, in certain circumstances,
create empty sessions. A remote attacker could use this flaw to fill up the
session store or cause other users' session records to be evicted by
requesting a large number of new sessions. (CVE-2015-5964)

Red Hat would like to thank the upstream Django project for reporting these
issues. Upstream acknowledges Lin Hua Cheng as the original reporter of
CVE-2015-5964.

All python-django users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Affected Products

• Red Hat OpenStack 6.0 x86_64

Fixes

• BZ - 1252890 - CVE-2015-5963 python-django: Denial-of-service possibility in logout() view by filling session store
• BZ - 1252891 - CVE-2015-5964 python-django: Denial-of-service possibility in logout() view by filling session store

CVEs

• CVE-2015-5963
• CVE-2015-5964

References

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