====================================================================

                             CERT-Renater

                 Note d'Information No. 2020/VULN312
_____________________________________________________________________

DATE                : 08/06/2020

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Django versions prior to 3.0.7,
                                          2.2.13.

=====================================================================
https://www.djangoproject.com/weblog/2020/jun/03/security-releases/
_____________________________________________________________________

https://www.djangoproject.com/weblog/2020/jun/03/security-releases/
<https://www.djangoproject.com/weblog/2020/jun/03/security-releases/>

In accordance with `our security release policy
<https://docs.djangoproject.com/en/dev/internals/security/>`_, the
Django team is issuing `Django 3.0.7
<https://docs.djangoproject.com/en/dev/releases/3.0.7/>`_ and `Django
2.2.13
<https://docs.djangoproject.com/en/dev/releases/2.2.13/>`_. These
releases address the security issue detailed below.
We encourage all users of Django to upgrade as soon as possible.


CVE-2020-13254: Potential data leakage via malformed memcached keys
===================================================================

In cases where a memcached backend does not perform key validation,
passing malformed cache keys could result in a key collision, and
potential data leakage. In order to avoid this vulnerability, key
validation is added to the memcached cache backends.

Thank you to Dan Palmer for the report and patch.


CVE-2020-13596: Possible XSS via admin ``ForeignKeyRawIdWidget``
================================================================

Query parameters for the admin ``ForeignKeyRawIdWidget`` were not
properly URL encoded, posing an XSS attack vector.
``ForeignKeyRawIdWidget`` now ensures query parameters are correctly URL
encoded.

Thank you to Jon Dufresne for the report and patch.


Affected supported versions
===========================

* Django master branch
* Django 3.1 (currently at alpha status)
* Django 3.0
* Django 2.2


Resolution
==========

Patches to resolve the issue have been applied to Django's master branch
and the 3.1, 3.0, and 2.2 release branches. The patches may be obtained
from the following changesets:

CVE-2020-13254:

* On the `master branch
<https://github.com/django/django/commit/2c82414914ae6476be5a166be9ff49c24d0d9069>`__
* On the `3.1 release branch
<https://github.com/django/django/commit/580bd64c0482ae9b7c05715390e25f4405a12719>`__
* On the `3.0 release branch
<https://github.com/django/django/commit/84b2da5552e100ae3294f564f6c862fef8d0e693>`__
* On the `2.2 release branch
<https://github.com/django/django/commit/07e59caa02831c4569bbebb9eb773bdd9cb4b206>`__

CVE-2020-13596:

* On the `master branch
<https://github.com/django/django/commit/2dd4d110c159d0c81dff42eaead2c378a0998735>`__
* On the `3.1 release branch
<https://github.com/django/django/commit/49d7cc19e33a104bb23f7ae1dbb1240b4f6c40f9>`__
* On the `3.0 release branch
<https://github.com/django/django/commit/1f2dd37f6fcefdd10ed44cb233b2e62b520afb38>`__
* On the `2.2 release branch
<https://github.com/django/django/commit/6d61860b22875f358fac83d903dc629897934815>`__

The following releases have been issued:

* Django 3.0.7 (`download Django 3.0.7
<https://www.djangoproject.com/m/releases/3.0/Django-3.0.7.tar.gz>`_ |
`3.0.7
checksums <https://www.djangoproject.com/m/pgp/Django-3.0.7.checksum.txt>`_)
* Django 2.2.13 (`download Django 2.2.13
<https://www.djangoproject.com/m/releases/2.2/Django-2.2.13.tar.gz>`_ |
`2.2.13 checksums
<https://www.djangoproject.com/m/pgp/Django-2.2.13.checksum.txt>`_)

The PGP key ID used for these releases is Carlton Gibson: E17DF5C82B4F9D00.


General notes regarding security reporting
==========================================

As always, we ask that potential security issues be reported via
private email to ``security () djangoproject com``, and not via Django's
Trac instance or the django-developers list. Please see `our security
policies <https://www.djangoproject.com/security/>`_ for further
information.



=========================================================
+ CERT-RENATER        | tel : 01-53-94-20-44            +
+ 23/25 Rue Daviel    | fax : 01-53-94-20-41            +
+ 75013 Paris         | email:cert@support.renater.fr   +
=========================================================