Update django to 2.2.5

[pyup-bot]

This PR updates django from 2.2.2 to 2.2.5.

Changelog

2.2.5

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

*September 2, 2019*

Django 2.2.5 fixes several bugs in 2.2.4.

Bugfixes
========

* Relaxed the system check added in Django 2.2 for models to reallow use of the
same ``db_table`` by multiple models when database routers are installed
(:ticket:`30673`).

* Fixed crash of ``KeyTransform()`` for
:class:`~django.contrib.postgres.fields.JSONField` and
:class:`~django.contrib.postgres.fields.HStoreField` when using on
expressions with params (:ticket:`30672`).

* Fixed a regression in Django 2.2 where
:attr:`ModelAdmin.list_filter <django.contrib.admin.ModelAdmin.list_filter>`
choices to foreign objects don't respect a model's ``Meta.ordering``
(:ticket:`30449`).


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

2.2.4

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

*August 1, 2019*

Django 2.2.4 fixes security issues and several bugs in 2.2.3.

CVE-2019-14232: Denial-of-service possibility in ``django.utils.text.Truncator``
================================================================================

If ``django.utils.text.Truncator``'s ``chars()`` and ``words()`` methods
were passed the ``html=True`` argument, they were extremely slow to evaluate
certain inputs due to a catastrophic backtracking vulnerability in a regular
expression. The ``chars()`` and ``words()`` methods are used to implement the
:tfilter:`truncatechars_html` and :tfilter:`truncatewords_html` template
filters, which were thus vulnerable.

The regular expressions used by ``Truncator`` have been simplified in order to
avoid potential backtracking issues. As a consequence, trailing punctuation may
now at times be included in the truncated output.

CVE-2019-14233: Denial-of-service possibility in ``strip_tags()``
=================================================================

Due to the behavior of the underlying ``HTMLParser``,
:func:`django.utils.html.strip_tags` would be extremely slow to evaluate
certain inputs containing large sequences of nested incomplete HTML entities.
The ``strip_tags()`` method is used to implement the corresponding
:tfilter:`striptags` template filter, which was thus also vulnerable.

``strip_tags()`` now avoids recursive calls to ``HTMLParser`` when progress
removing tags, but necessarily incomplete HTML entities, stops being made.

Remember that absolutely NO guarantee is provided about the results of
``strip_tags()`` being HTML safe. So NEVER mark safe the result of a
``strip_tags()`` call without escaping it first, for example with
:func:`django.utils.html.escape`.

CVE-2019-14234: SQL injection possibility in key and index lookups for ``JSONField``/``HStoreField``
====================================================================================================

:lookup:`Key and index lookups <jsonfield.key>` for
:class:`~django.contrib.postgres.fields.JSONField` and :lookup:`key lookups
<hstorefield.key>` for :class:`~django.contrib.postgres.fields.HStoreField`
were subject to SQL injection, using a suitably crafted dictionary, with
dictionary expansion, as the ``**kwargs`` passed to ``QuerySet.filter()``.

CVE-2019-14235: Potential memory exhaustion in ``django.utils.encoding.uri_to_iri()``
=====================================================================================

If passed certain inputs, :func:`django.utils.encoding.uri_to_iri` could lead
to significant memory usage due to excessive recursion when re-percent-encoding
invalid UTF-8 octet sequences.

``uri_to_iri()`` now avoids recursion when re-percent-encoding invalid UTF-8
octet sequences.

Bugfixes
========

* Fixed a regression in Django 2.2 when ordering a ``QuerySet.union()``,
``intersection()``, or ``difference()`` by a field type present more than
once results in the wrong ordering being used (:ticket:`30628`).

* Fixed a migration crash on PostgreSQL when adding a check constraint
with a ``contains`` lookup on
:class:`~django.contrib.postgres.fields.DateRangeField` or
:class:`~django.contrib.postgres.fields.DateTimeRangeField`, if the right
hand side of an expression is the same type (:ticket:`30621`).

* Fixed a regression in Django 2.2 where auto-reloader crashes if a file path
contains nulls characters (``'\x00'``) (:ticket:`30506`).

* Fixed a regression in Django 2.2 where auto-reloader crashes if a translation
directory cannot be resolved (:ticket:`30647`).


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

2.2.3

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

*July 1, 2019*

Django 2.2.3 fixes a security issue and several bugs in 2.2.2. Also, the latest
string translations from Transifex are incorporated.

CVE-2019-12781: Incorrect HTTP detection with reverse-proxy connecting via HTTPS
--------------------------------------------------------------------------------

When deployed behind a reverse-proxy connecting to Django via HTTPS,
:attr:`django.http.HttpRequest.scheme` would incorrectly detect client
requests made via HTTP as using HTTPS. This entails incorrect results for
:meth:`~django.http.HttpRequest.is_secure`, and
:meth:`~django.http.HttpRequest.build_absolute_uri`, and that HTTP
requests would not be redirected to HTTPS in accordance with
:setting:`SECURE_SSL_REDIRECT`.

``HttpRequest.scheme`` now respects :setting:`SECURE_PROXY_SSL_HEADER`, if it is
configured, and the appropriate header is set on the request, for both HTTP and
HTTPS requests.

If you deploy Django behind a reverse-proxy that forwards HTTP requests, and
that connects to Django via HTTPS, be sure to verify that your application
correctly handles code paths relying on ``scheme``, ``is_secure()``,
``build_absolute_uri()``, and ``SECURE_SSL_REDIRECT``.

Bugfixes
========

* Fixed a regression in Django 2.2 where :class:`~django.db.models.Avg`,
:class:`~django.db.models.StdDev`, and :class:`~django.db.models.Variance`
crash with ``filter`` argument (:ticket:`30542`).

* Fixed a regression in Django 2.2.2 where auto-reloader crashes with
``AttributeError``, e.g. when using ``ipdb`` (:ticket:`30588`).


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

Links

• PyPI: https://pypi.org/project/django
• Changelog: https://pyup.io/changelogs/django/
• Homepage: https://www.djangoproject.com/

[coveralls]

Pull Request Test Coverage Report for Build 1192

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 99.275%

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Totals
Change from base Build 1157:	0.0%
Covered Lines:	2191
Relevant Lines:	2207

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💛 - Coveralls