mirror of
https://github.com/django/django.git
synced 2024-12-01 15:42:04 +01:00
77 lines
3.6 KiB
Plaintext
77 lines
3.6 KiB
Plaintext
==========================
|
|
Django 2.2.4 release notes
|
|
==========================
|
|
|
|
*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
|
|
``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 null characters (``'\x00'``) (:ticket:`30506`).
|
|
|
|
* Fixed a regression in Django 2.2 where auto-reloader crashes if a translation
|
|
directory cannot be resolved (:ticket:`30647`).
|