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django/docs/releases/3.2.4.txt
Mariusz Felisiak e1d787f1b3 Fixed CVE-2021-33571 -- Prevented leading zeros in IPv4 addresses.
validate_ipv4_address() was affected only on Python < 3.9.5, see [1].
URLValidator() uses a regular expressions and it was affected on all
Python versions.

[1] https://bugs.python.org/issue36384
2021-06-02 10:58:39 +02:00

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==========================
Django 3.2.4 release notes
==========================
*June 2, 2021*
Django 3.2.4 fixes two security issues and several bugs in 3.2.3.
CVE-2021-33203: Potential directory traversal via ``admindocs``
===============================================================
Staff members could use the :mod:`~django.contrib.admindocs`
``TemplateDetailView`` view to check the existence of arbitrary files.
Additionally, if (and only if) the default admindocs templates have been
customized by the developers to also expose the file contents, then not only
the existence but also the file contents would have been exposed.
As a mitigation, path sanitation is now applied and only files within the
template root directories can be loaded.
CVE-2021-33571: Possible indeterminate SSRF, RFI, and LFI attacks since validators accepted leading zeros in IPv4 addresses
===========================================================================================================================
:class:`~django.core.validators.URLValidator`,
:func:`~django.core.validators.validate_ipv4_address`, and
:func:`~django.core.validators.validate_ipv46_address` didn't prohibit leading
zeros in octal literals. If you used such values you could suffer from
indeterminate SSRF, RFI, and LFI attacks.
:func:`~django.core.validators.validate_ipv4_address` and
:func:`~django.core.validators.validate_ipv46_address` validators were not
affected on Python 3.9.5+.
Bugfixes
========
* Fixed a bug in Django 3.2 where a final catch-all view in the admin didn't
respect the server-provided value of ``SCRIPT_NAME`` when redirecting
unauthenticated users to the login page (:ticket:`32754`).
* Fixed a bug in Django 3.2 where a system check would crash on an abstract
model (:ticket:`32733`).
* Prevented unnecessary initialization of unused caches following a regression
in Django 3.2 (:ticket:`32747`).
* Fixed a crash in Django 3.2 that could occur when running ``mod_wsgi`` with
the recommended settings while the Windows ``colorama`` library was installed
(:ticket:`32740`).
* Fixed a bug in Django 3.2 that would trigger the auto-reloader for template
changes when directory paths were specified with strings (:ticket:`32744`).
* Fixed a regression in Django 3.2 that caused a crash of auto-reloader with
``AttributeError``, e.g. inside a ``Conda`` environment (:ticket:`32783`).
* Fixed a regression in Django 3.2 that caused a loss of precision for
operations with ``DecimalField`` on MySQL (:ticket:`32793`).