CVE-2024-41991

Advisory

Django has a potential denial-of-service vulnerability in django.utils.html.urlize() and AdminURLFieldWidget. The urlize and urlizetrunc functions, along with AdminURLFieldWidget, are vulnerable to denial-of-service attacks when handling inputs with a very large number of Unicode characters.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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

*August 6, 2024*

Django 4.2.15 fixes three security issues with severity "moderate", one
security issue with severity "high", and a regression in 4.2.14.

CVE-2024-41989: Memory exhaustion in ``django.utils.numberformat.floatformat()``
================================================================================

If :tfilter:`floatformat` received a string representation of a number in
scientific notation with a large exponent, it could lead to significant memory
consumption.

To avoid this, decimals with more than 200 digits are now returned as is.

CVE-2024-41990: Potential denial-of-service vulnerability in ``django.utils.html.urlize()``
===========================================================================================

:tfilter:`urlize` and :tfilter:`urlizetrunc` were subject to a potential
denial-of-service attack via very large inputs with a specific sequence of
characters.

CVE-2024-41991: Potential denial-of-service vulnerability in ``django.utils.html.urlize()`` and ``AdminURLFieldWidget``
=======================================================================================================================

:tfilter:`urlize`, :tfilter:`urlizetrunc`, and ``AdminURLFieldWidget`` were
subject to a potential denial-of-service attack via certain inputs with a very
large number of Unicode characters.

CVE-2024-42005: Potential SQL injection in ``QuerySet.values()`` and ``values_list()``
======================================================================================

:meth:`.QuerySet.values` and :meth:`~.QuerySet.values_list` methods on models
with a ``JSONField`` were subject to SQL injection in column aliases, via a
crafted JSON object key as a passed ``*arg``.

Bugfixes
========

* Fixed a regression in Django 4.2.14 that caused a crash in
``LocaleMiddleware`` when processing a language code over 500 characters
(:ticket:`35627`).


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

Resources

• https://github.com/django/django/commit/5f1757142febd95994caa1c0f64c1a0c161982c3/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-41991