CVE-2023-43665

In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.

Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

Security Fix(es):

An inefficient regular expression complexity was found in Django. The text truncator regular expressions exhibit linear backtracking complexity, which can be slow, leading to a potential denial of service, given certain HTML inputs.(CVE-2023-43665)

In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.

In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.

TuxCare rebuilt django to address 1 CVE. Fixed in 4.0.post7+tuxcare.

TuxCare rebuilt django to address 20 CVEs. Fixed in 4.2.post17+tuxcare.

In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.

This update for python-Django fixes the following issues:

• CVE-2023-43665: Denial-of-service in django.utils.text.Truncator (boo#1215978).

This update for python-Django fixes the following issues:

• CVE-2023-43665: Denial-of-service in django.utils.text.Truncator (boo#1215978).

This update for python-Django1 fixes the following issues:

• CVE-2023-43665: Fixed Denial-of-service vulnerability in django.utils.text.Truncator (boo#1215978).

This update for python-Django1 fixes the following issues:

• CVE-2023-43665: Fixed Denial-of-service vulnerability in django.utils.text.Truncator (boo#1215978).

These are all security issues fixed in the python310-Django-4.2.6-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python310-Django4-4.2.14-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python312-Django6-6.0-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python313-Django4-4.2.30-4.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python313-Django-5.2.16-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the python313-Django5-5.2.16-1.1 package on the GA media of openSUSE Tumbleweed.

In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.

This update for python-Django fixes the following issues:

• CVE-2023-43665: Fixed a Denial-of-service in django.utils.text.Truncator. (bsc#1215978)

This update for python-Django1 fixes the following issues:

• CVE-2023-43665: Fixed a denial of service in django.utils.text.Truncator (bsc#1215978).

Wenchao Li discovered that the Django Truncator function incorrectly handled very long HTML input. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service.

USN-6414-1 and USN-6378-1 fixed CVE-2023-43665 and CVE-2023-41164 in Django, respectively. This update provides the corresponding update for Ubuntu 18.04 LTS.

Original advisory details:

Wenchao Li discovered that the Django Truncator function incorrectly handled very long HTML input. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service.

It was discovered that Django incorrectly handled certain URIs with a very large number of Unicode characters. A remote attacker could possibly use this issue to cause Django to consume resources or crash, leading to a denial of service.