Arch Linux alert ASA-202505-10 (python-django)

From:
             
 
Andrea Denisse <denisse@archlinux.org>
To:
             
 
arch-security <arch-security@lists.archlinux.org>
Subject:
             
 
[ASA-202505-10] python-django: denial of service
Date:
             
 
Tue, 20 May 2025 13:17:07 -0600
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<e5d830935e20facd7a570e7363860eb141abac12.camel@archlinux.org>
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Article
Arch Linux Security Advisory ASA-202505-10
==========================================

Severity: Medium
Date    : 2025-05-19
CVE-ID  : CVE-2025-32873
Package : python-django
Type    : denial of service
Remote  : Yes
Link    : https://security.archlinux.org/AVG-2876

Summary
=======

The package python-django before version 5.1.9-1 is vulnerable to
denial of service.

Resolution
==========

Upgrade to 5.1.9-1.

# pacman -Syu "python-django>=5.1.9-1"

The problem has been fixed upstream in version 5.1.9.

Workaround
==========

None.

Description
===========

django.utils.html.strip_tags() would be slow to evaluate certain inputs
containing large sequences of incomplete HTML tags. This function is
used to implement the striptags template filter, which was thus also
vulnerable. django.utils.html.strip_tags() now raises a
SuspiciousOperation exception if it encounters an unusually large
number of unclosed opening tags.

Impact
======

A remote attacker can exploit inefficient HTML tag parsing in Django’s
strip_tags() function to cause excessive CPU usage, leading to a denial
of service. This may affect applications that use the striptags
template filter to sanitize user-controlled input, making them
vulnerable to slowdown or unresponsiveness when handling specially
crafted HTML content.

References
==========

https://www.djangoproject.com/weblog/2025/may/07/security...
https://security.archlinux.org/CVE-2025-32873