Improper access control in Django - CVE-2021-44420

Vulnerability identifier: #VU58552

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-44420

CWE-ID: CWE-284

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote attacker can send specially crafted HTTP requests for URLs with trailing newlines and bypass an upstream access control based on URL paths.

Django
Gentoo Linux
Ubuntu
Fedora
python3-django (Ubuntu package)
python-django
dev-python/django
Red Hat Update Infrastructure (RHUI)

Install updates from vendor's website.

Django - addressed in versions 2.2.25, 3.1.14, 3.2.10
python3-django (Ubuntu package) - addressed in versions 2:2.2.12-1ubuntu0.8, 2:2.2.20-1ubuntu0.3, 2:2.2.24-1ubuntu1.1
python-django - update to 3.2.12-1.fc35
Red Hat Update Infrastructure (RHUI) - update to 4.3.0
dev-python/django - update to 5.2.1

• https://www.djangoproject.com/weblog/2021/dec/07/security-releases/

• Improper access control in Django
• Ubuntu update for python-django
• Multiple vulnerabilties in Red Hat Update Infrastructure (RHUI)
• Fedora 35 update for python-django
• Gentoo update for Django