#VU58552 Improper access control in Django - CVE-2021-44420

Vulnerability identifier: #VU58552

Vulnerability risk: Medium

CVSSv4.0: 2.7 [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/E:U/U:Green]

CVE-ID: CVE-2021-44420

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Django
Web applications / CMS

Vendor: Django Software Foundation

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Django: 2.2 - 2.2.24, 3.1 - 3.2.9, 4.0

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.