Path traversal in Django

1) Path traversal

EUVDB-ID: #VU50172

Risk: High

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-3281

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences inside archives with "django.utils.archive.extract()" function. A remote attacker can pass specially crafted archive to the application and write files to arbitrary directory on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Django: 2.2 - 3.1.5

External links

http://www.djangoproject.com/weblog/2021/feb/01/security-releases/

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. However, proof of concept for this vulnerability is available.