Denial of service in Django on Windows

1) Resource exhaustion

EUVDB-ID: #VU82638

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-46695

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources during NFKC normalization. A remote attacker can pass a very large number of Unicode characters to "django.contrib.auth.forms.UsernameField" and perform a denial of service (DoS) attack.

The vulnerability affects Windows installations only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Django: 3.2 - 4.2.6

External links

http://www.djangoproject.com/weblog/2023/nov/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.