CVE-2024-56374: django DoS — Fix

Description

An issue was discovered in Django 5.1 before 5.1.5, 5.0 before 5.0.11, and 4.2 before 4.2.18. Lack of upper-bound limit enforcement in strings passed when performing IPv6 validation could lead to a potential denial-of-service attack. The undocumented and private functions clean_ipv6_address and is_valid_ipv6_address are vulnerable, as is the django.forms.GenericIPAddressField form field. (The django.db.models.GenericIPAddressField model field is not affected.)

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CVSS v3.1 Score

5.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
djangoproject	django	4.2 — 4.2.18
djangoproject	django	5.0 — 5.0.11
djangoproject	django	5.1 — 5.1.5
debian	debian_linux	All

References

Advisories & Patches

https://docs.djangoproject.com/en/dev/releases/security/ https://groups.google.com/g/django-announce https://www.djangoproject.com/weblog/2025/jan/14/security-releases/

Other References

http://www.openwall.com/lists/oss-security/2025/01/14/2 https://lists.debian.org/debian-lts-announce/2025/01/msg00024.html

Frequently Asked Questions

What is CVE-2024-56374? +

An issue was discovered in Django 5.1 before 5.1.5, 5.0 before 5.0.11, and 4.2 before 4.2.18. Lack of upper-bound limit enforcement in strings passed when performing IPv6 validation could lead to a potential denial-of-service attack. The undocumented and private functions clean_ipv6_address and is_valid_ipv6_address are vulnerable, as is the django.forms.GenericIPAddressField form field. (The django.db.models.GenericIPAddressField model field is not affected.) It has a CVSS v3.1 base score of 5.8 (MEDIUM).

How severe is CVE-2024-56374? +

CVE-2024-56374 has a CVSS v3.1 score of 5.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-56374? +

CVE-2024-56374 affects products from debian, djangoproject, specifically: debian_linux, django. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-56374? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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