CVE-2021-45115
In a situation where access to user registration was unrestricted, this provided a potential vector for a denial-of-service attack.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Django 2.2 before 2.2.26, 3.2 before 3.2.11, and 4.0 before 4.0.1. UserAttributeSimilarityValidator incurred significant overhead in evaluating a submitted password that was artificially large in relation to the comparison values. In a situation where access to user registration was unrestricted, this provided a potential vector for a denial-of-service attack.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.42% probability · 83th percentile
- CISA KEV
- Not listed
- Affected
- djangoproject/django · fedoraproject/fedora
- Source
- cve@mitre.org
References
- https://docs.djangoproject.com/en/4.0/releases/security/Patch, Vendor Advisory
- https://groups.google.com/forum/#%21forum/django-announce
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
- https://security.netapp.com/advisory/ntap-20220121-0005/Third Party Advisory
- https://www.djangoproject.com/weblog/2022/jan/04/security-releases/Patch, Vendor Advisory
- https://docs.djangoproject.com/en/4.0/releases/security/Patch, Vendor Advisory
- https://groups.google.com/forum/#%21forum/django-announce
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
- https://security.netapp.com/advisory/ntap-20220121-0005/Third Party Advisory
- https://www.djangoproject.com/weblog/2022/jan/04/security-releases/Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.