CVE-2021-45115

Impact

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.

Affected packages

Affected products

Weakness classification

References

• NVD record
• CVE.org record
• GitHub advisory
• https://docs.djangoproject.com/en/4.0/releases/security/
• 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/
• https://www.djangoproject.com/weblog/2022/jan/04/security-releases/
• https://github.com/advisories/GHSA-53qw-q765-4fww
• https://nvd.nist.gov/vuln/detail/CVE-2021-45115
• https://groups.google.com/forum/#!forum/django-announce
• https://github.com/django/django/commit/2135637fdd5ce994de110affef9e67dffdf77277
• https://github.com/django/django/commit/a8b32fe13bcaed1c0b772fdc53de84abc224fb20
• https://github.com/django/django/commit/df79ef03ac867c93caaa6be56bc69e66abfeef8f
• https://docs.djangoproject.com/en/4.0/releases/security
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV
• https://security.netapp.com/advisory/ntap-20220121-0005
• https://www.djangoproject.com/weblog/2022/jan/04/security-releases
• https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2022-1.yaml