CVE-2021-33571

Description

In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_ipv46_address do not prohibit leading zero characters in octal literals. This may allow a bypass of access control that is based on IP addresses. (validate_ipv4_address and validate_ipv46_address are unaffected with Python 3.9.5+..) .

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://security.archlinux.org/ASA-202106-41
• https://nvd.nist.gov/vuln/detail/CVE-2021-33571
• https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
• https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
• https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
• https://docs.djangoproject.com/en/3.2/releases/security
• https://github.com/advisories/GHSA-p99v-5w3c-jqq9
• https://github.com/django/django
• https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2021-99.yaml
• https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV
• https://security.netapp.com/advisory/ntap-20210727-0004
• https://www.djangoproject.com/weblog/2021/jun/02/security-releases
• https://docs.djangoproject.com/en/3.2/releases/security/
• https://www.djangoproject.com/weblog/2021/jun/02/security-releases/
• https://www.suse.com/security/cve/CVE-2021-33571.html
• https://security-tracker.debian.org/tracker/CVE-2021-33571