Vulnerability 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+..) .
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Djangoproject | Django | >= 2.2, < 2.2.24 |
| Fedoraproject | Fedora | 35 |
Related Weaknesses (CWE)
References
- https://docs.djangoproject.com/en/3.2/releases/security/PatchVendor Advisory
- https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
- https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
- https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
- https://groups.google.com/g/django-announce/c/sPyjSKMi8EoMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20210727-0004/Third Party Advisory
- https://www.djangoproject.com/weblog/2021/jun/02/security-releases/PatchVendor Advisory
- https://docs.djangoproject.com/en/3.2/releases/security/PatchVendor Advisory
- https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
- https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
- https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
- https://groups.google.com/g/django-announce/c/sPyjSKMi8EoMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20210727-0004/Third Party Advisory
FAQ
What is CVE-2021-33571?
CVE-2021-33571 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ma...
How severe is CVE-2021-33571?
CVE-2021-33571 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-33571?
Check the references section above for vendor advisories and patch information. Affected products include: Djangoproject Django, Fedoraproject Fedora.