cve/2021/CVE-2021-33571.md

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+..) .

POC

Reference

• https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo

Github

• https://github.com/ARPSyndicate/cvemon