PYSEC-2021-99

vendorUSosv

view advisory published 2021-06-08Licence: CC-BY-4.0

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+..) .

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2021-33571US	high7.5	5.26% (93rd)	—	2021-06-08
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 oct…

references

External citations — patches, advisories, analysis.

https://docs.djangoproject.com/en/3.2/releases/security/WEB
https://github.com/advisories/GHSA-p99v-5w3c-jqq9ADVISORY
https://groups.google.com/g/django-announce/c/sPyjSKMi8EoWEB
https://www.djangoproject.com/weblog/2021/jun/02/security-releases/ARTICLE

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