PyPi: Django

CVE-2021-33571

Safety vulnerability ID: 40638

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at Jun 08, 2021 Updated at Nov 05, 2024
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Advisory

Django 2.2.24, 3.1.12, and 3.2.4 include a fix for CVE-2021-33571: 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+).
https://www.djangoproject.com/weblog/2021/jun/02/security-releases

Affected package

django

Latest version: 5.1.3

A high-level Python web framework that encourages rapid development and clean, pragmatic design.

Affected versions

Fixed versions

Vulnerability changelog

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+..) . See CVE-2021-33571.


CONFIRM:https://www.djangoproject.com/weblog/2021/jun/02/security-releases/: https://www.djangoproject.com/weblog/2021/jun/02/security-releases/
MISC:https://docs.djangoproject.com/en/3.2/releases/security/: https://docs.djangoproject.com/en/3.2/releases/security/
MISC:https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo: https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo

Resources

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Severity Details

CVSS Base Score

HIGH 7.5

CVSS v3 Details

HIGH 7.5
Attack Vector (AV)
NETWORK
Attack Complexity (AC)
LOW
Privileges Required (PR)
NONE
User Interaction (UI)
NONE
Scope (S)
UNCHANGED
Confidentiality Impact (C)
NONE
Integrity Impact (I)
HIGH
Availability Availability (A)
NONE

CVSS v2 Details

MEDIUM 5.0
Access Vector (AV)
NETWORK
Access Complexity (AC)
LOW
Authentication (Au)
NONE
Confidentiality Impact (C)
NONE
Integrity Impact (I)
PARTIAL
Availability Impact (A)
NONE