Vulnerability Monitor

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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+..) .

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 2 products from djangoproject, from fedoraproject organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-06-08T18:15:08.517

Last Modified

2024-11-21T06:09:06.823

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-918

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	djangoproject	django	< 2.2.24	Yes
Application	djangoproject	django	< 3.1.12	Yes
Application	djangoproject	django	< 3.2.4	Yes
Operating System	fedoraproject	fedora	35	Yes

References

https://docs.djangoproject.com/en/3.2/releases/security/ Patch, Vendor Advisory ([email protected])
https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e ([email protected])
https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d ([email protected])
https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc ([email protected])
https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/ ([email protected])
https://security.netapp.com/advisory/ntap-20210727-0004/ Third Party Advisory ([email protected])
https://www.djangoproject.com/weblog/2021/jun/02/security-releases/ Patch, Vendor Advisory ([email protected])
https://docs.djangoproject.com/en/3.2/releases/security/ Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20210727-0004/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.djangoproject.com/weblog/2021/jun/02/security-releases/ Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For djangoproject's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.