ubuntu-cve-2021-33571
Vulnerability from osv_ubuntu
Published
2021-06-02 09:00
Modified
2025-09-08 16:47
Summary
Details

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+..) .

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-django",
            "binary_version": "2:2.2.12-1ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "python-django",
        "purl": "pkg:deb/ubuntu/python-django@2:2.2.12-1ubuntu0.7?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:2.2.12-1ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.11.22-1ubuntu1",
        "2:2.2.6-1ubuntu1",
        "2:2.2.9-2ubuntu1",
        "2:2.2.10-1",
        "2:2.2.10-1ubuntu1",
        "2:2.2.11-1",
        "2:2.2.12-1",
        "2:2.2.12-1ubuntu0.1",
        "2:2.2.12-1ubuntu0.2",
        "2:2.2.12-1ubuntu0.3",
        "2:2.2.12-1ubuntu0.4",
        "2:2.2.12-1ubuntu0.5",
        "2:2.2.12-1ubuntu0.6"
      ]
    }
  ],
  "aliases": [],
  "details": "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+..) .",
  "id": "UBUNTU-CVE-2021-33571",
  "modified": "2025-09-08T16:47:12Z",
  "published": "2021-06-02T09:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33571"
    },
    {
      "type": "REPORT",
      "url": "https://www.djangoproject.com/weblog/2021/jun/02/security-releases/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4975-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-33571"
    }
  ],
  "related": [
    "USN-4975-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-33571"
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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