Vulnerability-Lookup

FKIE_CVE-2021-33571

Vulnerability from fkie_nvd - Published: 2021-06-08 18:15 - Updated: 2026-06-17 03:54

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

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+..) .

References

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

Impacted products

Vendor	Product	Version
djangoproject	django	*
djangoproject	django	*
djangoproject	django	*
fedoraproject	fedora	35

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CD5CCAE9-4A03-4C54-9278-BBA06A1C9ECF",
              "versionEndExcluding": "2.2.24",
              "versionStartIncluding": "2.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0895A526-5861-47FC-91AC-8F78387E464A",
              "versionEndExcluding": "3.1.12",
              "versionStartIncluding": "3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FACCFD9B-3783-4065-8F52-686D20149AAF",
              "versionEndExcluding": "3.2.4",
              "versionStartIncluding": "3.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
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              "criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
              "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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+..) ."
    },
    {
      "lang": "es",
      "value": "En Django versiones 2.2 anteriores a 2.2.24, versiones 3.x anteriores a 3.1.12 y versiones 3.2 anteriores a 3.2.4, las funciones URLValidator, validate_ipv4_address y validate_ipv46_address no proh\u00edben los caracteres cero a la izquierda en los literales octales. Esto puede permitir una omisi\u00f3n del control de acceso basado en las direcciones IP. (validate_ipv4_address y validate_ipv46_address no se ven afectados con Python versi\u00f3n 3.9.5+)"
    }
  ],
  "id": "CVE-2021-33571",
  "lastModified": "2026-06-17T03:54:48.600",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-06-08T18:15:08.517",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://docs.djangoproject.com/en/3.2/releases/security/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20210727-0004/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.djangoproject.com/weblog/2021/jun/02/security-releases/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://docs.djangoproject.com/en/3.2/releases/security/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20210727-0004/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://www.djangoproject.com/weblog/2021/jun/02/security-releases/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-33571 (GCVE-0-2021-33571)

Vulnerability from cvelistv5 – Published: 2021-06-08 00:00 – Updated: 2024-08-03 23:50

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

8 references

URL	Tags
https://docs.djangoproject.com/en/3.2/releases/se…
https://groups.google.com/g/django-announce/c/sPy…
https://www.djangoproject.com/weblog/2021/jun/02/…
https://security.netapp.com/advisory/ntap-2021072…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://github.com/django/django/commit/f27c38ab5…
https://github.com/django/django/commit/203d4ab9e…
https://github.com/django/django/commit/9f75e2e56…

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:50:43.143Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
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            ],
            "url": "https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo"
          },
          {
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            ],
            "url": "https://www.djangoproject.com/weblog/2021/jun/02/security-releases/"
          },
          {
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            "url": "https://security.netapp.com/advisory/ntap-20210727-0004/"
          },
          {
            "name": "FEDORA-2022-e7fd530688",
            "tags": [
              "vendor-advisory",
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            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/"
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    "state": "PUBLISHED"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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FKIE_CVE-2021-33571

CVE-2021-33571 (GCVE-0-2021-33571)

Tags

Sightings

Nomenclature

Related by attack behaviour