{
  "id": "CVE-2021-33503",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-06-29T11:15:07.847",
  "lastModified": "2023-01-24T19:35:56.233",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema en urllib3 versiones anteriores a 1.26.5. Cuando se proporciona una URL que contiene muchos caracteres @ en el componente authority, la expresi\u00f3n regular de autoridad muestra un retroceso catastr\u00f3fico, causando una denegaci\u00f3n de servicio si fue pasado una URL como par\u00e1metro o es redirigido a ella por medio de un redireccionamiento HTTP"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.25.4",
              "matchCriteriaId": "DE6ED8B6-5858-42F0-A646-503FAB8EE39C"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.26.0",
              "versionEndExcluding": "1.26.5",
              "matchCriteriaId": "F4967244-2BB6-4780-9FC3-00FD40248457"
            }
          ]
        }
      ]
    },
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
              "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835"
            }
          ]
        }
      ]
    },
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "B095CC03-7077-4A58-AB25-CC5380CDCE5A"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "82EA4BA7-C38B-4AF3-8914-9E3D089EBDD4"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "B9C9BC66-FA5F-4774-9BDA-7AB88E2839C4"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "7F69B9A5-F21B-4904-9F27-95C0F7A628E3"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
              "matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/advisories/GHSA-q2q7-5pp4-w6pg",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/urllib3/urllib3/commit/2d4a3fee6de2fa45eb82169361918f759269b4ec",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6SCV7ZNAHS3E6PBFLJGENCDRDRWRZZ6W/",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FMUGWEAUYGGHTPPXT6YBD53WYXQGVV73/",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://security.gentoo.org/glsa/202107-36",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.oracle.com/security-alerts/cpuoct2021.html",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    }
  ]
}