{
  "id": "CVE-2021-31921",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-06-02T16:15:08.927",
  "lastModified": "2024-11-21T06:06:30.930",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Istio before 1.8.6 and 1.9.x before 1.9.5 contains a remotely exploitable vulnerability where an external client can access unexpected services in the cluster, bypassing authorization checks, when a gateway is configured with AUTO_PASSTHROUGH routing configuration."
    },
    {
      "lang": "es",
      "value": "Istio antes de la versi\u00f3n 1.8.6 y 1.9.x antes de la versi\u00f3n 1.9.5 contiene una vulnerabilidad explotable de forma remota por la que un cliente externo puede acceder a servicios inesperados en el cl\u00faster, salt\u00e1ndose las comprobaciones de autorizaci\u00f3n, cuando una puerta de enlace est\u00e1 configurada con la configuraci\u00f3n de enrutamiento AUTO_PASSTHROUGH"
    }
  ],
  "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:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL"
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.8.6",
              "matchCriteriaId": "CD72BDF7-907A-407F-94BF-ACDB1F8FFAD1"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.9.0",
              "versionEndExcluding": "1.9.5",
              "matchCriteriaId": "EF73EA19-5803-4F37-A250-1C8597A17FA1"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://istio.io/latest/news/security/istio-security-2021-006/",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://istio.io/latest/news/security/istio-security-2021-006/",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}