{
  "id": "CVE-2020-8843",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2020-02-14T19:15:10.683",
  "lastModified": "2020-02-19T16:16:00.003",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en Istio versiones 1.3 hasta 1.3.6. En determinadas circunstancias, es posible omitir una pol\u00edtica Mixer configurada espec\u00edficamente. Istio-proxy acepta el encabezado x-istio-attributes en la entrada que puede ser usado para afectar las decisiones de la pol\u00edtica cuando la pol\u00edtica Mixer se aplica selectivamente a una fuente igual a la entrada. Para explotar esta vulnerabilidad, alguien tiene que codificar un archivo source.uid en este encabezado. Esta funcionalidad est\u00e1 deshabilitada por defecto en Istio versiones 1.3 y 1.4."
    }
  ],
  "metrics": {
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.8
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 4.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.3.0",
              "versionEndIncluding": "1.3.6",
              "matchCriteriaId": "A63CAC85-C108-4980-ABE3-6FED91D2ABA5"
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  "references": [
    {
      "url": "https://github.com/istio/istio/commits/master",
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://istio.io/news/security/",
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://istio.io/news/security/istio-security-2020-002/",
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
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    }
  ]
}