{
  "id": "CVE-2021-40327",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2022-01-13T16:15:07.993",
  "lastModified": "2022-01-25T14:35:47.253",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Trusted Firmware-M (TF-M) 1.4.0, when Profile Small is used, has incorrect access control. NSPE can access a secure key (held by the Crypto service) based solely on knowledge of its key ID. For example, there is no authorization check associated with the relationship between a caller and a key owner."
    },
    {
      "lang": "es",
      "value": "Trusted Firmware-M (TF-M) versi\u00f3n 1.4.0, cuando es usado el perfil Small, presenta un control de acceso incorrecto. NSPE puede acceder a una clave segura (mantenida por el servicio Crypto) bas\u00e1ndose \u00fanicamente en el conocimiento de su ID de clave. Por ejemplo, no es presentado ninguna comprobaci\u00f3n de autorizaci\u00f3n asociada a la relaci\u00f3n entre un llamante y el propietario de la clave"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "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:N/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "HIGH",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.6
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 4.9,
        "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-862"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:trustedfirmware:trusted_firmware-m:1.4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "FD1AEB4A-BECB-4082-AA62-A02B23D16F26"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://developer.arm.com/support/arm-security-updates",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://tf-m-user-guide.trustedfirmware.org/docs/security/security_advisories/profile_small_key_id_encoding_vulnerability.html",
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}