{
  "id": "CVE-2020-10932",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2020-04-15T14:15:20.123",
  "lastModified": "2023-03-03T15:32:24.983",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en Arm Mbed TLS versiones anteriores a 2.16.6 y 2.7.x versiones anteriores a 2.7.15. Un atacante que puede obtener mediciones de canal lateral lo suficientemente precisas que puede recuperar la clave privada ECDSA a largo plazo al (1) reconstruir la coordenada proyectiva del resultado de la multiplicaci\u00f3n escalar explotando canales laterales en la conversi\u00f3n a coordenadas afines; (2) usar un ataque descrito por Naccache, Smart y Stern en 2003 para recuperar algunos bits del escalar ef\u00edmero de esas coordenadas proyectivas por medio de varias mediciones; y (3) usar un ataque de red para llegar desde all\u00ed a la clave privada ECDSA a largo plazo utilizada para las firmas. Com\u00fanmente, un atacante tendr\u00eda acceso suficiente al atacar un enclave SGX y controlar el Sistema Operativo no confiable."
    }
  ],
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        "type": "Primary",
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          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM"
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        "exploitabilityScore": 1.0,
        "impactScore": 3.6
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          "accessVector": "LOCAL",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 1.9
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 3.4,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
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        "obtainOtherPrivilege": false,
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          "value": "CWE-203"
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          "value": "CWE-327"
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      "url": "https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html",
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}