{
  "id": "CVE-2021-43398",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-11-04T21:15:09.520",
  "lastModified": "2024-11-21T06:29:09.903",
  "vulnStatus": "Modified",
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "disputed"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value"
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** Crypto++ (tambi\u00e9n se conoce como Cryptopp) versiones 8.6.0 y anteriores, contienen un filtrado de tiempo en la funci\u00f3n MakePublicKey(). Se presenta una clara correlaci\u00f3n entre el tiempo de ejecuci\u00f3n y la longitud de la clave privada, que puede causar una divulgaci\u00f3n de la informaci\u00f3n de la longitud de la clave privada. Esto podr\u00eda permitir a atacantes conducir ataques de tiempo. NOTA: este informe es discutido por el vendedor y por m\u00faltiples terceros. Las diferencias de tiempo de ejecuci\u00f3n son intencionadas. Un usuario puede elegir una clave m\u00e1s larga como compensaci\u00f3n entre la fuerza y el rendimiento. Al hacer esta elecci\u00f3n, la cantidad de informaci\u00f3n filtrada a un adversario es de valor infinitesimal"
    }
  ],
  "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:L/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "baseScore": 5.0,
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "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-203"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:cryptopp:crypto\\+\\+:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "8.6.0",
              "matchCriteriaId": "38083732-7F2F-45F1-B773-8BD7A039F08B"
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  ],
  "references": [
    {
      "url": "https://cryptopp.com",
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/weidai11/cryptopp/issues/1080",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
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    },
    {
      "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222",
      "source": "cve@mitre.org",
      "tags": [
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        "Issue Tracking",
        "Third Party Advisory"
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    },
    {
      "url": "https://cryptopp.com",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/weidai11/cryptopp/issues/1080",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222",
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}