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CVE-2019-1551

Estado: ModificadaMedia (5.3)—

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (9)

Canonical — Ubuntu LinuxDebian — Debian LinuxFedoraproject — FedoraOpenssl — OpensslOpensuse — LeapOracle — Enterprise Manager OPS CenterOracle — Mysql Enterprise MonitorOracle — Peoplesoft Enterprise PeopletoolsTenable — LOG Correlation Engine

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2019-1551",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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        "impactScore": 1.4,
        "exploitabilityScore": 3.9
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t)."
    },
    {
      "lang": "es",
      "value": "Hay un error de desbordamiento en el procedimiento de cuadratura Montgomery x64_64 utilizado en exponenciación con módulos de 512 bits. No hay algoritmos EC afectados. El análisis sugiere que los ataques contra 2-prime RSA1024, 3-prime RSA1536 y DSA1024 como resultado de este defecto serían muy difíciles de realizar y no se cree probable. Los ataques contra DH512 se consideran simplemente factibles. Sin embargo, para un ataque, el objetivo tendría que reutilizar la clave privada DH512, que de todos modos no se recomienda. También las aplicaciones que usan directamente la API de bajo nivel BN_mod_exp pueden verse afectadas si usan BN_FLG_CONSTTIME. Corregido en OpenSSL 1.1.1e (afectado 1.1.1-1.1.1d). Corregido en OpenSSL 1.0.2u (afectado 1.0.2-1.0.2t)."
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  "lastModified": "2026-06-17T02:28:43.940",
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