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CVE-2018-19589

Estado: ModificadaMedia (6.5)—

Incorrect Access Controls of Security Officer (SO) in PKCS11 R2 provider that ships with the Utimaco CryptoServer HSM product package allows an SO authenticated to a slot to retrieve attributes of keys marked as private keys in external key storage, and also delete keys marked as private keys in external key storage. This compromises the availability of all keys configured with external key storage and may result in an economic attack in which the attacker denies legitimate users access to keys while maintaining possession of an encrypted copy (blob) of the external key store for ransom.

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This attack has been dubbed reverse ransomware attack and may be executed via a physical connection to the CryptoServer or remote connection if SSH or remote access to LAN CryptoServer has been compromised. The Confidentiality and Integrity of the affected keys, however, remain untarnished.

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 (1)

Utimaco — Securityserver CSE Firmware

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-19589",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV30": [
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "affected": [
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      "source": "cve@mitre.org",
      "affectedData": [
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          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
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  "published": "2019-04-09T17:29:00.270",
  "references": [
    {
      "url": "https://support.hsm.utimaco.com/support/security-advisories/-/blogs/cve-2018-19589",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
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    {
      "url": "https://www.linkedin.com/pulse/does-hsm-guarantee-cryptographic-key-security-kwadjo-nyante/",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Incorrect Access Controls of Security Officer (SO) in PKCS11 R2 provider that ships with the Utimaco CryptoServer HSM product package allows an SO authenticated to a slot to retrieve attributes of keys marked as private keys in external key storage, and also delete keys marked as private keys in external key storage. This compromises the availability of all keys configured with external key storage and may result in an economic attack in which the attacker denies legitimate users access to keys while maintaining possession of an encrypted copy (blob) of the external key store for ransom. This attack has been dubbed reverse ransomware attack and may be executed via a physical connection to the CryptoServer or remote connection if SSH or remote access to LAN CryptoServer has been compromised. The Confidentiality and Integrity of the affected keys, however, remain untarnished."
    },
    {
      "lang": "es",
      "value": "Los Controles de Acceso incorrectos del  Security Officer (SO) en el proveedor PKCS11 R2 que se envía con el paquete del producto Utimaco CryptoServer HSM permite que un SO identificado en un espacio recupere los atributos de las claves marcadas como claves privadas en el almacenamiento de las claves externas, y también elimine las claves marcadas como claves privadas  en el almacenamiento de las claves externas. Esto compromete la disponibilidad de todas las claves configuradas con almacenamiento de claves externas y puede resultar en un ataque económico en el cual el atacante niega el acceso de los usuarios legítimos a las claves mientras mantiene la posesión de una copia encriptada (blob) del almacén de clave externo para obtener un rescate. Este ataque se ha denominado ataque de ransomware inverso y puede ejecutarse por medio de una conexión física a CryptoServer o conexión remota si SSH o el acceso remoto a LAN CryptoServer se ha comprometido. La confidencialidad y la integridad de las claves afectadas, sin embargo, permanecen intactas."
    }
  ],
  "lastModified": "2026-06-17T01:49:34.097",
  "configurations": [
    {
      "nodes": [
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          "negate": false,
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  "sourceIdentifier": "cve@mitre.org"
}