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CVE-2020-1892

Estado: ModificadaAlta (8.1)—

Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory, potentially leading to information leak and DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7.

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)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-1892",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
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          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
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          "userInteraction": "REQUIRED",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.2,
        "exploitabilityScore": 2.8
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  "affected": [
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          "product": "HHVM",
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  ],
  "published": "2020-03-03T15:15:11.993",
  "references": [
    {
      "url": "https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d",
      "tags": [
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    },
    {
      "url": "https://hhvm.com/blog/2020/02/20/security-update.html",
      "tags": [
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    {
      "url": "https://github.com/facebook/hhvm/commit/dabd48caf74995e605f1700344f1ff4a5d83441d",
      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "cve-assign@fb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
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    {
      "type": "Primary",
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      "description": [
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  "descriptions": [
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      "lang": "en",
      "value": "Insufficient boundary checks when decoding JSON in JSON_parser allows read access to out of bounds memory, potentially leading to information leak and DOS. This issue affects HHVM 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versions between 4.33.0 and 4.38.0 (inclusive), versions between 4.9.0 and 4.32.0 (inclusive), and versions prior to 4.8.7."
    },
    {
      "lang": "es",
      "value": "Comprobaciones de límites insuficientes cuando se decodifica JSON en JSON_parser permiten un acceso de lectura en una memoria fuera de límites, conllevando a un filtrado de información y a una DOS. Este problema afecta a HHVM versiones 4.45.0, 4.44.0, 4.43.0, 4.42.0, 4.41.0, 4.40.0, 4.39.0, versiones entre 4.33.0 y 4.38.0 (inclusive), versiones entre 4.9.0 y 4.32.0 (inclusive), y versiones anteriores a 4.8.7."
    }
  ],
  "lastModified": "2026-06-17T03:02:33.990",
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