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CVE-2020-27635

Estado: ModificadaCrítica (9.1)—

In PicoTCP 1.7.0, TCP ISNs are improperly random.

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)

Capgemini — Picotcp

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-27635",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2020-27635",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-19T15:01:43.014045Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
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          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "exploitabilityScore": 3.9
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  "affected": [
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      "affectedData": [
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  "published": "2023-10-10T17:15:10.703",
  "references": [
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      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01",
      "tags": [
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        "US Government Resource"
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      "url": "https://www.forescout.com",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-330"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In PicoTCP 1.7.0, TCP ISNs are improperly random."
    },
    {
      "lang": "es",
      "value": "En PicoTCP 1.7.0, los ISN de TCP son incorrectamente aleatorios."
    }
  ],
  "lastModified": "2026-06-17T03:09:24.397",
  "configurations": [
    {
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        {
          "negate": false,
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  "sourceIdentifier": "cve@mitre.org"
}