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CVE-2022-25304

Estado: ModificadaAlta (7.5)—

All versions of package opcua; all versions of package asyncua are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.

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 (2)

Asyncua Project — AsyncuaOpcua Project — Opcua

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2022-25304",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "report@snyk.io",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
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  },
  "affected": [
    {
      "source": "report@snyk.io",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "opcua",
          "versions": [
            {
              "status": "affected",
              "version": "0",
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  "published": "2022-08-23T05:15:07.987",
  "references": [
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      "url": "https://github.com/FreeOpcUa/python-opcua/issues/1466",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
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    },
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      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731",
      "tags": [
        "Third Party Advisory"
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      "source": "report@snyk.io"
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      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730",
      "tags": [
        "Third Party Advisory"
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      "source": "report@snyk.io"
    },
    {
      "url": "https://github.com/FreeOpcUa/python-opcua/issues/1466",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "All versions of package opcua; all versions of package asyncua are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk."
    },
    {
      "lang": "es",
      "value": "Todas las versiones del paquete opcua; todas las versiones del paquete asyncua son vulnerables a una Denegación de Servicio (DoS) debido a una falta de limitación en el número de chunks recibidos - por sesión única o en total para todas las sesiones concurrentes. Un atacante puede explotar esta vulnerabilidad mediante el envío de un número ilimitado de chunks enormes (por ejemplo, 2GB cada uno) sin enviar el chunk de cierre Final."
    }
  ],
  "lastModified": "2026-06-17T04:33:21.410",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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            },
            {
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              "vulnerable": true,
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          "operator": "OR"
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  ],
  "sourceIdentifier": "report@snyk.io"
}