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CVE-2020-25756

Estado: ModificadaCrítica (9.8)—

A buffer overflow vulnerability exists in the mg_get_http_header function in Cesanta Mongoose 6.18 due to a lack of bounds checking. A crafted HTTP header can exploit this bug. NOTE: a committer has stated "this will not happen in practice.

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)

Cesanta — Mongoose

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-25756",
  "cveTags": [
    {
      "tags": [
        "disputed"
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      "sourceIdentifier": "cve@mitre.org"
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  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-25756",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-06-26T19:58:00.766760Z"
        }
      }
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    "cvssMetricV2": [
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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          "confidentialityImpact": "HIGH"
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  "affected": [
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  "published": "2020-09-18T05:15:13.197",
  "references": [
    {
      "url": "https://github.com/cesanta/mongoose/issues/1135",
      "tags": [
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        "Patch",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
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      "url": "https://github.com/cesanta/mongoose/issues/1135",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "A buffer overflow vulnerability exists in the mg_get_http_header function in Cesanta Mongoose 6.18 due to a lack of bounds checking. A crafted HTTP header can exploit this bug. NOTE: a committer has stated \"this will not happen in practice."
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** Una vulnerabilidad de desbordamiento del búfer se presenta en la función mg_get_http_header en Cesanta Mongoose versión 6.18, debido a una falta de comprobación de límites. Un encabezado HTTP diseñado puede explotar este bug. NOTA: un confirmador ha declarado \"this will not happen in practice\""
    }
  ],
  "lastModified": "2026-06-17T03:07:15.027",
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}