CVE-2021-41079

Estado: ModificadaAlta (7.5)—

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 7.18%
Percentil entre todas las CVEs puntuadas: 94
Fecha de la puntuación: 6/10/2026

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 (3)

Apache — Tomcat Debian — Debian Linux Netapp — Management Services FOR Element Software AND Netapp HCI

CWE

CWE-20
CWE-835

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2021-41079",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV31": [
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        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
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          "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
      }
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  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Tomcat",
          "versions": [
            {
              "status": "affected",
              "version": "Apache Tomcat 8.5 8.5.0 to 8.5.63"
            },
            {
              "status": "affected",
              "version": "Apache Tomcat 9 9.0.0-M1 to 9.0.43"
            },
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              "status": "affected",
              "version": "Apache Tomcat 10 10.0.0-M1 to 10.0.2"
            }
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  ],
  "published": "2021-09-16T15:15:07.690",
  "references": [
    {
      "url": "https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E",
      "source": "security@apache.org"
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    {
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      "source": "security@apache.org"
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    {
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      "tags": [
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    {
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      "tags": [
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      "source": "security@apache.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20211008-0005/",
      "tags": [
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      "source": "security@apache.org"
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    {
      "url": "https://www.debian.org/security/2021/dsa-4986",
      "tags": [
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      "source": "security@apache.org"
    },
    {
      "url": "https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E",
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    {
      "url": "https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3E",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security@apache.org",
      "description": [
        {
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          "value": "CWE-20"
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    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-835"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service."
    },
    {
      "lang": "es",
      "value": "Apache Tomcat versiones 8.5.0 hasta 8.5.63, versiones 9.0.0-M1 hasta 9.0.43 y versiones 10.0.0-M1 hasta 10.0.2, no comprueban apropiadamente los paquetes TLS entrantes. Cuando Tomcat estaba configurado para usar NIO+OpenSSL o NIO2+OpenSSL para TLS, un paquete especialmente diseñado podía usarse para desencadenar un bucle infinito resultando en una denegación de servicio"
    }
  ],
  "lastModified": "2026-06-17T04:07:49.997",
  "configurations": [
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            },
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              "matchCriteriaId": "D1913B71-5187-4648-878E-81CB62D17F8A",
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              "matchCriteriaId": "CB83F761-FB97-4573-AB91-C15121E25240",
              "versionEndIncluding": "10.0.2",
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              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"
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              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"
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    {
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}