« Volver al listado

CVE-2026-34183

Estado: AnalizadaAlta (7.5)—

Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames.

Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QUIC client or server and a Denial of Service.

A remote peer may exhaust heap memory by flooding the local QUIC stack with PATH_CHALLENGE frames. The local QUIC stack allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives. The allocated PATH_RESPONSE frame gets freed only when the remote peer acknowledges reception of the PATH_RESPONSE frame which will not be done by a malicious peer.

Leer descripción completaMostrar menos

The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue. The QUIC stack is outside of OpenSSL FIPS module boundary.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector CVSS AV:N/AC:L/PR:N/UI:N indica explotación remota sin privilegios (T1190). El atacante inunda con tramas PATH_CHALLENGE para agotar memoria heap causando DoS (T1499.004, especificado en CWE-1325 como resource exhaustion).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Openssl — Openssl

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-34183",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34183",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-10T15:50:50.340971Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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
      }
    ]
  },
  "affected": [
    {
      "source": "openssl-security@openssl.org",
      "affectedData": [
        {
          "vendor": "OpenSSL",
          "product": "OpenSSL",
          "versions": [
            {
              "status": "affected",
              "version": "4.0.0",
              "lessThan": "4.0.1",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.6.0",
              "lessThan": "3.6.3",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.5.0",
              "lessThan": "3.5.7",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.4.0",
              "lessThan": "3.4.6",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-06-09T17:17:05.000",
  "references": [
    {
      "url": "https://github.com/openssl/openssl/commit/5b306efb0b3779dfdd0803b4afc9d08c91f11517",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/7d06955ebe0ecf8adfd4c1e92018586da47ef9ac",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/d2e9efbe4900a373227deb136e8665401404ffac",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/fbaa83859c01ad64f497b757aaf51be7d05ed9eb",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://openssl-library.org/news/secadv/20260609.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "openssl-security@openssl.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "openssl-security@openssl.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1325"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: Remote peer may exhaust heap memory of the QUIC\nserver or client by flooding it with packets containing PATH_CHALLENGE\nframes.\n\nImpact summary: A malicious remote peer can cause an unbounded\nmemory allocation which can lead to an abnormal termination of the\napplication acting as a QUIC client or server and a Denial of Service.\n\nA remote peer may exhaust heap memory by flooding the local\nQUIC stack with PATH_CHALLENGE frames. The local QUIC stack\nallocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives.\nThe allocated PATH_RESPONSE frame gets freed only when the remote\npeer acknowledges reception of the PATH_RESPONSE frame which will\nnot be done by a malicious peer.\n\nThe FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by\nthis issue. The QUIC stack is outside of OpenSSL FIPS module\nboundary."
    },
    {
      "lang": "es",
      "value": "Resumen del problema: Un par remoto puede agotar la memoria del montón del servidor o cliente QUIC inundándolo con paquetes que contienen tramas PATH_CHALLENGE.\n\nResumen del impacto: Un par remoto malicioso puede causar una asignación de memoria ilimitada que puede llevar a una terminación anormal de la aplicación que actúa como cliente o servidor QUIC y a una denegación de servicio.\n\nUn par remoto puede agotar la memoria del montón inundando la pila QUIC local con tramas PATH_CHALLENGE. La pila QUIC local asigna una trama PATH_RESPONSE por cada PATH_CHALLENGE que recibe. La trama PATH_RESPONSE asignada se libera solo cuando el par remoto acusa recibo de la trama PATH_RESPONSE, lo cual no será hecho por un par malicioso.\n\nLos módulos FIPS en 4.0, 3.6, 3.5, 3.4 y 3.0 no se ven afectados por este problema. La pila QUIC está fuera del límite del módulo FIPS de OpenSSL."
    }
  ],
  "lastModified": "2026-07-23T08:10:00.137",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BF7E21E7-AEC0-4882-B1F1-2D056B506F22",
              "versionEndExcluding": "3.4.6",
              "versionStartIncluding": "3.4.0"
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6B6B9930-C549-4D88-9784-AF32CCDDB87A",
              "versionEndExcluding": "3.5.7",
              "versionStartIncluding": "3.5.0"
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D41B3C45-EC73-4DC8-989D-B2E2792E102F",
              "versionEndExcluding": "3.6.3",
              "versionStartIncluding": "3.6.0"
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6E881B9A-1A0A-4BC0-8160-20C00561167D"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org"
}