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CVE-2025-15468

Estado: AnalizadaMedia (5.9)—

Issue summary: If an application using the SSL_CIPHER_find() function in a QUIC protocol client or server receives an unknown cipher suite from the peer, a NULL dereference occurs.

Impact summary: A NULL pointer dereference leads to abnormal termination of the running process causing Denial of Service.

Some applications call SSL_CIPHER_find() from the client_hello_cb callback on the cipher ID received from the peer. If this is done with an SSL object implementing the QUIC protocol, NULL pointer dereference will happen if the examined cipher ID is unknown or unsupported.

As it is not very common to call this function in applications using the QUIC protocol and the worst outcome is Denial of Service, the issue was assessed as Low severity.

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The vulnerable code was introduced in the 3.2 version with the addition of the QUIC protocol support.

The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue, as the QUIC implementation is outside the OpenSSL FIPS module boundary.

OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue.

OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.

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)

Openssl — Openssl

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-15468",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-15468",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-29T14:52:10.289567Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
    ]
  },
  "affected": [
    {
      "source": "openssl-security@openssl.org",
      "affectedData": [
        {
          "vendor": "OpenSSL",
          "product": "OpenSSL",
          "versions": [
            {
              "status": "affected",
              "version": "3.6.0",
              "lessThan": "3.6.1",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.5.0",
              "lessThan": "3.5.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.4.0",
              "lessThan": "3.4.4",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.3.0",
              "lessThan": "3.3.6",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-01-27T16:16:14.400",
  "references": [
    {
      "url": "https://github.com/openssl/openssl/commit/1f08e54bad32843044fe8a675948d65e3b4ece65",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/7c88376731c589ee5b36116c5a6e32d5ae5f7ae2",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/b2539639400288a4580fe2d76247541b976bade4",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/d75b309879631d45b972396ce4e5102559c64ac7",
      "tags": [
        "Patch"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://openssl-library.org/news/secadv/20260127.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "openssl-security@openssl.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "openssl-security@openssl.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: If an application using the SSL_CIPHER_find() function in\na QUIC protocol client or server receives an unknown cipher suite from\nthe peer, a NULL dereference occurs.\n\nImpact summary: A NULL pointer dereference leads to abnormal termination of\nthe running process causing Denial of Service.\n\nSome applications call SSL_CIPHER_find() from the client_hello_cb callback\non the cipher ID received from the peer. If this is done with an SSL object\nimplementing the QUIC protocol, NULL pointer dereference will happen if\nthe examined cipher ID is unknown or unsupported.\n\nAs it is not very common to call this function in applications using the QUIC \nprotocol and the worst outcome is Denial of Service, the issue was assessed\nas Low severity.\n\nThe vulnerable code was introduced in the 3.2 version with the addition\nof the QUIC protocol support.\n\nThe FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue,\nas the QUIC implementation is outside the OpenSSL FIPS module boundary.\n\nOpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue.\n\nOpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue."
    },
    {
      "lang": "es",
      "value": "Resumen del problema: Si una aplicación que utiliza la función SSL_CIPHER_find() en un cliente o servidor del protocolo QUIC recibe un conjunto de cifrado desconocido del par, ocurre una desreferencia de NULL.\n\nResumen del impacto: Una desreferencia de puntero NULL conduce a la terminación anormal del proceso en ejecución causando Denegación de Servicio.\n\nAlgunas aplicaciones llaman a SSL_CIPHER_find() desde la devolución de llamada client_hello_cb en el ID de cifrado recibido del par. Si esto se hace con un objeto SSL que implementa el protocolo QUIC, ocurrirá una desreferencia de puntero NULL si el ID de cifrado examinado es desconocido o no compatible.\n\nComo no es muy común llamar a esta función en aplicaciones que utilizan el protocolo QUIC y el peor resultado es Denegación de Servicio, el problema fue evaluado como de baja severidad.\n\nEl código vulnerable fue introducido en la versión 3.2 con la adición del soporte para el protocolo QUIC.\n\nLos módulos FIPS en 3.6, 3.5, 3.4 y 3.3 no se ven afectados por este problema, ya que la implementación de QUIC está fuera del límite del módulo FIPS de OpenSSL.\n\nOpenSSL 3.6, 3.5, 3.4 y 3.3 son vulnerables a este problema.\n\nOpenSSL 3.0, 1.1.1 y 1.0.2 no se ven afectados por este problema."
    }
  ],
  "lastModified": "2026-06-17T08:37:50.723",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5292E9E-6B50-409F-9219-7B0A04047AD8",
              "versionEndExcluding": "3.3.6",
              "versionStartIncluding": "3.3.0"
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B9D3DCAE-317D-4DFB-93F0-7A235A229619",
              "versionEndExcluding": "3.4.4",
              "versionStartIncluding": "3.4.0"
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1CAC7CBE-EC03-4089-938A-0CEEB2E09B62",
              "versionEndExcluding": "3.5.5",
              "versionStartIncluding": "3.5.0"
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "68352537-5E99-4F4D-B78A-BCF0353A70A5",
              "versionEndExcluding": "3.6.1",
              "versionStartIncluding": "3.6.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org"
}