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CVE-2024-4741

Estado: AplazadaAlta (7.5)—

Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause memory to be accessed that was previously freed in some situations

Impact summary: A use after free can have a range of potential consequences such as the corruption of valid data, crashes or execution of arbitrary code. However, only applications that directly call the SSL_free_buffers function are affected by this issue. Applications that do not call this function are not vulnerable. Our investigations indicate that this function is rarely used by applications.

The SSL_free_buffers function is used to free the internal OpenSSL buffer used when processing an incoming record from the network.

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The call is only expected to succeed if the buffer is not currently in use. However, two scenarios have been identified where the buffer is freed even when still in use.

The first scenario occurs where a record header has been received from the network and processed by OpenSSL, but the full record body has not yet arrived. In this case calling SSL_free_buffers will succeed even though a record has only been partially processed and the buffer is still in use.

The second scenario occurs where a full record containing application data has been received and processed by OpenSSL but the application has only read part of this data. Again a call to SSL_free_buffers will succeed even though the buffer is still in use.

While these scenarios could occur accidentally during normal operation a malicious attacker could attempt to engineer a stituation where this occurs. We are not aware of this issue being actively exploited.

The FIPS modules in 3.3, 3.2, 3.1 and 3.0 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).

🎯 Técnicas ATT&CK

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

Vulnerabilidad de use-after-free (CWE-416) en OpenSSL accesible remotamente sin autenticación (AV:N/PR:N). El impacto principal es DoS por corrupción de memoria y crashes en el servidor que procesa registros TLS parciales o datos no leídos por la aplicación.

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Openssl — OpensslAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-4741",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-4741",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-11-13T14:45:07.092438Z"
        }
      }
    ],
    "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": "3.3.0",
              "lessThan": "3.3.1",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.2.0",
              "lessThan": "3.2.2",
              "versionType": "semver"
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            {
              "status": "affected",
              "version": "3.1.0",
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              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.0.0",
              "lessThan": "3.0.14",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.1.1",
              "lessThan": "1.1.1y",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
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    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:openssl:openssl:-:*:*:*:*:*:*:*"
          ],
          "vendor": "openssl",
          "product": "openssl",
          "versions": [
            {
              "status": "affected",
              "version": "1.1.1",
              "lessThan": "1.1.1y",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.0.0",
              "lessThan": "3.0.14",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.1.0",
              "lessThan": "3.1.6",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.2.0",
              "lessThan": "3.2.2",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "3.3.0",
              "lessThan": "3.3.1",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-11-13T11:15:04.480",
  "references": [
    {
      "url": "https://github.com/openssl/openssl/commit/704f725b96aa373ee45ecfb23f6abfe8be8d9177",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/b3f0eb0a295f58f16ba43ba99dad70d4ee5c437d",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/c88c3de51020c37e8706bf7a682a162593053aac",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.com/openssl/openssl/commit/e5093133c35ca82874ad83697af76f4b0f7e3bd8",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://github.openssl.org/openssl/extended-releases/commit/f7a045f3143fc6da2ee66bf52d8df04829590dd4",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.openssl.org/news/secadv/20240528.txt",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20240621-0004/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "openssl-security@openssl.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: Calling the OpenSSL API function SSL_free_buffers may cause\nmemory to be accessed that was previously freed in some situations\n\nImpact summary: A use after free can have a range of potential consequences such\nas the corruption of valid data, crashes or execution of arbitrary code.\nHowever, only applications that directly call the SSL_free_buffers function are\naffected by this issue. Applications that do not call this function are not\nvulnerable. Our investigations indicate that this function is rarely used by\napplications.\n\nThe SSL_free_buffers function is used to free the internal OpenSSL buffer used\nwhen processing an incoming record from the network. The call is only expected\nto succeed if the buffer is not currently in use. However, two scenarios have\nbeen identified where the buffer is freed even when still in use.\n\nThe first scenario occurs where a record header has been received from the\nnetwork and processed by OpenSSL, but the full record body has not yet arrived.\nIn this case calling SSL_free_buffers will succeed even though a record has only\nbeen partially processed and the buffer is still in use.\n\nThe second scenario occurs where a full record containing application data has\nbeen received and processed by OpenSSL but the application has only read part of\nthis data. Again a call to SSL_free_buffers will succeed even though the buffer\nis still in use.\n\nWhile these scenarios could occur accidentally during normal operation a\nmalicious attacker could attempt to engineer a stituation where this occurs.\nWe are not aware of this issue being actively exploited.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue."
    },
    {
      "lang": "es",
      "value": "Resumen del problema: Llamar a la función de API de OpenSSL SSL_free_buffers puede provocar que se acceda a la memoria que se liberó previamente en algunas situaciones Resumen del impacto: Un use after free puede tener una variedad de posibles consecuencias, como la corrupción de datos válidos, fallas o ejecución de código arbitrario. Sin embargo, solo las aplicaciones que llaman directamente a la función SSL_free_buffers se ven afectadas por este problema. Las aplicaciones que no llaman a esta función no son vulnerables. Nuestras investigaciones indican que las aplicaciones rara vez usan esta función. La función SSL_free_buffers se usa para liberar el búfer interno de OpenSSL que se usa al procesar un registro entrante de la red. Solo se espera que la llamada tenga éxito si el búfer no está actualmente en uso. Sin embargo, se han identificado dos escenarios en los que el búfer se libera incluso cuando todavía está en uso. El primer escenario ocurre cuando se recibió un encabezado de registro de la red y OpenSSL lo procesó, pero aún no llegó el cuerpo completo del registro. En este caso, llamar a SSL_free_buffers tendrá éxito incluso si un registro solo se procesó parcialmente y el búfer todavía está en uso. El segundo escenario ocurre cuando OpenSSL ha recibido y procesado un registro completo que contiene datos de la aplicación, pero la aplicación solo ha leído parte de estos datos. Nuevamente, una llamada a SSL_free_buffers tendrá éxito aunque el búfer aún esté en uso. Si bien estos escenarios podrían ocurrir accidentalmente durante el funcionamiento normal, un atacante malintencionado podría intentar crear una situación en la que esto ocurra. No tenemos conocimiento de que este problema se esté explotando activamente. Los módulos FIPS en 3.3, 3.2, 3.1 y 3.0 no se ven afectados por este problema."
    }
  ],
  "lastModified": "2026-06-17T08:02:32.007",
  "sourceIdentifier": "openssl-security@openssl.org"
}