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CVE-2020-6096

Estado: ModificadaAlta (8.1)—

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

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 (3)

Debian — Debian LinuxFedoraproject — FedoraGNU — Glibc

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-6096",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2020-6096",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-02-13T20:06:27.632557Z"
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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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        "obtainOtherPrivilege": false,
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  "published": "2020-04-01T22:15:18.503",
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "talos-cna@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-195"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-191"
        },
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          "lang": "en",
          "value": "CWE-681"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de comparación firmada explotable en la implementación de la función memcpy() de ARMv7 de GNU glibc versión 2.30.9000. Llamar a la función memcpy() (en objetivos ARMv7 que utilizan la implementación GNU glibc) con un valor negativo para el parámetro \"num\" resulta en una vulnerabilidad de comparación firmada. Si un atacante desborda el parámetro \"num\" en la función memcpy(), esta vulnerabilidad podría conllevar a un comportamiento indefinido, como escribir en la memoria fuera de límites y una potencial ejecución de código remota. Además, esta implementación de la función memcpy() permite que la ejecución del programa continúe en escenarios donde un fallo de segmentación o bloqueo debería haberse producido. Los peligros se presentan en que la ejecución posterior y las iteraciones de este código son ejecutadas con estos datos corruptos."
    }
  ],
  "lastModified": "2026-06-17T03:22:40.820",
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              "versionEndIncluding": "2.31"
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  "sourceIdentifier": "talos-cna@cisco.com"
}