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CVE-2018-7557

Estado: ModificadaMedia (6.5)—
Gravedad6.5Media · CVSS 3.1
Probabilidad de explotación1.89 %mayor que el 79 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado

La función decode_init en libavcodec/utvideodec.c en FFmpeg versión 2.8 hasta la versión 3.4.2 permite a atacantes remotos causar una denegación de servicio (lectura fuera de array) utilizando un archivo AVI manipulado con dimensiones manipuladas en datos de submuestreo de crominancia

CVSS

Puntuación base
6.5
Versión
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
1.89 %
Percentil entre todas las CVEs puntuadas
79
Fecha de la puntuación
20/10/2026

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 (2)

Debian — Debian LinuxFfmpeg — Ffmpeg

CWE

Referencias

Mostrar las 10 referencias

JSON original (NVD)

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{
  "id": "CVE-2018-7557",
  "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": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
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  ],
  "published": "2018-02-28T07:29:00.463",
  "references": [
    {
      "url": "https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/7414d0bda7763f9bd69c26c068e482ab297c1c96",
      "tags": [
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        "Vendor Advisory"
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    {
      "url": "https://github.com/FFmpeg/FFmpeg/commit/e724bd1dd9efea3abb8586d6644ec07694afceae",
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2019/01/msg00006.html",
      "tags": [
        "Mailing List",
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/202003-65",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.debian.org/security/2018/dsa-4249",
      "tags": [
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    },
    {
      "url": "https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/7414d0bda7763f9bd69c26c068e482ab297c1c96",
      "tags": [
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    },
    {
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The decode_init function in libavcodec/utvideodec.c in FFmpeg 2.8 through 3.4.2 allows remote attackers to cause a denial of service (Out of array read) via an AVI file with crafted dimensions within chroma subsampling data."
    },
    {
      "lang": "es",
      "value": "La función decode_init en libavcodec/utvideodec.c en FFmpeg versión 2.8 hasta la versión 3.4.2 permite a atacantes remotos causar una denegación de servicio (lectura fuera de array) utilizando un archivo AVI manipulado con dimensiones manipuladas en datos de submuestreo de crominancia"
    }
  ],
  "lastModified": "2026-06-17T02:03:22.073",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7FE9FE81-AA1D-4869-996A-EEDC052D6374",
              "versionEndIncluding": "3.4.2",
              "versionStartIncluding": "2.8"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
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          "cpeMatch": [
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              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
            }
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          "operator": "OR"
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  ],
  "sourceIdentifier": "cve@mitre.org"
}