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CVE-2021-20304

Estado: ModificadaAlta (7.5)—

A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability.

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)

Openexr — Openexr

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-20304",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "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": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "OpenEXR",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in OpenEXR 3.0.0-beta"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-08-23T16:15:09.087",
  "references": [
    {
      "url": "https://access.redhat.com/security/cve/CVE-2021-20304",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1939157",
      "tags": [
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      "source": "secalert@redhat.com"
    },
    {
      "url": "https://github.com/AcademySoftwareFoundation/openexr/commit/51a92d67f53c08230734e74564c807043cbfe41e",
      "tags": [
        "Patch",
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      "source": "secalert@redhat.com"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "https://security.gentoo.org/glsa/202210-31",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in OpenEXR's hufDecode functionality. This flaw allows an attacker who can pass a crafted file to be processed by OpenEXR, to trigger an undefined right shift error. The highest threat from this vulnerability is to system availability."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo en la funcionalidad hufDecode de OpenEXR. Este fallo permite a un atacante que pueda pasar un archivo diseñado para ser procesado por OpenEXR, desencadenar un error de desplazamiento a la derecha no definido. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema."
    }
  ],
  "lastModified": "2026-06-17T03:33:38.340",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5AA57D0D-80D4-442D-8686-698527811EA4",
              "versionEndIncluding": "2.5.7"
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          "operator": "OR"
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  ],
  "sourceIdentifier": "secalert@redhat.com"
}