CVE-2010-3971

Estado: ModificadaAlta (9.3)—💥 Exploit

Vulnerabilidad de uso después de liberación en la función CSharedStyleSheet::Notify en el parseado Cascading Style Sheets (CSS) en mshtml.dll, como el usado en Microsoft Internet Explorer v7 y v8 y probablemente otros productos, permite a atacantes remotos causar una denegación de servicio (caída) y ejecutar código de su elección a través de multiples llamdas @import en un documento manipulado.

CVSS

Versión: 2.0
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Puntuación base: 9.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 82%
Percentil entre todas las CVEs puntuadas: 100
Fecha de la puntuación: 7/10/2026

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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

Módulo de Metasploit (exploit fiable y al alcance de cualquiera) · MS11-003 Microsoft Internet Explorer CSS Recursive Import Use After Free
Publicado en Exploit-DB · Microsoft Internet Explorer - CSS Recursive Import Use-After-Free (MS11-003) (Metasploit) (8/2/2011)
Publicado en Exploit-DB · Microsoft Internet Explorer 8 - CSS Parser (15/12/2010)
Publicado en Exploit-DB · Microsoft Internet Explorer 8 - CSS Parser Denial of Service (8/12/2010)
Prueba de concepto en GitHub (no verificada) · Lista de pruebas de concepto en GitHub

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (1)

Microsoft — Internet Explorer

CWE

CWE-399

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2010-3971",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2010-12-22T21:00:17.723",
  "references": [
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      "url": "http://blogs.technet.com/b/srd/archive/2011/01/07/assessing-the-risk-of-public-issues-currently-being-tracked-by-the-msrc.aspx",
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    },
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      "source": "secure@microsoft.com"
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    {
      "url": "http://support.avaya.com/css/P8/documents/100127294",
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    {
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in the CSharedStyleSheet::Notify function in the Cascading Style Sheets (CSS) parser in mshtml.dll, as used in Microsoft Internet Explorer 6 through 8 and other products, allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a self-referential @import rule in a stylesheet, aka \"CSS Memory Corruption Vulnerability.\""
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de uso después de liberación en la función CSharedStyleSheet::Notify en el parseado Cascading Style Sheets (CSS) en mshtml.dll, como el usado en Microsoft Internet Explorer v7 y v8 y probablemente otros productos, permite a atacantes remotos causar una denegación de servicio (caída) y ejecutar código de su elección a través de multiples llamdas @import en un documento manipulado."
    }
  ],
  "lastModified": "2026-06-16T23:23:55.010",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1A33FA7F-BB2A-4C66-B608-72997A2BD1DB"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A52E757F-9B41-43B4-9D67-3FEDACA71283"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "secure@microsoft.com"
}