CVE-2009-2477

Estado: ModificadaAlta (9.3)—💥 Exploit

El archivo js/src/jstracer.cpp en el compilador JavaScript Just-in-Time (JIT) (también se conoce como TraceMonkey) en Firefox de Mozilla versiones 3.5 anteriores a 3.5.1, permite a los atacantes remotos ejecutar código arbitrario por medio de cierto uso de la función escape que desencadena el acceso a ubicaciones de memoria no inicializadas, como es demostrado originalmente por un documento que contiene elementos P y FONT.

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: 43%
Percentil entre todas las CVEs puntuadas: 99
Fecha de la puntuación: 13/10/2026

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) · Firefox 3.5 escape() Return Value Memory Corruption
Publicado en Exploit-DB · Naenara Browser 3.5 (RedStar 3.0 Desktop) - 'JACKRABBIT' Client-Side Command Execution (18/12/2016)
Publicado en Exploit-DB · Mozilla Firefox 3.5 - 'escape()' Return Value Memory Corruption (Metasploit) (20/9/2010)
Publicado en Exploit-DB · Mozilla Firefox 3.5 - 'Font tags' Remote HeapSpray (2) (20/7/2009)
Publicado en Exploit-DB · Mozilla Firefox 3.5 - Font tags Remote Buffer Overflow (13/7/2009)

Tecnologías afectadas (1)

Mozilla — Firefox

CWE

CWE-94

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2009-2477",
  "cveTags": [],
  "metrics": {
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      {
        "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": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2009-07-15T15:30:01.453",
  "references": [
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  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "js/src/jstracer.cpp in the Just-in-time (JIT) JavaScript compiler (aka TraceMonkey) in Mozilla Firefox 3.5 before 3.5.1 allows remote attackers to execute arbitrary code via certain use of the escape function that triggers access to uninitialized memory locations, as originally demonstrated by a document containing P and FONT elements."
    },
    {
      "lang": "es",
      "value": "El archivo js/src/jstracer.cpp en el compilador JavaScript Just-in-Time (JIT) (también se conoce como TraceMonkey) en Firefox de Mozilla versiones 3.5 anteriores a 3.5.1, permite a los atacantes remotos ejecutar código arbitrario por medio de cierto uso de la función escape que desencadena el acceso a ubicaciones de memoria no inicializadas, como es demostrado originalmente por un documento que contiene elementos P y FONT."
    }
  ],
  "lastModified": "2026-06-16T23:09:32.107",
  "configurations": [
    {
      "nodes": [
        {
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          "operator": "OR"
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}