{
  "id": "CVE-2021-29952",
  "sourceIdentifier": "security@mozilla.org",
  "published": "2021-06-24T14:15:09.973",
  "lastModified": "2021-06-25T20:19:25.257",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "When Web Render components were destructed, a race condition could have caused undefined behavior, and we presume that with enough effort may have been exploitable to run arbitrary code. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3."
    },
    {
      "lang": "es",
      "value": "Cuando se destru\u00edan los componentes de Web Render, una condici\u00f3n de carrera podr\u00eda haber causado un comportamiento indefinido, y presumimos que con suficiente esfuerzo podr\u00eda haber sido explotable para ejecutar c\u00f3digo arbitrario. Esta vulnerabilidad afecta a Firefox versiones anteriores a 88.0.1 y a Firefox para Android versiones anteriores a 88.1.3"
    }
  ],
  "metrics": {
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          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
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          "baseSeverity": "HIGH"
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        "exploitabilityScore": 1.6,
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          "accessVector": "NETWORK",
          "accessComplexity": "HIGH",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.1
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        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 4.9,
        "impactScore": 6.4,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-362"
        }
      ]
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  ],
  "configurations": [
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          "operator": "OR",
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          "cpeMatch": [
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  "references": [
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1704227",
      "source": "security@mozilla.org",
      "tags": [
        "Permissions Required",
        "Vendor Advisory"
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      "url": "https://www.mozilla.org/security/advisories/mfsa2021-20/",
      "source": "security@mozilla.org",
      "tags": [
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        "Vendor Advisory"
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    }
  ]
}