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CVE-2010-1987

Status: ModifiedMedium (5)—

Mozilla Firefox 3.6.3 on Windows XP SP3 allows remote attackers to cause a denial of service (memory consumption, out-of-bounds read, and application crash) via JavaScript code that appends long strings to the content of a P element, and performs certain other string concatenation and substring operations, related to the DoubleWideCharMappedString class in USP10.dll and the gfxWindowsFontGroup::GetUnderlineOffset function in xul.dll, a different vulnerability than CVE-2009-1571.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Mozilla — Firefox

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2010-1987",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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  "published": "2010-05-20T17:30:01.520",
  "references": [
    {
      "url": "http://osvdb.org/64790",
      "source": "cve@mitre.org"
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    },
    {
      "lang": "es",
      "value": "Mozilla Firefox v3.6.3 en Windows XP SP3 permite a atacantes remotos provocar una denegación de servicio (consumo de memoria, lectura fuera de rango y caída de la aplicación) a través de código JavaScript que añade cadenas largas de caracteres  al contenido de un elemento P y realiza operaciones de concatenación de cadenas y subcadenas relacionado con la clase DoubleWideCharMappedString class en USP10.dll y en la función gfxWindowsFontGroup::GetUnderlineOffset de xul.dll, diferente a la vulnerabilidad CVE-2009-1571."
    }
  ],
  "lastModified": "2026-06-16T23:19:43.220",
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