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CVE-2015-4497

Status: ModifiedHigh (10)—

Use-after-free vulnerability in the CanvasRenderingContext2D implementation in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to execute arbitrary code by leveraging improper interaction between resize events and changes to Cascading Style Sheets (CSS) token sequences for a CANVAS element.

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-2015-4497",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 10,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "security@mozilla.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2015-08-29T19:59:00.123",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00013.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2015-09/msg00000.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2015-1693.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.debian.org/security/2015/dsa-3345",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.mozilla.org/security/announce/2015/mfsa2015-94.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/76502",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1033397",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2723-1",
      "source": "security@mozilla.org"
    },
    {
      "url": "http://www.zerodayinitiative.com/advisories/ZDI-15-406",
      "source": "security@mozilla.org"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1164766",
      "source": "security@mozilla.org"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1175278",
      "source": "security@mozilla.org"
    },
    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2015-09/msg00000.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2015-1693.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2015/dsa-3345",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mozilla.org/security/announce/2015/mfsa2015-94.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/76502",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1033397",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2723-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.zerodayinitiative.com/advisories/ZDI-15-406",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1164766",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1175278",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in the CanvasRenderingContext2D implementation in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to execute arbitrary code by leveraging improper interaction between resize events and changes to Cascading Style Sheets (CSS) token sequences for a CANVAS element."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de uso después de liberación de memoria en la implementación de CanvasRenderingContext2D en Mozilla Firefox en versiones anteriores a 40.0.3 y Firefox ESR 38.x en versiones anteriores a 38.2.1, permite a atacantes remotos ejecutar código arbitrario mediante el aprovechamiento de la interacción inadecuada entre los eventos de cambio de tamaño y los cambios en las secuencias de token Cascading Style Sheets (CSS) para un elemento CANVAS."
    }
  ],
  "lastModified": "2026-06-17T00:27:24.520",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "35BF0AFB-26BA-4BEA-B6B8-11CF88E951DE"
            },
            {
              "criteria": "cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1F007CC6-9391-4E1C-A747-F3DE5E572FA5"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "45E9641F-430C-4B3A-BD63-EC13DBD3D1E4"
            },
            {
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              "matchCriteriaId": "5AADD23B-A8AF-4679-990D-C29A1D6EB5CD"
            },
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              "matchCriteriaId": "6D098567-B55E-4EAC-8FAA-31FAFDD4058F"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "59E90F00-714E-4F60-877D-1ED031C81622"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "evaluatorComment": "<a href=\"http://cwe.mitre.org/data/definitions/416.html\">CWE-416: Use After Free</a>",
  "sourceIdentifier": "security@mozilla.org"
}