FKIE_CVE-2015-8620

Vulnerability from fkie_nvd - Published: 2016-04-13 14:59 - Updated: 2026-05-06 22:30
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Heap-based buffer overflow in the Avast virtualization driver (aswSnx.sys) in Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus before 11.1.2253 allows local users to gain privileges via a Unicode file path in an IOCTL request.
References
cve@mitre.orghttp://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://seclists.org/fulldisclosure/2016/Feb/94Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttp://www.securitytracker.com/id/1035093Third Party Advisory, VDB Entry
cve@mitre.orghttps://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/Exploit
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2016/Feb/94Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1035093Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/Exploit
Impacted products
Vendor Product Version
avast avast_free_antivirus *
avast avast_internet_security *
avast avast_premier *
avast avast_pro_antivirus *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:avast:avast_free_antivirus:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "98114D98-B923-4D1C-97F2-89CAAF21214E",
              "versionEndIncluding": "11.1.2245",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:avast:avast_internet_security:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "333F54CD-DEFF-4EB8-8062-F8E7CEFB3E82",
              "versionEndIncluding": "11.1.2245",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:avast:avast_premier:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C749D4B9-46D1-45FF-A3F0-0CC272FD904E",
              "versionEndIncluding": "11.1.2245",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:avast:avast_pro_antivirus:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "86CF89C2-F55D-42B4-8154-D22EC7BF463B",
              "versionEndIncluding": "11.1.2245",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Heap-based buffer overflow in the Avast virtualization driver (aswSnx.sys) in Avast Internet Security, Pro Antivirus, Premier, and Free Antivirus before 11.1.2253 allows local users to gain privileges via a Unicode file path in an IOCTL request."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de buffer basado en memoria din\u00e1mica en el controlador de virtualizaci\u00f3n de Avast (aswSnx.sys) en Avast Internet Security, Pro Antivirus, Premier y Free Antivirus en versiones anteriores a 11.1.2253 permite a usuarios locales obtener privilegios a trav\u00e9s de una ruta de archivo Unicode en una petici\u00f3n IOCTL."
    }
  ],
  "id": "CVE-2015-8620",
  "lastModified": "2026-05-06T22:30:45.220",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.2,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2016-04-13T14:59:03.437",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://seclists.org/fulldisclosure/2016/Feb/94"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1035093"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit"
      ],
      "url": "https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/135859/Avast-11.1.2245-Heap-Overflow.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://seclists.org/fulldisclosure/2016/Feb/94"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1035093"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit"
      ],
      "url": "https://www.nettitude.co.uk/exploiting-a-kernel-paged-pool-buffer-overflow-in-avast-virtualization-driver/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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