FKIE_CVE-2020-8961

Vulnerability from fkie_nvd - Published: 2020-04-09 20:15 - Updated: 2024-11-21 05:39
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
An issue was discovered in Avira Free-Antivirus before 15.0.2004.1825. The Self-Protection feature does not prohibit a write operation from an external process. Thus, code injection can be used to turn off this feature. After that, one can construct an event that will modify a file at a specific location, and pass this event to the driver, thereby defeating the anti-virus functionality.
References
cve@mitre.orghttps://support.avira.com/hc/en-us/articles/360000109798-Avira-Antivirus-for-WindowsRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.avira.com/hc/en-us/articles/360000109798-Avira-Antivirus-for-WindowsRelease Notes, Vendor Advisory
Impacted products
Vendor Product Version
avira free_antivirus *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:avira:free_antivirus:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3DE32787-5DA0-4BE1-B093-98B479689E49",
              "versionEndExcluding": "15.0.2004.1825",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Avira Free-Antivirus before 15.0.2004.1825. The Self-Protection feature does not prohibit a write operation from an external process. Thus, code injection can be used to turn off this feature. After that, one can construct an event that will modify a file at a specific location, and pass this event to the driver, thereby defeating the anti-virus functionality."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en Avira Free-Antivirus versiones anteriores a 15.0.2004.1825. La funcionalidad Self-Protection no proh\u00edbe una operaci\u00f3n de escritura desde un proceso externo. Por lo tanto, una inyecci\u00f3n de c\u00f3digo puede ser usada para desactivar esta funci\u00f3n. Despu\u00e9s de eso, se puede construir un evento que modificar\u00e1 un archivo en una ubicaci\u00f3n espec\u00edfica y pasar este evento al controlador, lo cual anular\u00e1 la funcionalidad antivirus."
    }
  ],
  "id": "CVE-2020-8961",
  "lastModified": "2024-11-21T05:39:44.950",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-04-09T20:15:12.403",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://support.avira.com/hc/en-us/articles/360000109798-Avira-Antivirus-for-Windows"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Vendor Advisory"
      ],
      "url": "https://support.avira.com/hc/en-us/articles/360000109798-Avira-Antivirus-for-Windows"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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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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