FKIE_CVE-2020-10867

Vulnerability from fkie_nvd - Published: 2020-04-01 18:15 - Updated: 2024-11-21 04:56
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 Avast Antivirus before 20. The aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe) allows attackers to bypass intended access restrictions on tasks from an untrusted process, when Self Defense is enabled.
References
cve@mitre.orghttps://forum.avast.com/index.php?topic=232420.0Release Notes, Vendor Advisory
cve@mitre.orghttps://forum.avast.com/index.php?topic=232423.0Release Notes, Vendor Advisory
cve@mitre.orghttps://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.mdExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://forum.avast.com/index.php?topic=232420.0Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://forum.avast.com/index.php?topic=232423.0Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.mdExploit, Third Party Advisory
Impacted products
Vendor Product Version
avast antivirus *
microsoft windows -
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "76526B74-4398-42D9-A110-599151A4ABB7",
              "versionEndExcluding": "20.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Avast Antivirus before 20. The aswTask RPC endpoint for the TaskEx library in the Avast Service (AvastSvc.exe) allows attackers to bypass intended access restrictions on tasks from an untrusted process, when Self Defense is enabled."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en Avast Antivirus versiones anteriores a 20. El endpoint de aswTask RPC para la biblioteca TaskEx en el Avast Service (AvastSvc.exe) permite a atacantes omitir las restricciones de acceso previstas en tareas a partir de un proceso no confiable, cuando Self Defense est\u00e1 habilitado."
    }
  ],
  "id": "CVE-2020-10867",
  "lastModified": "2024-11-21T04:56:15.307",
  "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": "2020-04-01T18:15:15.507",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://forum.avast.com/index.php?topic=232420.0"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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        "Vendor Advisory"
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    },
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        "Third Party Advisory"
      ],
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    },
    {
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      "tags": [
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      "url": "https://forum.avast.com/index.php?topic=232423.0"
    },
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      "url": "https://github.com/umarfarook882/Avast_Multiple_Vulnerability_Disclosure/blob/master/README.md"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-668"
        }
      ],
      "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.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.